diff --git a/mobile/src/components/settings/LogoutSection.tsx b/mobile/src/components/settings/LogoutSection.tsx
index 4aaa417..8d2f419 100644
--- a/mobile/src/components/settings/LogoutSection.tsx
+++ b/mobile/src/components/settings/LogoutSection.tsx
@@ -1,6 +1,9 @@
 import { Alert } from "react-native";
 import { useTranslation } from "react-i18next";
 import { useAuth } from "@clerk/expo";
+import { useMutation } from "@tanstack/react-query";
+import { useTRPC } from "../../api/trpc";
+import { getRegisteredPushToken } from "../../hooks/usePushNotifications";
 import { useActivePet } from "../../context/ActivePetContext";
 import { Button } from "../Button";
 
@@ -22,6 +25,17 @@ export function LogoutSection() {
   const { t } = useTranslation();
   const { signOut } = useAuth();
   const { clearActivePetId } = useActivePet();
+  const trpc = useTRPC();
+  const clearPushToken = useMutation(trpc.owner.clearPushToken.mutationOptions());
+
+  const logout = async () => {
+    // Dieses Gerät vor dem Abmelden austragen, sonst kämen weiter Mitteilungen des alten Kontos an.
+    // Fehler (z. B. offline) dürfen das Abmelden nie blockieren.
+    const token = getRegisteredPushToken();
+    if (token) await clearPushToken.mutateAsync({ expoPushToken: token }).catch(() => undefined);
+    clearActivePetId();
+    await signOut();
+  };
 
   const confirmLogout = () => {
     Alert.alert(t("pets.logoutConfirmTitle"), t("pets.logoutConfirmMessage"), [
@@ -30,8 +44,7 @@ export function LogoutSection() {
         text: t("pets.logoutButton"),
         style: "destructive",
         onPress: () => {
-          clearActivePetId();
-          void signOut();
+          void logout();
         },
       },
     ]);
diff --git a/mobile/src/hooks/usePushNotifications.ts b/mobile/src/hooks/usePushNotifications.ts
index 98544a8..3f876f9 100644
--- a/mobile/src/hooks/usePushNotifications.ts
+++ b/mobile/src/hooks/usePushNotifications.ts
@@ -6,6 +6,12 @@ import { useMutation } from "@tanstack/react-query";
 import { useAuth } from "@clerk/expo";
 import { useTRPC } from "../api/trpc";
 
+/** Token dieses Geräts, sobald registriert — zum Abmelden beim Logout (owner.clearPushToken). */
+let registeredPushToken: string | null = null;
+export function getRegisteredPushToken(): string | null {
+  return registeredPushToken;
+}
+
 Notifications.setNotificationHandler({
   handleNotification: async () => ({
     shouldShowAlert: true,
@@ -72,7 +78,11 @@ export function usePushNotifications(): void {
             setTimeout(() => reject(new Error("Timed out after 15s")), 15000)
           ),
         ]);
-        if (!cancelled) registerMutation.mutate({ expoPushToken: token });
+        if (!cancelled) {
+          registeredPushToken = token;
+          // Push an mehrere Geräte: jedes Gerät wird zusätzlich eingetragen, nichts wird überschrieben.
+          registerMutation.mutate({ expoPushToken: token, platform: Platform.OS === "ios" ? "ios" : "android" });
+        }
       } catch (err) {
         console.warn("[push] Failed to get Expo push token", err);
       }
diff --git a/prisma/cleanup_lost_report_contacts.sql b/prisma/cleanup_lost_report_contacts.sql
new file mode 100644
index 0000000..4086818
--- /dev/null
+++ b/prisma/cleanup_lost_report_contacts.sql
@@ -0,0 +1,6 @@
+-- Datensparsamkeit (05.10.2026): Kontaktdaten bereits beendeter Vermisst-Meldungen
+-- löschen. Ab jetzt passiert das beim Finden/Schließen automatisch
+-- (lostReports.markFound, lostReportAdmin.moderate). Einmal ausführen.
+UPDATE public."LostReport"
+SET "contactPhone" = NULL, "contactEmail" = NULL
+WHERE "foundAt" IS NOT NULL AND ("contactPhone" IS NOT NULL OR "contactEmail" IS NOT NULL);
diff --git a/prisma/enable_rls_push_tokens.sql b/prisma/enable_rls_push_tokens.sql
new file mode 100644
index 0000000..c55d380
--- /dev/null
+++ b/prisma/enable_rls_push_tokens.sql
@@ -0,0 +1,12 @@
+-- Push an mehrere Geräte: neue Tabelle für den PostgREST-Zugriff sperren, wie
+-- alle anderen Tabellen (siehe enable_rls.sql). Die App greift ausschließlich
+-- über Prisma (Service-Rolle) zu. Nach dem prisma db push einmal ausführen.
+ALTER TABLE public."PushToken" ENABLE ROW LEVEL SECURITY;
+
+-- Bestehende Einzel-Tokens übernehmen, damit vorhandene Geräte nahtlos weiter
+-- Push bekommen (Owner.expoPushToken wird ab jetzt nicht mehr geschrieben).
+INSERT INTO public."PushToken" ("id", "ownerId", "token", "platform", "createdAt", "lastSeenAt")
+SELECT 'mig_' || md5("id"), "id", "expoPushToken", NULL, now(), now()
+FROM public."Owner"
+WHERE "expoPushToken" IS NOT NULL
+ON CONFLICT ("token") DO NOTHING;
diff --git a/prisma/schema.prisma b/prisma/schema.prisma
index 549ba95..d889647 100644
--- a/prisma/schema.prisma
+++ b/prisma/schema.prisma
@@ -24,7 +24,7 @@ model Owner {
   themePreference           ThemePreference? // null = follows system preference, never explicitly toggled
   hideSpiders               Boolean           @default(false) // Arachnophobie-Helfer: hides Species="Spider" pets/posts from feed/explore/search when true
   petSuggestionsEnabled     Boolean           @default(true) // opt-out for the PET_SUGGESTION cron notification (src/app/api/cron/pet-suggestions)
-  expoPushToken             String? // mobile app's Expo push token, registered via owner.registerPushToken; single device only, overwritten on re-register
+  expoPushToken             String? // ALT (bis 10/2026): ein Gerät pro Konto. Wird nicht mehr geschrieben, beim Versand nur noch mitgelesen — neue Geräte stehen in PushToken
 
