diff --git a/.eslintignore b/.eslintignore
index e64e5ecea..a04dd0f0f 100644
--- a/.eslintignore
+++ b/.eslintignore
@@ -990,6 +990,12 @@ packages/app-mobile/components/SelectDateTimeDialog.js.map
 packages/app-mobile/components/SideMenu.d.ts
 packages/app-mobile/components/SideMenu.js
 packages/app-mobile/components/SideMenu.js.map
+packages/app-mobile/components/biometrics/BiometricPopup.d.ts
+packages/app-mobile/components/biometrics/BiometricPopup.js
+packages/app-mobile/components/biometrics/BiometricPopup.js.map
+packages/app-mobile/components/biometrics/sensorInfo.d.ts
+packages/app-mobile/components/biometrics/sensorInfo.js
+packages/app-mobile/components/biometrics/sensorInfo.js.map
 packages/app-mobile/components/getResponsiveValue.d.ts
 packages/app-mobile/components/getResponsiveValue.js
 packages/app-mobile/components/getResponsiveValue.js.map
diff --git a/.gitignore b/.gitignore
index 1d1b9de1a..f71d922ab 100644
--- a/.gitignore
+++ b/.gitignore
@@ -978,6 +978,12 @@ packages/app-mobile/components/SelectDateTimeDialog.js.map
 packages/app-mobile/components/SideMenu.d.ts
 packages/app-mobile/components/SideMenu.js
 packages/app-mobile/components/SideMenu.js.map
+packages/app-mobile/components/biometrics/BiometricPopup.d.ts
+packages/app-mobile/components/biometrics/BiometricPopup.js
+packages/app-mobile/components/biometrics/BiometricPopup.js.map
+packages/app-mobile/components/biometrics/sensorInfo.d.ts
+packages/app-mobile/components/biometrics/sensorInfo.js
+packages/app-mobile/components/biometrics/sensorInfo.js.map
 packages/app-mobile/components/getResponsiveValue.d.ts
 packages/app-mobile/components/getResponsiveValue.js
 packages/app-mobile/components/getResponsiveValue.js.map
diff --git a/packages/app-mobile/android/app/src/main/AndroidManifest.xml b/packages/app-mobile/android/app/src/main/AndroidManifest.xml
index c590d1a7b..dbdcd8303 100644
--- a/packages/app-mobile/android/app/src/main/AndroidManifest.xml
+++ b/packages/app-mobile/android/app/src/main/AndroidManifest.xml
@@ -7,6 +7,7 @@
 	<uses-permission android:name="android.permission.CAMERA" />
 	<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
 	<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
+	<uses-permission android:name="android.permission.USE_BIOMETRIC" />
 
