diff --git a/core/presentation/build.gradle.kts b/core/presentation/build.gradle.kts
index 4fcf91320..bd4787c2c 100644
--- a/core/presentation/build.gradle.kts
+++ b/core/presentation/build.gradle.kts
@@ -47,6 +47,7 @@ kotlin {
         }
         androidMain.dependencies {
             implementation(libs.androidx.appcompat)
+            implementation(libs.androidx.biometric)
         }
         val androidHostTest by getting {
             dependencies {
diff --git a/core/presentation/src/androidHostTest/kotlin/com/softartdev/notedelight/presentation/signin/SignInViewModelTest.kt b/core/presentation/src/androidHostTest/kotlin/com/softartdev/notedelight/presentation/signin/SignInViewModelTest.kt
index f8bae95b2..346d1f7a4 100644
--- a/core/presentation/src/androidHostTest/kotlin/com/softartdev/notedelight/presentation/signin/SignInViewModelTest.kt
+++ b/core/presentation/src/androidHostTest/kotlin/com/softartdev/notedelight/presentation/signin/SignInViewModelTest.kt
@@ -5,6 +5,7 @@ import androidx.compose.ui.autofill.AutofillManager
 import app.cash.turbine.test
 import com.softartdev.notedelight.StubEditable
 import com.softartdev.notedelight.anyObject
+import com.softartdev.notedelight.interactor.BiometricAuthService
 import com.softartdev.notedelight.navigation.AppNavGraph
 import com.softartdev.notedelight.navigation.Router
 import com.softartdev.notedelight.presentation.MainDispatcherRule
@@ -29,12 +30,14 @@ class SignInViewModelTest {
     private val mockCheckPasswordUseCase = Mockito.mock(CheckPasswordUseCase::class.java)
     private val mockRouter = Mockito.mock(Router::class.java)
     private val mockAutofillManager = Mockito.mock(AutofillManager::class.java)
+    private val mockBiometricAuthService = Mockito.mock(BiometricAuthService::class.java)
     
     private lateinit var signInViewModel: SignInViewModel
 
     @Before
     fun setUp() {
-        signInViewModel = SignInViewModel(mockCheckPasswordUseCase, mockRouter)
+        Mockito.`when`(mockBiometricAuthService.isBiometricAvailable()).thenReturn(false)
+        signInViewModel = SignInViewModel(mockCheckPasswordUseCase, mockRouter, mockBiometricAuthService)
         signInViewModel.autofillManager = mockAutofillManager
     }
 
@@ -114,4 +117,4 @@ class SignInViewModelTest {
             cancelAndIgnoreRemainingEvents()
         }
     }
-}
\ No newline at end of file
+}
diff --git a/core/presentation/src/androidMain/kotlin/com/softartdev/notedelight/interactor/AndroidBiometricAuthService.kt b/core/presentation/src/androidMain/kotlin/com/softartdev/notedelight/interactor/AndroidBiometricAuthService.kt
new file mode 100644
index 000000000..5b2bbe2f9
--- /dev/null
+++ b/core/presentation/src/androidMain/kotlin/com/softartdev/notedelight/interactor/AndroidBiometricAuthService.kt
@@ -0,0 +1,66 @@
+package com.softartdev.notedelight.interactor
+
+import android.content.Context
+import androidx.biometric.BiometricManager
+import androidx.biometric.BiometricPrompt
+import androidx.fragment.app.FragmentActivity
+import androidx.core.content.ContextCompat
+import kotlinx.coroutines.suspendCancellableCoroutine
+import kotlin.coroutines.resume
+
+class AndroidBiometricAuthService(private val context: Context) : BiometricAuthService {
+
+    override suspend fun isBiometricAvailable(): Boolean {
+        val biometricManager = BiometricManager.from(context)
+        val authenticators = BiometricManager.Authenticators.BIOMETRIC_STRONG
+        return biometricManager.canAuthenticate(authenticators) == BiometricManager.BIOMETRIC_SUCCESS
+    }
+
+    override suspend fun authenticate(): BiometricAuthResult = suspendCancellableCoroutine { continuation ->