   // Sponsoring (Gitea #22) — freiwilliger Beitrag/Abo gegen ein "Sponsor"-Badge.
   stripeCustomerId          String?               @unique
@@ -34,6 +34,7 @@ model Owner {
   sponsorSubscriptionStatus String?               @db.VarChar(20) // mirrors Stripe subscription.status
   contributions             SponsorContribution[]
   broadcastReceipts         BroadcastReceipt[]
+  pushTokens                PushToken[]
 
   // Empfehlungsprogramm — Clerk-unabhängig: der Code wird erst nach der
   // Registrierung im Onboarding eingelöst (src/lib/referrals.ts). invitedById
@@ -1162,3 +1163,19 @@ model BroadcastReceipt {
   @@unique([broadcastId, ownerId])
   @@index([ownerId, readAt])
 }
+
+// Push an mehrere Geräte (Roadmap 05.10.): ein Eintrag pro Gerät/App-Installation.
+// Der Token ist eindeutig — meldet sich auf demselben Handy ein anderes Konto an,
+// wandert der Eintrag zu diesem Konto. Tokens, die Expo als „DeviceNotRegistered“
+// meldet (App deinstalliert), löscht src/lib/notify.ts beim Versand.
+model PushToken {
+  id         String   @id @default(cuid())
+  owner      Owner    @relation(fields: [ownerId], references: [id], onDelete: Cascade)
+  ownerId    String
+  token      String   @unique
+  platform   String?  @db.VarChar(10) // "ios" | "android"
+  createdAt  DateTime @default(now())
+  lastSeenAt DateTime @default(now()) // bei jeder erneuten Registrierung (App-Start) aktualisiert
+
+  @@index([ownerId, lastSeenAt(sort: Desc)])
+}
diff --git a/src/__tests__/helpers/prisma-mock.ts b/src/__tests__/helpers/prisma-mock.ts
index 3137450..769ec29 100644
--- a/src/__tests__/helpers/prisma-mock.ts
+++ b/src/__tests__/helpers/prisma-mock.ts
@@ -379,6 +379,7 @@ interface MockPrismaClient {
   storyMention: { createMany: MockFn; findMany: MockFn; deleteMany: MockFn };
   lostReport: { findFirst: MockFn; findUnique: MockFn; findMany: MockFn; count: MockFn; create: MockFn; update: MockFn; delete: MockFn };
   verificationRequest: { findFirst: MockFn; findMany: MockFn; count: MockFn };
+  pushToken: { upsert: MockFn; findMany: MockFn; deleteMany: MockFn };
   message: { findFirst: MockFn; findMany: MockFn; count: MockFn };
   storyView: MockStoryViewClient;
   follow: MockFollowClient;
@@ -512,6 +513,11 @@ export function createMockPrisma(): MockPrismaClient {
       deleteMany: vi.fn(),
       aggregate: vi.fn(),
     },
+    pushToken: {
+      upsert: vi.fn(),
+      findMany: vi.fn().mockResolvedValue([]),
+      deleteMany: vi.fn().mockResolvedValue({ count: 0 }),
+    },
     verificationRequest: {
       findFirst: vi.fn().mockResolvedValue(null),
       findMany: vi.fn().mockResolvedValue([]),
diff --git a/src/__tests__/lost-report-admin.test.ts b/src/__tests__/lost-report-admin.test.ts
index a28f93a..1617868 100644
--- a/src/__tests__/lost-report-admin.test.ts
+++ b/src/__tests__/lost-report-admin.test.ts
@@ -51,7 +51,7 @@ describe("lostReportAdmin", () => {
 
     await lostReportAdminRouter.createCaller(ctx(prisma)).moderate({ reportId: "r1", mode: "CLOSE", reason: "vergessen" });
 
-    expect(prisma.lostReport.update).toHaveBeenCalledWith({ where: { id: "r1" }, data: { foundAt: expect.any(Date) } });
+    expect(prisma.lostReport.update).toHaveBeenCalledWith({ where: { id: "r1" }, data: { foundAt: expect.any(Date), contactPhone: null, contactEmail: null } });
     expect(prisma.pet.update).toHaveBeenCalledWith({ where: { id: "pet-1" }, data: { lostSince: null } });
     expect(prisma.moderationLog.create).toHaveBeenCalledWith({
       data: expect.objectContaining({ action: "CLOSE_LOST_REPORT", targetId: "pet-1", reason: "vergessen", moderatorRole: "MODERATOR" }),
diff --git a/src/__tests__/lost-reports.test.ts b/src/__tests__/lost-reports.test.ts
index 5fc7db1..b0af894 100644
--- a/src/__tests__/lost-reports.test.ts
+++ b/src/__tests__/lost-reports.test.ts
@@ -125,7 +125,7 @@ describe("lostReports router", () => {
     prisma.lostReport.findFirst.mockResolvedValue({ id: "r1" });
 