 	<!-- Make these features optional to enable Chromebooks -->
 	<!-- https://github.com/laurent22/joplin/issues/37 -->
diff --git a/packages/app-mobile/android/build.gradle b/packages/app-mobile/android/build.gradle
index 93b640201..c90394821 100644
--- a/packages/app-mobile/android/build.gradle
+++ b/packages/app-mobile/android/build.gradle
@@ -46,6 +46,11 @@ allprojects {
                 excludeGroup "com.facebook.react"
             }
         }
+        maven {
+            // Required by react-native-fingerprint-scanner
+            // https://github.com/hieuvp/react-native-fingerprint-scanner/issues/192
+            url "https://maven.aliyun.com/repository/jcenter"
+        }
         google()
         maven { url 'https://www.jitpack.io' }
     }
diff --git a/packages/app-mobile/components/biometrics/BiometricPopup.tsx b/packages/app-mobile/components/biometrics/BiometricPopup.tsx
new file mode 100644
index 000000000..db501bdfb
--- /dev/null
+++ b/packages/app-mobile/components/biometrics/BiometricPopup.tsx
@@ -0,0 +1,89 @@
+const React = require('react');
+import Setting from '@joplin/lib/models/Setting';
+import { useEffect, useMemo, useState } from 'react';
+import { View, Dimensions, Alert, Button } from 'react-native';
+import FingerprintScanner from 'react-native-fingerprint-scanner';
+import { SensorInfo } from './sensorInfo';
+import { _ } from '@joplin/lib/locale';
+
+interface Props {
+	themeId: number;
+	sensorInfo: SensorInfo;
+}
+
+export default (props: Props) => {
+	const [initialPromptDone, setInitialPromptDone] = useState(false); // Setting.value('security.biometricsInitialPromptDone'));
+	const [display, setDisplay] = useState(!!props.sensorInfo.supportedSensors && (props.sensorInfo.enabled || !initialPromptDone));
+	const [tryBiometricsCheck, setTryBiometricsCheck] = useState(initialPromptDone);
+
+	useEffect(() => {
+		if (!display || !tryBiometricsCheck) return;
+
+		const biometricsCheck = async () => {
+			try {
+				await FingerprintScanner.authenticate({ description: _('Verify your identity') });
+				setTryBiometricsCheck(false);
+				setDisplay(false);
+			} catch (error) {
+				Alert.alert(_('Could not verify your identify'), error.message);
+				setTryBiometricsCheck(false);
+			} finally {
+				FingerprintScanner.release();
+			}
+		};
+
+		void biometricsCheck();
+	}, [display, tryBiometricsCheck]);
+
+	useEffect(() => {
+		if (initialPromptDone) return;
+		if (!display) return;
+
+		const complete = (enableBiometrics: boolean) => {
+			setInitialPromptDone(true);
+			Setting.setValue('security.biometricsInitialPromptDone', true);
+			Setting.setValue('security.biometricsEnabled', enableBiometrics);
+			if (!enableBiometrics) {
+				setDisplay(false);
+				setTryBiometricsCheck(false);
+			} else {
+				setTryBiometricsCheck(true);
+			}
+		};
+
+		Alert.alert(
+			_('Enable biometrics authentication?'),
+			_('Use your biometrics to secure access to your application. You can always set it up later in Settings.'),
+			[
+				{
+					text: _('Enable'),
+					onPress: () => complete(true),
+					style: 'default',
+				},
+				{
+					text: _('Not now'),
+					onPress: () => complete(false),
+					style: 'cancel',
+				},
+			]
+		);
+	}, [initialPromptDone, props.sensorInfo.supportedSensors, display]);
+
+	const windowSize = useMemo(() => {
+		return {
+			width: Dimensions.get('window').width,
+			height: Dimensions.get('window').height,
+		};
+	}, []);
+
+	const renderTryAgainButton = () => {
+		if (!display || tryBiometricsCheck || !initialPromptDone) return null;
+		return <Button title={_('Try again')} onPress={() => setTryBiometricsCheck(true)} />;
+	};
+
+	return (
+		<View style={{ display: display ? 'flex' : 'none', position: 'absolute', zIndex: 99999, backgroundColor: '#000000', width: windowSize.width, height: windowSize.height }}>
+			{renderTryAgainButton()}
+		</View>
+	);
+};
diff --git a/packages/app-mobile/components/biometrics/sensorInfo.ts b/packages/app-mobile/components/biometrics/sensorInfo.ts
new file mode 100644
index 000000000..f0e2d7177
--- /dev/null
+++ b/packages/app-mobile/components/biometrics/sensorInfo.ts
@@ -0,0 +1,37 @@
+import Setting from '@joplin/lib/models/Setting';
+import FingerprintScanner from 'react-native-fingerprint-scanner';
+
+export interface SensorInfo {
+	enabled: boolean;
+	sensorsHaveChanged: boolean;
+	supportedSensors: string;
