diff --git a/app.config.js b/app.config.js
index 79dd1dc619..98d6931830 100644
--- a/app.config.js
+++ b/app.config.js
@@ -240,6 +240,7 @@ module.exports = function (_config) {
       plugins: [
         'expo-video',
         'expo-localization',
+        'expo-secure-store',
         'expo-web-browser',
         [
           'react-native-edge-to-edge',
diff --git a/jest/jestSetup.js b/jest/jestSetup.js
index ca04d54261..7f44a3e89e 100644
--- a/jest/jestSetup.js
+++ b/jest/jestSetup.js
@@ -28,6 +28,36 @@ jest.mock('react-native-safe-area-context', () => {
   }
 })
 
+jest.mock('react-native-mmkv', () => ({
+  MMKV: class MMKV {
+    _store = new Map()
+
+    set(key, value) {
+      this._store.set(key, value)
+    }
+
+    getString(key) {
+      return this._store.get(key)
+    }
+
+    delete(key) {
+      this._store.delete(key)
+    }
+
+    clearAll() {
+      this._store.clear()
+    }
+
+    getAllKeys() {
+      return Array.from(this._store.keys())
+    }
+
+    addOnValueChangedListener() {
+      return {remove: () => {}}
+    }
+  },
+}))
+
 jest.mock('expo-file-system/legacy', () => ({
   getInfoAsync: jest.fn().mockResolvedValue({exists: true, size: 100}),
   deleteAsync: jest.fn(),
@@ -57,6 +87,24 @@ jest.mock('expo-media-library', () => ({
   usePermissions: jest.fn(() => [true]),
 }))
 
+// the real module reads its constants off the native module at import time
+jest.mock('expo-secure-store', () => {
+  const store = new Map()
+  return {
+    getItem: jest.fn(key => store.get(key) ?? null),
+    setItem: jest.fn((key, value) => {
+      store.set(key, value)
+    }),
+    AFTER_FIRST_UNLOCK: 0,
+    AFTER_FIRST_UNLOCK_THIS_DEVICE_ONLY: 1,
+    ALWAYS: 2,
+    WHEN_PASSCODE_SET_THIS_DEVICE_ONLY: 3,
+    ALWAYS_THIS_DEVICE_ONLY: 4,
+    WHEN_UNLOCKED: 5,
+    WHEN_UNLOCKED_THIS_DEVICE_ONLY: 6,
+  }
+})
+
 jest.mock('@bsky.app/expo-guess-language', () => ({
   guessLanguageSync: jest
     .fn()
diff --git a/package.json b/package.json
index 7f2786e0a4..73561b05c8 100644
--- a/package.json
+++ b/package.json
@@ -194,6 +194,7 @@
     "expo-paste-input": "^0.2.1",
     "expo-privacy-sensitive": "^0.2.0",
     "expo-screen-orientation": "~9.0.8",
+    "expo-secure-store": "~15.0.8",
     "expo-sharing": "~14.0.8",
     "expo-sms": "^14.0.7",
     "expo-splash-screen": "~31.0.13",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index f24423953a..c90c6681da 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -526,6 +526,9 @@ importers:
       expo-screen-orientation:
         specifier: ~9.0.8
         version: 9.0.9(83f21d12a6c1aa99b4a65d070875cc68)
+      expo-secure-store:
+        specifier: ~15.0.8
+        version: 15.0.8(expo@54.0.35(@babel/core@7.29.0(supports-color@8.1.1))(react-native-webview@13.15.0(react-native@0.81.5(patch_hash=91fd85363059530dea649a5ca6012b933f79c8491737fbfdc685abc727e48403)(@babel/core@7.29.0(supports-color@8.1.1))(@react-native/metro-config@0.86.0(@babel/core@7.29.0(supports-color@8.1.1))(supports-color@8.1.1))(@types/react@19.1.17)(react@19.1.0)(supports-color@8.1.1))(react@19.1.0))(react-native@0.81.5(patch_hash=91fd85363059530dea649a5ca6012b933f79c8491737fbfdc685abc727e48403)(@babel/core@7.29.0(supports-color@8.1.1))(@react-native/metro-config@0.86.0(@babel/core@7.29.0(supports-color@8.1.1))(supports-color@8.1.1))(@types/react@19.1.17)(react@19.1.0)(supports-color@8.1.1))(react@19.1.0)(supports-color@8.1.1))
       expo-sharing:
         specifier: ~14.0.8
         version: 14.0.8(expo@54.0.35(@babel/core@7.29.0(supports-color@8.1.1))(react-native-webview@13.15.0(react-native@0.81.5(patch_hash=91fd85363059530dea649a5ca6012b933f79c8491737fbfdc685abc727e48403)(@babel/core@7.29.0(supports-color@8.1.1))(@react-native/metro-config@0.86.0(@babel/core@7.29.0(supports-color@8.1.1))(supports-color@8.1.1))(@types/react@19.1.17)(react@19.1.0)(supports-color@8.1.1))(react@19.1.0))(react-native@0.81.5(patch_hash=91fd85363059530dea649a5ca6012b933f79c8491737fbfdc685abc727e48403)(@babel/core@7.29.0(supports-color@8.1.1))(@react-native/metro-config@0.86.0(@babel/core@7.29.0(supports-color@8.1.1))(supports-color@8.1.1))(@types/react@19.1.17)(react@19.1.0)(supports-color@8.1.1))(react@19.1.0)(supports-color@8.1.1))
@@ -5581,6 +5584,11 @@ packages:
       expo: '*'
       react-native: '*'
 