     await caller(OWNER, prisma).markFound({ petId: "pet-1", notifyAudience: false });
-    expect(prisma.lostReport.update).toHaveBeenCalledWith({ where: { id: "r1" }, data: { foundAt: expect.any(Date) } });
+    expect(prisma.lostReport.update).toHaveBeenCalledWith({ where: { id: "r1" }, data: { foundAt: expect.any(Date), contactPhone: null, contactEmail: null } });
     expect(prisma.pet.update).toHaveBeenCalledWith({ where: { id: "pet-1" }, data: { lostSince: null } });
     expect(prisma.follow.findMany).not.toHaveBeenCalled();
 
diff --git a/src/__tests__/notify-push.test.ts b/src/__tests__/notify-push.test.ts
index cc066e8..5a36408 100644
--- a/src/__tests__/notify-push.test.ts
+++ b/src/__tests__/notify-push.test.ts
@@ -9,10 +9,10 @@ import { describe, it, expect, vi, beforeEach } from "vitest";
 
 vi.mock("server-only", () => ({}));
 
-const { sendExpoPushNotification } = vi.hoisted(() => ({
-  sendExpoPushNotification: vi.fn().mockResolvedValue(undefined),
+const { sendExpoPushToTokens } = vi.hoisted(() => ({
+  sendExpoPushToTokens: vi.fn().mockResolvedValue({ invalidTokens: [] }),
 }));
-vi.mock("@/lib/push", () => ({ sendExpoPushNotification }));
+vi.mock("@/lib/push", () => ({ sendExpoPushToTokens }));
 
 import { createMockPrisma } from "@/__tests__/helpers/prisma-mock";
 import { notify } from "@/lib/notify";
@@ -26,7 +26,7 @@ async function flush() {
 
 describe("notify() push add-on", () => {
   beforeEach(() => {
-    sendExpoPushNotification.mockClear();
+    sendExpoPushToTokens.mockClear();
   });
 
   it("does not push when the recipient owner has no registered token", async () => {
@@ -39,7 +39,7 @@ describe("notify() push add-on", () => {
     notify(mockPrisma as any, { recipientPetId: "pet-1", type: "FOLLOW", actorPetId: "pet-2" });
     await flush();
 
-    expect(sendExpoPushNotification).not.toHaveBeenCalled();
+    expect(sendExpoPushToTokens).not.toHaveBeenCalled();
   });
 
   it("does not push when the recipient pet no longer exists", async () => {
@@ -51,7 +51,7 @@ describe("notify() push add-on", () => {
     notify(mockPrisma as any, { recipientPetId: "pet-1", type: "MESSAGE" });
     await flush();
 
-    expect(sendExpoPushNotification).not.toHaveBeenCalled();
+    expect(sendExpoPushToTokens).not.toHaveBeenCalled();
     expect(mockPrisma.owner.findUnique).not.toHaveBeenCalled();
   });
 
@@ -70,8 +70,8 @@ describe("notify() push add-on", () => {
     );
     await flush();
 
-    expect(sendExpoPushNotification).toHaveBeenCalledWith(
-      "ExponentPushToken[abc]",
+    expect(sendExpoPushToTokens).toHaveBeenCalledWith(
+      ["ExponentPushToken[abc]"],
       expect.objectContaining({ title: "Neuer Follower", body: "Rex folgt dir jetzt." })
     );
   });
@@ -89,8 +89,8 @@ describe("notify() push add-on", () => {
     );
     await flush();
 
-    expect(sendExpoPushNotification).toHaveBeenCalledWith(
-      "ExponentPushToken[abc]",
+    expect(sendExpoPushToTokens).toHaveBeenCalledWith(
+      ["ExponentPushToken[abc]"],
       expect.objectContaining({ title: "Geburtstag", body: "Ein Tier hat heute Geburtstag." })
     );
   });
@@ -110,14 +110,14 @@ describe("notify() push add-on", () => {
     );
     await flush();
 
-    expect(sendExpoPushNotification).toHaveBeenCalledWith(
-      "ExponentPushToken[abc]",
+    expect(sendExpoPushToTokens).toHaveBeenCalledWith(
+      ["ExponentPushToken[abc]"],
       expect.objectContaining({ title: "Vorschlag für dich", body: "Luna könnte dir gefallen!" })
     );
   });
 