+}
+
+export default async (): Promise<SensorInfo> => {
+	const enabled = Setting.value('security.biometricsEnabled');
+	let hasChanged = false;
+	let supportedSensors = '';
+
+	if (enabled) {
+		try {
+			const result = await FingerprintScanner.isSensorAvailable();
+			supportedSensors = result;
+
+			if (result) {
+				if (result !== Setting.value('security.biometricsSupportedSensors')) {
+					hasChanged = true;
+					Setting.setValue('security.biometricsSupportedSensors', result);
+				}
+			}
+		} catch (error) {
+			console.warn('Could not check for biometrics sensor:', error);
+			Setting.setValue('security.biometricsSupportedSensors', '');
+		}
+	}
+
+	return {
+		enabled,
+		sensorsHaveChanged: hasChanged,
+		supportedSensors,
+	};
+};
diff --git a/packages/app-mobile/ios/Joplin/Info.plist b/packages/app-mobile/ios/Joplin/Info.plist
index 8eabc8cc4..fa3fe4d9e 100644
--- a/packages/app-mobile/ios/Joplin/Info.plist
+++ b/packages/app-mobile/ios/Joplin/Info.plist
@@ -107,5 +107,7 @@
 	<string>Light</string>
 	<key>UIViewControllerBasedStatusBarAppearance</key>
 	<false/>
+	<key>NSFaceIDUsageDescription</key>
+	<string>$(PRODUCT_NAME) requires FaceID access to secure access to the application</string>
 </dict>
 </plist>
diff --git a/packages/app-mobile/ios/Podfile.lock b/packages/app-mobile/ios/Podfile.lock
index 2ae2ec7f6..f2eb213fd 100644
--- a/packages/app-mobile/ios/Podfile.lock
+++ b/packages/app-mobile/ios/Podfile.lock
@@ -234,6 +234,8 @@ PODS:
     - React-Core
   - react-native-document-picker (8.1.3):
     - React-Core
+  - react-native-fingerprint-scanner (6.0.0):
+    - React
   - react-native-geolocation (2.1.0):
     - React-Core
   - react-native-get-random-values (1.8.0):
@@ -367,6 +369,7 @@ DEPENDENCIES:
   - react-native-alarm-notification (from `../node_modules/joplin-rn-alarm-notification`)
   - react-native-camera (from `../node_modules/react-native-camera`)
   - react-native-document-picker (from `../node_modules/react-native-document-picker`)
+  - react-native-fingerprint-scanner (from `../node_modules/react-native-fingerprint-scanner`)
   - "react-native-geolocation (from `../node_modules/@react-native-community/geolocation`)"
   - react-native-get-random-values (from `../node_modules/react-native-get-random-values`)
   - react-native-image-picker (from `../node_modules/react-native-image-picker`)
@@ -452,6 +455,8 @@ EXTERNAL SOURCES:
     :path: "../node_modules/react-native-camera"
   react-native-document-picker:
     :path: "../node_modules/react-native-document-picker"
+  react-native-fingerprint-scanner:
+    :path: "../node_modules/react-native-fingerprint-scanner"
   react-native-geolocation:
     :path: "../node_modules/@react-native-community/geolocation"
   react-native-get-random-values:
@@ -544,6 +549,7 @@ SPEC CHECKSUMS:
   react-native-alarm-notification: 4e150e89c1707e057bc5e8c87ab005f1ea4b8d52
   react-native-camera: 3eae183c1d111103963f3dd913b65d01aef8110f
   react-native-document-picker: 958e2bc82e128be69055be261aeac8d872c8d34c
+  react-native-fingerprint-scanner: ac6656f18c8e45a7459302b84da41a44ad96dbbe
   react-native-geolocation: 69f4fd37650b8e7fee91816d395e62dd16f5ab8d
   react-native-get-random-values: a6ea6a8a65dc93e96e24a11105b1a9c8cfe1d72a
   react-native-image-picker: 60f4246eb5bb7187fc15638a8c1f13abd3820695
diff --git a/packages/app-mobile/package.json b/packages/app-mobile/package.json
index 8a27303dc..709fe1056 100644
--- a/packages/app-mobile/package.json
+++ b/packages/app-mobile/package.json
@@ -45,6 +45,7 @@
     "react-native-document-picker": "8.1.3",
     "react-native-dropdownalert": "4.5.1",
     "react-native-file-viewer": "2.1.5",
+    "react-native-fingerprint-scanner": "6.0.0",
     "react-native-fs": "2.20.0",
     "react-native-get-random-values": "1.8.0",
     "react-native-image-picker": "4.10.3",
diff --git a/packages/app-mobile/root.tsx b/packages/app-mobile/root.tsx
index 99e518a71..34b08872e 100644
--- a/packages/app-mobile/root.tsx
+++ b/packages/app-mobile/root.tsx
@@ -83,6 +83,7 @@ const SyncTargetNextcloud = require('@joplin/lib/SyncTargetNextcloud.js');
 const SyncTargetWebDAV = require('@joplin/lib/SyncTargetWebDAV.js');
 const SyncTargetDropbox = require('@joplin/lib/SyncTargetDropbox.js');
 const SyncTargetAmazonS3 = require('@joplin/lib/SyncTargetAmazonS3.js');
+import BiometricPopup from './components/biometrics/BiometricPopup';
 