+        val activity = context.findActivity() as? FragmentActivity
+        if (activity == null) {
+            continuation.resume(BiometricAuthResult.FallbackToPassword)
+            return@suspendCancellableCoroutine
+        }
+        val promptInfo = BiometricPrompt.PromptInfo.Builder()
+            .setTitle("Biometric authentication")
+            .setSubtitle("Sign in to NoteDelight")
+            .setNegativeButtonText("Use password")
+            .build()
+        val biometricPrompt = BiometricPrompt(
+            activity,
+            ContextCompat.getMainExecutor(activity),
+            object : BiometricPrompt.AuthenticationCallback() {
+                override fun onAuthenticationSucceeded(result: BiometricPrompt.AuthenticationResult) {
+                    if (continuation.isActive) {
+                        continuation.resume(BiometricAuthResult.Success)
+                    }
+                }
+
+                override fun onAuthenticationFailed() {
+                    if (continuation.isActive) {
+                        continuation.resume(BiometricAuthResult.Failed)
+                    }
+                }
+
+                override fun onAuthenticationError(errorCode: Int, errString: CharSequence) {
+                    if (!continuation.isActive) return
+                    val authResult = when (errorCode) {
+                        BiometricPrompt.ERROR_NEGATIVE_BUTTON,
+                        BiometricPrompt.ERROR_USER_CANCELED,
+                        BiometricPrompt.ERROR_CANCELED -> BiometricAuthResult.FallbackToPassword
+                        else -> BiometricAuthResult.Failed
+                    }
+                    continuation.resume(authResult)
+                }
+            }
+        )
+        biometricPrompt.authenticate(promptInfo)
+    }
+}
+
+private tailrec fun Context.findActivity(): android.app.Activity? = when (this) {
+    is android.app.Activity -> this
+    is android.content.ContextWrapper -> baseContext.findActivity()
+    else -> null
+}
diff --git a/core/presentation/src/commonMain/kotlin/com/softartdev/notedelight/interactor/BiometricAuthService.kt b/core/presentation/src/commonMain/kotlin/com/softartdev/notedelight/interactor/BiometricAuthService.kt
new file mode 100644
index 000000000..0c957558d
--- /dev/null
+++ b/core/presentation/src/commonMain/kotlin/com/softartdev/notedelight/interactor/BiometricAuthService.kt
@@ -0,0 +1,12 @@
+package com.softartdev.notedelight.interactor
+
+interface BiometricAuthService {
+    suspend fun isBiometricAvailable(): Boolean
+    suspend fun authenticate(): BiometricAuthResult
+}
+
+sealed interface BiometricAuthResult {
+    data object Success : BiometricAuthResult
+    data object Failed : BiometricAuthResult
+    data object FallbackToPassword : BiometricAuthResult
+}
diff --git a/core/presentation/src/commonMain/kotlin/com/softartdev/notedelight/presentation/signin/SignInAction.kt b/core/presentation/src/commonMain/kotlin/com/softartdev/notedelight/presentation/signin/SignInAction.kt
index c26afadf5..3113b941a 100644
--- a/core/presentation/src/commonMain/kotlin/com/softartdev/notedelight/presentation/signin/SignInAction.kt
+++ b/core/presentation/src/commonMain/kotlin/com/softartdev/notedelight/presentation/signin/SignInAction.kt
@@ -3,4 +3,5 @@ package com.softartdev.notedelight.presentation.signin
 sealed interface SignInAction {
     data object OnSettingsClick : SignInAction
     data class OnSignInClick(val pass: CharSequence) : SignInAction
+    data object OnBiometricClick : SignInAction
 }
diff --git a/core/presentation/src/commonMain/kotlin/com/softartdev/notedelight/presentation/signin/SignInResult.kt b/core/presentation/src/commonMain/kotlin/com/softartdev/notedelight/presentation/signin/SignInResult.kt