   it("never throws from notify() even if the push request itself rejects", async () => {
-    sendExpoPushNotification.mockRejectedValueOnce(new Error("Expo push down"));
+    sendExpoPushToTokens.mockRejectedValueOnce(new Error("Expo push down"));
     const mockPrisma = createMockPrisma();
     mockPrisma.notification.create.mockResolvedValue({});
     mockPrisma.pet.findUnique.mockResolvedValue({ ownerId: "owner-1" });
@@ -130,3 +130,40 @@ describe("notify() push add-on", () => {
     await flush();
   });
 });
+
+describe("notify() push to multiple devices", () => {
+  beforeEach(() => {
+    sendExpoPushToTokens.mockClear();
+  });
+
+  it("pushes to every registered device plus the legacy token, without duplicates", async () => {
+    const mockPrisma = createMockPrisma();
+    mockPrisma.notification.create.mockResolvedValue({});
+    mockPrisma.pet.findUnique.mockResolvedValueOnce({ ownerId: "owner-1" }).mockResolvedValueOnce({ name: "Rex" });
+    mockPrisma.pushToken.findMany.mockResolvedValue([{ token: "ExponentPushToken[phone]" }, { token: "ExponentPushToken[tablet]" }]);
+    mockPrisma.owner.findUnique.mockResolvedValue({ expoPushToken: "ExponentPushToken[phone]" });
+
+    // eslint-disable-next-line @typescript-eslint/no-explicit-any
+    notify(mockPrisma as any, { recipientPetId: "pet-1", type: "FOLLOW", actorPetId: "pet-2" });
+    await flush();
+
+    expect(sendExpoPushToTokens).toHaveBeenCalledWith(["ExponentPushToken[phone]", "ExponentPushToken[tablet]"], expect.anything());
+    expect(mockPrisma.pushToken.findMany).toHaveBeenCalledWith({ where: { ownerId: "owner-1" }, select: { token: true } });
+  });
+
+  it("deletes tokens Expo reports as no longer registered, including the legacy one", async () => {
+    const mockPrisma = createMockPrisma();
+    mockPrisma.notification.create.mockResolvedValue({});
+    mockPrisma.pet.findUnique.mockResolvedValueOnce({ ownerId: "owner-1" }).mockResolvedValueOnce(null);
+    mockPrisma.pushToken.findMany.mockResolvedValue([{ token: "ExponentPushToken[old]" }, { token: "ExponentPushToken[new]" }]);
+    mockPrisma.owner.findUnique.mockResolvedValue({ expoPushToken: "ExponentPushToken[old]" });
+    sendExpoPushToTokens.mockResolvedValueOnce({ invalidTokens: ["ExponentPushToken[old]"] });
+
+    // eslint-disable-next-line @typescript-eslint/no-explicit-any
+    notify(mockPrisma as any, { recipientPetId: "pet-1", type: "BIRTHDAY" });
+    await flush();
+
+    expect(mockPrisma.pushToken.deleteMany).toHaveBeenCalledWith({ where: { token: { in: ["ExponentPushToken[old]"] } } });
+    expect(mockPrisma.owner.update).toHaveBeenCalledWith({ where: { id: "owner-1" }, data: { expoPushToken: null } });
+  });
+});
diff --git a/src/__tests__/owner.test.ts b/src/__tests__/owner.test.ts
index 2fc7e34..7f93412 100644
--- a/src/__tests__/owner.test.ts
+++ b/src/__tests__/owner.test.ts
@@ -163,20 +163,43 @@ describe("owner.setPetSuggestionsPreference", () => {
 });
 
 describe("owner.registerPushToken", () => {
-  it("upserts the Expo push token on the calling owner", async () => {
+  it("adds this device without touching other devices of the owner", async () => {
     const { caller, mockPrisma } = await createOwnerCaller();
     mockPrisma.owner.upsert.mockResolvedValue({ id: "owner-1" });
 
-    const result = await caller.owner.registerPushToken({ expoPushToken: "ExponentPushToken[abc]" });
+    const result = await caller.owner.registerPushToken({ expoPushToken: "ExponentPushToken[abc]", platform: "ios" });
 
-    expect(mockPrisma.owner.upsert).toHaveBeenCalledWith({
-      where: { id: "owner-1" },
-      create: { id: "owner-1", expoPushToken: "ExponentPushToken[abc]" },
-      update: { expoPushToken: "ExponentPushToken[abc]" },
+    expect(mockPrisma.pushToken.upsert).toHaveBeenCalledWith({
+      where: { token: "ExponentPushToken[abc]" },
+      create: { ownerId: "owner-1", token: "ExponentPushToken[abc]", platform: "ios" },
+      update: { ownerId: "owner-1", lastSeenAt: expect.any(Date), platform: "ios" },
     });
+    expect(mockPrisma.owner.upsert).toHaveBeenCalledWith(expect.objectContaining({ update: {} }));
     expect(result).toEqual({ ok: true });
   });
 
+  it("accepts older app versions without platform", async () => {
+    const { caller, mockPrisma } = await createOwnerCaller();
+    mockPrisma.owner.upsert.mockResolvedValue({ id: "owner-1" });
+
+    await caller.owner.registerPushToken({ expoPushToken: "ExponentPushToken[abc]" });
+
+    expect(mockPrisma.pushToken.upsert).toHaveBeenCalledWith(
+      expect.objectContaining({ create: expect.objectContaining({ platform: null }), update: { ownerId: "owner-1", lastSeenAt: expect.any(Date) } })
+    );
+  });
+
+  it("keeps only the ten most recently used devices", async () => {
+    const { caller, mockPrisma } = await createOwnerCaller();
+    mockPrisma.owner.upsert.mockResolvedValue({ id: "owner-1" });
+    mockPrisma.pushToken.findMany.mockResolvedValue([{ id: "old-1" }, { id: "old-2" }]);
+
+    await caller.owner.registerPushToken({ expoPushToken: "ExponentPushToken[new]" });
+
+    expect(mockPrisma.pushToken.findMany).toHaveBeenCalledWith(expect.objectContaining({ where: { ownerId: "owner-1" }, skip: 10 }));
+    expect(mockPrisma.pushToken.deleteMany).toHaveBeenCalledWith({ where: { id: { in: ["old-1", "old-2"] } } });
+  });
+
   it("rejects an empty token", async () => {
     const { caller } = await createOwnerCaller();
 