 SyncTargetRegistry.addClass(SyncTargetNone);
 SyncTargetRegistry.addClass(SyncTargetOneDrive);
@@ -108,6 +109,7 @@ import { setRSA } from '@joplin/lib/services/e2ee/ppk';
 import RSA from './services/e2ee/RSA.react-native';
 import { runIntegrationTests } from '@joplin/lib/services/e2ee/ppkTestUtils';
 import { AppState } from './utils/types';
+import sensorInfo from './components/biometrics/sensorInfo';
 
 let storeDispatch = function(_action: any) {};
 
@@ -690,6 +692,7 @@ class AppComponent extends React.Component {
 		this.state = {
 			sideMenuContentOpacity: new Animated.Value(0),
 			sideMenuWidth: this.getSideMenuWidth(),
+			sensorInfo: null,
 		};
 
 		this.lastSyncStarted_ = defaultState.syncStarted;
@@ -760,6 +763,8 @@ class AppComponent extends React.Component {
 
 			await initialize(this.props.dispatch);
 
+			this.setState({ sensorInfo: await sensorInfo() });
+
 			this.props.dispatch({
 				type: 'APP_STATE_SET',
 				state: 'ready',
@@ -931,6 +936,10 @@ class AppComponent extends React.Component {
 							</View>
 							<DropdownAlert ref={(ref: any) => this.dropdownAlert_ = ref} tapToCloseEnabled={true} />
 							<Animated.View pointerEvents='none' style={{ position: 'absolute', backgroundColor: 'black', opacity: this.state.sideMenuContentOpacity, width: '100%', height: '120%' }}/>
+							<BiometricPopup
+								themeId={this.props.themeId}
+								sensorInfo={this.state.sensorInfo}
+							/>
 						</SafeAreaView>
 					</MenuContext>
 				</SideMenu>
diff --git a/packages/lib/models/Setting.ts b/packages/lib/models/Setting.ts
index 28f074efc..813144747 100644
--- a/packages/lib/models/Setting.ts
+++ b/packages/lib/models/Setting.ts
@@ -1611,6 +1611,28 @@ class Setting extends BaseModel {
 				storage: SettingStorage.Database,
 			},
 
+			'security.biometricsEnabled': {
+				value: false,
+				type: SettingItemType.Bool,
+				label: () => _('Use biometrics to secure access to the app'),
+				public: true,
+				appTypes: [AppType.Mobile],
+			},
+
+			'security.biometricsSupportedSensors': {
+				value: '',
+				type: SettingItemType.String,
+				public: false,
+				appTypes: [AppType.Mobile],
+			},
+
+			'security.biometricsInitialPromptDone': {
+				value: false,
+				type: SettingItemType.Bool,
+				public: false,
+				appTypes: [AppType.Mobile],
+			},
+
 			// 'featureFlag.syncAccurateTimestamps': {
 			// 	value: false,
 			// 	type: SettingItemType.Bool,
diff --git a/yarn.lock b/yarn.lock
index 248ca66c8..e8b6d9af2 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -4725,6 +4725,7 @@ __metadata:
     react-native-document-picker: 8.1.3
     react-native-dropdownalert: 4.5.1
     react-native-file-viewer: 2.1.5
+    react-native-fingerprint-scanner: ^6.0.0
     react-native-fs: 2.20.0
     react-native-get-random-values: 1.8.0
     react-native-image-picker: 4.10.3
@@ -27611,6 +27612,15 @@ __metadata:
   languageName: node
   linkType: hard
 
+"react-native-fingerprint-scanner@npm:^6.0.0":
+  version: 6.0.0
+  resolution: "react-native-fingerprint-scanner@npm:6.0.0"
+  peerDependencies:
+    react-native: ">=0.60 <1.0.0"
+  checksum: 67e1dcbf20d1a6119db4667162ff87c6ba606132c0cda790ef5c4d315e403f3253f8f4827373313562a261fca2d7cb77c8598f5f32d805ac07956b5301bce238
+  languageName: node
+  linkType: hard
+
 "react-native-fs@npm:2.20.0":
   version: 2.20.0
   resolution: "react-native-fs@npm:2.20.0"