index fb55778bb..ee3eff2f3 100644
--- a/core/presentation/src/commonMain/kotlin/com/softartdev/notedelight/presentation/signin/SignInResult.kt
+++ b/core/presentation/src/commonMain/kotlin/com/softartdev/notedelight/presentation/signin/SignInResult.kt
@@ -4,5 +4,10 @@ enum class SignInResult(val isError: Boolean = false) {
     ShowSignInForm,
     ShowProgress,
     ShowEmptyPassError(isError = true),
-    ShowIncorrectPassError(isError = true)
+    ShowIncorrectPassError(isError = true),
+    ShowBiometricAvailable,
+    ShowBiometricInProgress,
+    ShowBiometricSuccess,
+    ShowBiometricFailed(isError = true),
+    ShowBiometricFallbackToPassword
 }
diff --git a/core/presentation/src/commonMain/kotlin/com/softartdev/notedelight/presentation/signin/SignInViewModel.kt b/core/presentation/src/commonMain/kotlin/com/softartdev/notedelight/presentation/signin/SignInViewModel.kt
index fde142e82..64c0423d0 100644
--- a/core/presentation/src/commonMain/kotlin/com/softartdev/notedelight/presentation/signin/SignInViewModel.kt
+++ b/core/presentation/src/commonMain/kotlin/com/softartdev/notedelight/presentation/signin/SignInViewModel.kt
@@ -4,6 +4,8 @@ import androidx.compose.ui.autofill.AutofillManager
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import co.touchlab.kermit.Logger
+import com.softartdev.notedelight.interactor.BiometricAuthResult
+import com.softartdev.notedelight.interactor.BiometricAuthService
 import com.softartdev.notedelight.navigation.AppNavGraph
 import com.softartdev.notedelight.navigation.Router
 import com.softartdev.notedelight.usecase.crypt.CheckPasswordUseCase
@@ -14,7 +16,8 @@ import kotlinx.coroutines.launch
 
 class SignInViewModel(
     private val checkPasswordUseCase: CheckPasswordUseCase,
-    private val router: Router
+    private val router: Router,
+    private val biometricAuthService: BiometricAuthService
 ) : ViewModel() {
     private val logger = Logger.withTag(this@SignInViewModel::class.simpleName.toString())
     private val mutableStateFlow: MutableStateFlow<SignInResult> = MutableStateFlow(
@@ -23,9 +26,20 @@ class SignInViewModel(
     val stateFlow: StateFlow<SignInResult> = mutableStateFlow
     var autofillManager: AutofillManager? = null
 
+    init {
+        checkBiometricAvailability()
+    }
+
     fun onAction(action: SignInAction) = when (action) {
         is SignInAction.OnSettingsClick -> router.navigateClearingBackStack(AppNavGraph.Settings)
         is SignInAction.OnSignInClick -> signIn(action.pass)
+        is SignInAction.OnBiometricClick -> signInWithBiometric()
+    }
+
+    private fun checkBiometricAvailability() = viewModelScope.launch {
+        if (biometricAuthService.isBiometricAvailable()) {
+            mutableStateFlow.value = SignInResult.ShowBiometricAvailable
+        }
     }
 
     private fun signIn(pass: CharSequence) = viewModelScope.launch {
@@ -50,4 +64,25 @@ class SignInViewModel(
             CountingIdlingRes.decrement()
         }
     }
+
+    private fun signInWithBiometric() = viewModelScope.launch {
+        CountingIdlingRes.increment()
+        mutableStateFlow.value = SignInResult.ShowBiometricInProgress
+        try {
+            when (biometricAuthService.authenticate()) {
+                BiometricAuthResult.Success -> {
+                    router.navigateClearingBackStack(AppNavGraph.Main)
+                    mutableStateFlow.value = SignInResult.ShowBiometricSuccess
+                }
+                BiometricAuthResult.Failed -> mutableStateFlow.value = SignInResult.ShowBiometricFailed
+                BiometricAuthResult.FallbackToPassword ->