@@ -185,16 +208,27 @@ describe("owner.registerPushToken", () => {
 });
 
 describe("owner.clearPushToken", () => {
-  it("clears the stored token for the calling owner", async () => {
+  it("removes only this device on sign-out", async () => {
     const { caller, mockPrisma } = await createOwnerCaller();
-    mockPrisma.owner.updateMany.mockResolvedValue({ count: 1 });
+    mockPrisma.owner.updateMany.mockResolvedValue({ count: 0 });
 
-    const result = await caller.owner.clearPushToken();
+    const result = await caller.owner.clearPushToken({ expoPushToken: "ExponentPushToken[abc]" });
 
+    expect(mockPrisma.pushToken.deleteMany).toHaveBeenCalledWith({ where: { ownerId: "owner-1", token: "ExponentPushToken[abc]" } });
     expect(mockPrisma.owner.updateMany).toHaveBeenCalledWith({
-      where: { id: "owner-1" },
+      where: { id: "owner-1", expoPushToken: "ExponentPushToken[abc]" },
       data: { expoPushToken: null },
     });
     expect(result).toEqual({ ok: true });
   });
+
+  it("removes all devices of the owner without a token", async () => {
+    const { caller, mockPrisma } = await createOwnerCaller();
+    mockPrisma.owner.updateMany.mockResolvedValue({ count: 1 });
+
+    await caller.owner.clearPushToken();
+
+    expect(mockPrisma.pushToken.deleteMany).toHaveBeenCalledWith({ where: { ownerId: "owner-1" } });
+    expect(mockPrisma.owner.updateMany).toHaveBeenCalledWith({ where: { id: "owner-1" }, data: { expoPushToken: null } });
+  });
 });
diff --git a/src/__tests__/vaccine-reminders-cron.test.ts b/src/__tests__/vaccine-reminders-cron.test.ts
index ae2bba6..5946d4f 100644
--- a/src/__tests__/vaccine-reminders-cron.test.ts
+++ b/src/__tests__/vaccine-reminders-cron.test.ts
@@ -5,10 +5,10 @@
 import { describe, it, expect, vi, beforeEach } from "vitest";
 
 vi.mock("server-only", () => ({}));
-const { sendExpoPushNotification } = vi.hoisted(() => ({
-  sendExpoPushNotification: vi.fn().mockResolvedValue(undefined),
+const { sendExpoPushToTokens } = vi.hoisted(() => ({
+  sendExpoPushToTokens: vi.fn().mockResolvedValue({ invalidTokens: [] }),
 }));
-vi.mock("@/lib/push", () => ({ sendExpoPushNotification }));
+vi.mock("@/lib/push", () => ({ sendExpoPushToTokens }));
 
 import { createMockPrisma } from "@/__tests__/helpers/prisma-mock";
 
@@ -84,8 +84,8 @@ describe("sendVaccineReminders", () => {
     expect(mockPrisma.notification.create).toHaveBeenCalledWith({
       data: { recipientPetId: "pet-1", type: "VACCINE_DUE", vaccineId: "vac-1" },
     });
-    expect(sendExpoPushNotification).toHaveBeenCalledWith(
-      "ExponentPushToken[abc]",
+    expect(sendExpoPushToTokens).toHaveBeenCalledWith(
+      ["ExponentPushToken[abc]"],
       expect.objectContaining({
         title: "Impfung bald fällig",
         body: expect.stringContaining("„Tollwut“ für Bubi ist am 01.11.2026 fällig"),
@@ -101,12 +101,12 @@ describe("sendVaccineReminders", () => {
 
     expect(result.sent).toBe(0);
     expect(mockPrisma.notification.create).not.toHaveBeenCalled();
-    expect(sendExpoPushNotification).not.toHaveBeenCalled();
+    expect(sendExpoPushToTokens).not.toHaveBeenCalled();
   });
 
   it("still counts the reminder when the push fails", async () => {
     mockPrisma.vaccine.findMany.mockResolvedValue([dueVaccine]);
-    sendExpoPushNotification.mockRejectedValueOnce(new Error("expo down"));
+    sendExpoPushToTokens.mockRejectedValueOnce(new Error("expo down"));
     vi.spyOn(console, "error").mockImplementation(() => {});
     // eslint-disable-next-line @typescript-eslint/no-explicit-any
     const result = await sendVaccineReminders(mockPrisma as any, now);
diff --git a/src/lib/lost-reports.ts b/src/lib/lost-reports.ts
index 522d7ba..151c678 100644
--- a/src/lib/lost-reports.ts
+++ b/src/lib/lost-reports.ts
@@ -33,7 +33,7 @@ export function pickRecipientsPerOwner(ownerId: string, followers: PetRef[], fol
  * blockieren oder scheitern lassen. Gibt die Zahl der Empfänger zurück.
  */
 export async function notifyLostReportAudience(
-  prisma: Pick<PrismaClient, "follow" | "notification" | "pet" | "owner">,
+  prisma: Pick<PrismaClient, "follow" | "notification" | "pet" | "owner" | "pushToken">,
   pet: PetRef,
   type: "PET_LOST" | "PET_FOUND"
 ): Promise<number> {
diff --git a/src/lib/notify.ts b/src/lib/notify.ts
index a647c0a..2c28d9d 100644
--- a/src/lib/notify.ts
+++ b/src/lib/notify.ts
@@ -1,6 +1,6 @@
 import "server-only";
 import type { PrismaClient, NotificationType } from "@prisma/client";
-import { sendExpoPushNotification } from "@/lib/push";
+import { sendExpoPushToTokens } from "@/lib/push";
 
 interface NotifyParams {
   recipientPetId: string;
@@ -27,7 +27,7 @@ export type PushExtras = { conversationId?: string };
  * directly instead.
  */
 export function notify(
-  prisma: Pick<PrismaClient, "notification" | "pet" | "owner">,
+  prisma: Pick<PrismaClient, "notification" | "pet" | "owner" | "pushToken">,
   params: NotifyParams,
   extras?: PushExtras
 ): void {
@@ -68,7 +68,7 @@ const PUSH_COPY: Record<
 };
 