+  expo-secure-store@15.0.8:
+    resolution: {integrity: sha512-lHnzvRajBu4u+P99+0GEMijQMFCOYpWRO4dWsXSuMt77+THPIGjzNvVKrGSl6mMrLsfVaKL8BpwYZLGlgA+zAw==}
+    peerDependencies:
+      expo: '*'
+
   expo-server@1.0.7:
     resolution: {integrity: sha512-mcmyML3oXcqFUXUxtdtCL1O00ztNI2v76d+MdniXRUgHNxIcHZ05zo+DqBaOOT6LQnPk4vA4YHqQl7iGUfRb3g==}
     engines: {node: '>=20.16.0'}
@@ -15168,6 +15176,10 @@ snapshots:
       expo: 54.0.35(@babel/core@7.29.0(supports-color@8.1.1))(react-native-webview@13.15.0(react-native@0.81.5(patch_hash=91fd85363059530dea649a5ca6012b933f79c8491737fbfdc685abc727e48403)(@babel/core@7.29.0(supports-color@8.1.1))(@react-native/metro-config@0.86.0(@babel/core@7.29.0(supports-color@8.1.1))(supports-color@8.1.1))(@types/react@19.1.17)(react@19.1.0)(supports-color@8.1.1))(react@19.1.0))(react-native@0.81.5(patch_hash=91fd85363059530dea649a5ca6012b933f79c8491737fbfdc685abc727e48403)(@babel/core@7.29.0(supports-color@8.1.1))(@react-native/metro-config@0.86.0(@babel/core@7.29.0(supports-color@8.1.1))(supports-color@8.1.1))(@types/react@19.1.17)(react@19.1.0)(supports-color@8.1.1))(react@19.1.0)(supports-color@8.1.1)
       react-native: 0.81.5(patch_hash=91fd85363059530dea649a5ca6012b933f79c8491737fbfdc685abc727e48403)(@babel/core@7.29.0(supports-color@8.1.1))(@react-native/metro-config@0.86.0(@babel/core@7.29.0(supports-color@8.1.1))(supports-color@8.1.1))(@types/react@19.1.17)(react@19.1.0)(supports-color@8.1.1)
 
+  expo-secure-store@15.0.8(expo@54.0.35(@babel/core@7.29.0(supports-color@8.1.1))(react-native-webview@13.15.0(react-native@0.81.5(patch_hash=91fd85363059530dea649a5ca6012b933f79c8491737fbfdc685abc727e48403)(@babel/core@7.29.0(supports-color@8.1.1))(@react-native/metro-config@0.86.0(@babel/core@7.29.0(supports-color@8.1.1))(supports-color@8.1.1))(@types/react@19.1.17)(react@19.1.0)(supports-color@8.1.1))(react@19.1.0))(react-native@0.81.5(patch_hash=91fd85363059530dea649a5ca6012b933f79c8491737fbfdc685abc727e48403)(@babel/core@7.29.0(supports-color@8.1.1))(@react-native/metro-config@0.86.0(@babel/core@7.29.0(supports-color@8.1.1))(supports-color@8.1.1))(@types/react@19.1.17)(react@19.1.0)(supports-color@8.1.1))(react@19.1.0)(supports-color@8.1.1)):
+    dependencies:
+      expo: 54.0.35(@babel/core@7.29.0(supports-color@8.1.1))(react-native-webview@13.15.0(react-native@0.81.5(patch_hash=91fd85363059530dea649a5ca6012b933f79c8491737fbfdc685abc727e48403)(@babel/core@7.29.0(supports-color@8.1.1))(@react-native/metro-config@0.86.0(@babel/core@7.29.0(supports-color@8.1.1))(supports-color@8.1.1))(@types/react@19.1.17)(react@19.1.0)(supports-color@8.1.1))(react@19.1.0))(react-native@0.81.5(patch_hash=91fd85363059530dea649a5ca6012b933f79c8491737fbfdc685abc727e48403)(@babel/core@7.29.0(supports-color@8.1.1))(@react-native/metro-config@0.86.0(@babel/core@7.29.0(supports-color@8.1.1))(supports-color@8.1.1))(@types/react@19.1.17)(react@19.1.0)(supports-color@8.1.1))(react@19.1.0)(supports-color@8.1.1)
+
   expo-server@1.0.7: {}
 
   expo-sharing@14.0.8(expo@54.0.35(@babel/core@7.29.0(supports-color@8.1.1))(react-native-webview@13.15.0(react-native@0.81.5(patch_hash=91fd85363059530dea649a5ca6012b933f79c8491737fbfdc685abc727e48403)(@babel/core@7.29.0(supports-color@8.1.1))(@react-native/metro-config@0.86.0(@babel/core@7.29.0(supports-color@8.1.1))(supports-color@8.1.1))(@types/react@19.1.17)(react@19.1.0)(supports-color@8.1.1))(react@19.1.0))(react-native@0.81.5(patch_hash=91fd85363059530dea649a5ca6012b933f79c8491737fbfdc685abc727e48403)(@babel/core@7.29.0(supports-color@8.1.1))(@react-native/metro-config@0.86.0(@babel/core@7.29.0(supports-color@8.1.1))(supports-color@8.1.1))(@types/react@19.1.17)(react@19.1.0)(supports-color@8.1.1))(react@19.1.0)(supports-color@8.1.1)):