 /**
- * Best-effort Expo push to the recipient owner's registered device, if any.
+ * Best-effort Expo push to all of the recipient owner's registered devices, if any.
  * Separate from the in-app Notification row above — a missing/expired push
  * token, or the owner never having opened the mobile app, is the normal case
  * and must silently no-op rather than error.
@@ -80,7 +80,7 @@ const PUSH_COPY: Record<
  * vaccine name and due date for VACCINE_DUE).
  */
 export async function sendPushForNotification(
-  prisma: Pick<PrismaClient, "pet" | "owner">,
+  prisma: Pick<PrismaClient, "pet" | "owner" | "pushToken">,
   params: NotifyParams,
   bodyOverride?: string,
   extras?: PushExtras
@@ -91,18 +91,21 @@ export async function sendPushForNotification(
   });
   if (!recipientPet) return;
 
-  const owner = await prisma.owner.findUnique({
-    where: { id: recipientPet.ownerId },
-    select: { expoPushToken: true },
-  });
-  if (!owner?.expoPushToken) return;
+  // Alle Geräte des Halters (PushToken) plus der alte Einzel-Token aus der Zeit
+  // vor „Push an mehrere Geräte“, bis jedes Gerät sich neu registriert hat.
+  const [devices, owner] = await Promise.all([
+    prisma.pushToken.findMany({ where: { ownerId: recipientPet.ownerId }, select: { token: true } }),
+    prisma.owner.findUnique({ where: { id: recipientPet.ownerId }, select: { expoPushToken: true } }),
+  ]);
+  const tokens = [...new Set([...devices.map((d) => d.token), ...(owner?.expoPushToken ? [owner.expoPushToken] : [])])];
+  if (tokens.length === 0) return;
 
   const actorPet = params.actorPetId
     ? await prisma.pet.findUnique({ where: { id: params.actorPetId }, select: { name: true } })
     : null;
 
   const copy = PUSH_COPY[params.type];
-  await sendExpoPushNotification(owner.expoPushToken, {
+  const { invalidTokens } = await sendExpoPushToTokens(tokens, {
     title: copy.title,
     body: bodyOverride ?? (actorPet ? copy.actorBody(actorPet.name) : copy.genericBody),
     // Ziele für das Antippen der Push-Mitteilung (App: src/lib/notification-route.ts).
@@ -116,4 +119,12 @@ export async function sendPushForNotification(
       conversationId: extras?.conversationId ?? "",
     },
   });
+
+  // Deinstallierte Apps/abgelaufene Tokens aufräumen, damit sie nicht bei jeder Mitteilung erneut scheitern.
+  if (invalidTokens.length > 0) {
+    await prisma.pushToken.deleteMany({ where: { token: { in: invalidTokens } } });
+    if (owner?.expoPushToken && invalidTokens.includes(owner.expoPushToken)) {
+      await prisma.owner.update({ where: { id: recipientPet.ownerId }, data: { expoPushToken: null } });
+    }
+  }
 }
diff --git a/src/lib/push.test.ts b/src/lib/push.test.ts
new file mode 100644
index 0000000..c1803b5
--- /dev/null
+++ b/src/lib/push.test.ts
@@ -0,0 +1,39 @@
+import { describe, it, expect, vi, afterEach } from "vitest";
+
+vi.mock("server-only", () => ({}));
+import { sendExpoPushToTokens } from "@/lib/push";
+
+const payload = { title: "T", body: "B" };
+
+afterEach(() => vi.unstubAllGlobals());
+
+describe("sendExpoPushToTokens", () => {
+  it("sends one batched request and reports DeviceNotRegistered tokens", async () => {
+    const fetchMock = vi.fn().mockResolvedValue({
+      ok: true,
+      json: async () => ({ data: [{ status: "ok" }, { status: "error", details: { error: "DeviceNotRegistered" } }, { status: "error", details: { error: "MessageRateExceeded" } }] }),
+    });
+    vi.stubGlobal("fetch", fetchMock);
+
+    const result = await sendExpoPushToTokens(["a", "b", "c"], payload);
+
+    expect(fetchMock).toHaveBeenCalledTimes(1);
+    const body = JSON.parse(fetchMock.mock.calls[0]![1].body);
+    expect(body.map((m: { to: string }) => m.to)).toEqual(["a", "b", "c"]);
+    expect(result.invalidTokens).toEqual(["b"]);
+  });
+
+  it("splits more than 100 tokens into several requests", async () => {
+    const fetchMock = vi.fn().mockResolvedValue({ ok: true, json: async () => ({ data: [] }) });
+    vi.stubGlobal("fetch", fetchMock);
+
+    await sendExpoPushToTokens(Array.from({ length: 150 }, (_, i) => `t${i}`), payload);
+
+    expect(fetchMock).toHaveBeenCalledTimes(2);
+  });
+
+  it("throws on HTTP errors so the caller can log them", async () => {
+    vi.stubGlobal("fetch", vi.fn().mockResolvedValue({ ok: false, status: 503 }));
+    await expect(sendExpoPushToTokens(["a"], payload)).rejects.toThrow("503");
+  });
+});
diff --git a/src/lib/push.ts b/src/lib/push.ts
index d0f8191..c458efd 100644
--- a/src/lib/push.ts
+++ b/src/lib/push.ts
@@ -1,32 +1,45 @@
 import "server-only";
 
 const EXPO_PUSH_URL = "https://exp.host/--/api/v2/push/send";
+/** Expo nimmt höchstens 100 Nachrichten pro Anfrage an. */
+const EXPO_MAX_BATCH = 100;
 
-interface PushPayload {
+export interface PushPayload {
   title: string;
   body: string;
   data?: Record<string, string>;
 }
 
+interface ExpoTicket {
+  status: "ok" | "error";
+  details?: { error?: string };
+}
+
 /**
- * Sends one push through Expo's push service (no expo-server-sdk dependency
- * needed — it's a plain JSON POST). Never throws: callers (notify.ts) treat
- * push delivery as best-effort and must not let a failure here affect the
- * in-app notification it's paired with.
+ * Schickt dieselbe Push-Mitteilung an mehrere Geräte über Expos Push-Dienst
+ * (reiner JSON-POST, kein expo-server-sdk nötig). Liefert die Tokens zurück,
+ * die Expo als „DeviceNotRegistered“ meldet (App deinstalliert/Token abgelaufen) —
+ * der Aufrufer löscht sie. Wirft bei HTTP-Fehlern; notify.ts fängt das ab, weil
+ * Push immer nur „best effort“ neben der In-App-Mitteilung ist.
  */
-export async function sendExpoPushNotification(token: string, payload: PushPayload): Promise<void> {
-  const response = await fetch(EXPO_PUSH_URL, {
-    method: "POST",
-    headers: { "Content-Type": "application/json", Accept: "application/json" },
-    body: JSON.stringify({
-      to: token,
-      title: payload.title,
-      body: payload.body,
-      data: payload.data ?? {},
-      sound: "default",
-    }),
-  });
-  if (!response.ok) {
-    throw new Error(`Expo push request failed with status ${response.status}`);
+export async function sendExpoPushToTokens(tokens: string[], payload: PushPayload): Promise<{ invalidTokens: string[] }> {
+  const invalidTokens: string[] = [];
+  for (let i = 0; i < tokens.length; i += EXPO_MAX_BATCH) {
+    const batch = tokens.slice(i, i + EXPO_MAX_BATCH);
+    const response = await fetch(EXPO_PUSH_URL, {
+      method: "POST",
+      headers: { "Content-Type": "application/json", Accept: "application/json" },
+      body: JSON.stringify(
+        batch.map((to) => ({ to, title: payload.title, body: payload.body, data: payload.data ?? {}, sound: "default" }))
+      ),
+    });
+    if (!response.ok) {
+      throw new Error(`Expo push request failed with status ${response.status}`);
+    }
+    const json = (await response.json().catch(() => null)) as { data?: ExpoTicket[] } | null;
+    json?.data?.forEach((ticket, index) => {
+      if (ticket.status === "error" && ticket.details?.error === "DeviceNotRegistered") invalidTokens.push(batch[index]!);
+    });
   }
+  return { invalidTokens };
 }
diff --git a/src/lib/story-mentions.ts b/src/lib/story-mentions.ts
index 5b2cdb1..a9b5640 100644
--- a/src/lib/story-mentions.ts
+++ b/src/lib/story-mentions.ts
@@ -61,7 +61,7 @@ export async function filterMentionablePetIds(
  * nicht die eigenen Tiere des Erstellers.
  */
 export async function saveStoryMentions(
-  prisma: Pick<PrismaClient, "storyMention" | "notification" | "pet" | "owner">,
+  prisma: Pick<PrismaClient, "storyMention" | "notification" | "pet" | "owner" | "pushToken">,
   storyId: string,
   actorPetId: string,
   petIds: readonly string[],
@@ -95,7 +95,7 @@ export async function petsOfOtherOwners(
 
 /** Fire-and-forget wie notify() selbst — darf das Erstellen der Story nie scheitern lassen. */
 export function notifyStoryMentions(
-  prisma: Pick<PrismaClient, "notification" | "pet" | "owner">,
+  prisma: Pick<PrismaClient, "notification" | "pet" | "owner" | "pushToken">,
   storyId: string,
   actorPetId: string,
   petIds: readonly string[]
diff --git a/src/lib/vaccine-reminders.ts b/src/lib/vaccine-reminders.ts
index 5a548dd..59ec7be 100644
--- a/src/lib/vaccine-reminders.ts
+++ b/src/lib/vaccine-reminders.ts
@@ -8,7 +8,7 @@ export const VACCINE_REMINDER_LEAD_DAYS = 30;
 const MAX_REMINDERS_PER_RUN = 100;
 const DAY_MS = 24 * 60 * 60 * 1000;
 
-type ReminderPrisma = Pick<PrismaClient, "vaccine" | "notification" | "pet" | "owner">;
+type ReminderPrisma = Pick<PrismaClient, "vaccine" | "notification" | "pet" | "owner" | "pushToken">;
 
 export interface VaccineReminderResult {
   sent: number;
diff --git a/src/trpc/routers/lost-report-admin.ts b/src/trpc/routers/lost-report-admin.ts
index cc5ad6c..d8306c7 100644
--- a/src/trpc/routers/lost-report-admin.ts
+++ b/src/trpc/routers/lost-report-admin.ts
@@ -77,7 +77,7 @@ export const lostReportAdminRouter = router({
       await ctx.prisma.$transaction([
         input.mode === "DELETE"
           ? ctx.prisma.lostReport.delete({ where: { id: report.id } })
-          : ctx.prisma.lostReport.update({ where: { id: report.id }, data: { foundAt: report.foundAt ?? new Date() } }),
+          : ctx.prisma.lostReport.update({ where: { id: report.id }, data: { foundAt: report.foundAt ?? new Date(), contactPhone: null, contactEmail: null } }),
         // Abzeichen nur entfernen, wenn es diese Meldung war (aktive Meldung).
         ...(report.foundAt ? [] : [ctx.prisma.pet.update({ where: { id: report.petId }, data: { lostSince: null } })]),
         ctx.prisma.moderationLog.create({
diff --git a/src/trpc/routers/lost-reports.ts b/src/trpc/routers/lost-reports.ts
index fa72dde..fc334a6 100644
--- a/src/trpc/routers/lost-reports.ts
+++ b/src/trpc/routers/lost-reports.ts
@@ -137,7 +137,7 @@ export const lostReportsRouter = router({
       if (!active) throw new TRPCError({ code: "NOT_FOUND" });
 
       await ctx.prisma.$transaction([
-        ctx.prisma.lostReport.update({ where: { id: active.id }, data: { foundAt: new Date() } }),
+        ctx.prisma.lostReport.update({ where: { id: active.id }, data: { foundAt: new Date(), contactPhone: null, contactEmail: null } }), // Kontaktdaten nach dem Finden nicht weiter aufbewahren (Datensparsamkeit)
         ctx.prisma.pet.update({ where: { id: input.petId }, data: { lostSince: null } }),
       ]);
 
diff --git a/src/trpc/routers/owner.ts b/src/trpc/routers/owner.ts
index f3babbb..c82bb88 100644
--- a/src/trpc/routers/owner.ts
+++ b/src/trpc/routers/owner.ts
@@ -2,6 +2,9 @@ import "server-only";
 import { z } from "zod";
 import { router, protectedProcedure } from "@/trpc/init";
 
+/** Höchstens so viele Geräte pro Konto bekommen Push (die zuletzt genutzten). */
+const MAX_PUSH_DEVICES = 10;
+
 export const ownerRouter = router({
   getThemePreference: protectedProcedure.query(async ({ ctx }) => {
     const owner = await ctx.prisma.owner.findUnique({
@@ -67,25 +70,47 @@ export const ownerRouter = router({
       return { ok: true };
     }),
 
-  // Registers this device's Expo push token for the signed-in owner. Single
-  // device only (overwrites any previous token) — good enough until a device
-  // actually needs the app on two phones at once.
+  // Push an mehrere Geräte: trägt dieses Gerät (Expo-Push-Token) für den
+  // angemeldeten Halter ein. Der Token ist eindeutig — meldet sich auf demselben
+  // Handy ein anderes Konto an, wandert er dorthin. Ältere App-Versionen schicken
+  // keine Plattform mit; das ist erlaubt.
   registerPushToken: protectedProcedure
-    .input(z.object({ expoPushToken: z.string().min(1) }))
+    .input(z.object({ expoPushToken: z.string().min(1).max(200), platform: z.enum(["ios", "android"]).optional() }))
     .mutation(async ({ ctx, input }) => {
       await ctx.prisma.owner.upsert({
         where: { id: ctx.userId },
-        create: { id: ctx.userId, expoPushToken: input.expoPushToken, registrationIp: ctx.ip },
-        update: { expoPushToken: input.expoPushToken },
+        create: { id: ctx.userId, registrationIp: ctx.ip },
+        update: {},
       });
+      await ctx.prisma.pushToken.upsert({
+        where: { token: input.expoPushToken },
+        create: { ownerId: ctx.userId, token: input.expoPushToken, platform: input.platform ?? null },
+        update: { ownerId: ctx.userId, lastSeenAt: new Date(), ...(input.platform ? { platform: input.platform } : {}) },
+      });
+      // Nicht unbegrenzt sammeln: nur die zuletzt genutzten Geräte behalten.
+      const stale = await ctx.prisma.pushToken.findMany({
+        where: { ownerId: ctx.userId },
+        orderBy: { lastSeenAt: "desc" },
+        skip: MAX_PUSH_DEVICES,
+        select: { id: true },
+      });
+      if (stale.length > 0) {
+        await ctx.prisma.pushToken.deleteMany({ where: { id: { in: stale.map((t) => t.id) } } });
+      }
       return { ok: true };
     }),
 
-  clearPushToken: protectedProcedure.mutation(async ({ ctx }) => {
-    await ctx.prisma.owner.updateMany({
-      where: { id: ctx.userId },
-      data: { expoPushToken: null },
-    });
-    return { ok: true };
-  }),
+  // Beim Abmelden: nur dieses Gerät austragen (mit Token), sonst alle Geräte des Kontos.
+  clearPushToken: protectedProcedure
+    .input(z.object({ expoPushToken: z.string().min(1).max(200) }).optional())
+    .mutation(async ({ ctx, input }) => {
+      await ctx.prisma.pushToken.deleteMany({
+        where: { ownerId: ctx.userId, ...(input?.expoPushToken ? { token: input.expoPushToken } : {}) },
+      });
+      await ctx.prisma.owner.updateMany({
+        where: { id: ctx.userId, ...(input?.expoPushToken ? { expoPushToken: input.expoPushToken } : {}) },
+        data: { expoPushToken: null },
+      });
+      return { ok: true };
+    }),
 });