+                    mutableStateFlow.value = SignInResult.ShowBiometricFallbackToPassword
+            }
+        } catch (error: Throwable) {
+            logger.e(error) { "Error during biometric sign in" }
+            mutableStateFlow.value = SignInResult.ShowBiometricFallbackToPassword
+        } finally {
+            CountingIdlingRes.decrement()
+        }
+    }
 }
diff --git a/core/presentation/src/iosMain/kotlin/com/softartdev/notedelight/interactor/IosBiometricAuthService.kt b/core/presentation/src/iosMain/kotlin/com/softartdev/notedelight/interactor/IosBiometricAuthService.kt
new file mode 100644
index 000000000..a133ede96
--- /dev/null
+++ b/core/presentation/src/iosMain/kotlin/com/softartdev/notedelight/interactor/IosBiometricAuthService.kt
@@ -0,0 +1,42 @@
+package com.softartdev.notedelight.interactor
+
+import kotlinx.cinterop.ExperimentalForeignApi
+import kotlinx.cinterop.ObjCObjectVar
+import kotlinx.cinterop.alloc
+import kotlinx.cinterop.memScoped
+import kotlinx.coroutines.suspendCancellableCoroutine
+import platform.LocalAuthentication.LAContext
+import platform.LocalAuthentication.LAPolicyDeviceOwnerAuthenticationWithBiometrics
+import platform.LocalAuthentication.LAErrorUserCancel
+import platform.LocalAuthentication.LAErrorUserFallback
+import kotlin.coroutines.resume
+
+class IosBiometricAuthService : BiometricAuthService {
+
+    @OptIn(ExperimentalForeignApi::class)
+    override suspend fun isBiometricAvailable(): Boolean = memScoped {
+        val authContext = LAContext()
+        val errorPtr = alloc<ObjCObjectVar<platform.Foundation.NSError?>>()
+        authContext.canEvaluatePolicy(
+            policy = LAPolicyDeviceOwnerAuthenticationWithBiometrics,
+            error = errorPtr.ptr
+        )
+    }
+
+    override suspend fun authenticate(): BiometricAuthResult = suspendCancellableCoroutine { continuation ->
+        val authContext = LAContext()
+        authContext.evaluatePolicy(
+            policy = LAPolicyDeviceOwnerAuthenticationWithBiometrics,
+            localizedReason = "Authenticate to sign in"
+        ) { success, error ->
+            if (!continuation.isActive) return@evaluatePolicy
+            val result = when {
+                success -> BiometricAuthResult.Success
+                error?.code?.toInt() == LAErrorUserFallback || error?.code?.toInt() == LAErrorUserCancel ->
+                    BiometricAuthResult.FallbackToPassword
+                else -> BiometricAuthResult.Failed
+            }
+            continuation.resume(result)
+        }
+    }
+}
diff --git a/core/presentation/src/jvmMain/kotlin/com/softartdev/notedelight/interactor/JvmBiometricAuthService.kt b/core/presentation/src/jvmMain/kotlin/com/softartdev/notedelight/interactor/JvmBiometricAuthService.kt
new file mode 100644
index 000000000..54940111a
--- /dev/null
+++ b/core/presentation/src/jvmMain/kotlin/com/softartdev/notedelight/interactor/JvmBiometricAuthService.kt
@@ -0,0 +1,7 @@
+package com.softartdev.notedelight.interactor
+
+class JvmBiometricAuthService : BiometricAuthService {
+    override suspend fun isBiometricAvailable(): Boolean = false
+
+    override suspend fun authenticate(): BiometricAuthResult = BiometricAuthResult.FallbackToPassword
+}
diff --git a/core/presentation/src/wasmJsMain/kotlin/com/softartdev/notedelight/interactor/WasmJsBiometricAuthService.kt b/core/presentation/src/wasmJsMain/kotlin/com/softartdev/notedelight/interactor/WasmJsBiometricAuthService.kt
new file mode 100644
index 000000000..84a57497c
--- /dev/null
+++ b/core/presentation/src/wasmJsMain/kotlin/com/softartdev/notedelight/interactor/WasmJsBiometricAuthService.kt
@@ -0,0 +1,7 @@
+package com.softartdev.notedelight.interactor
+
+class WasmJsBiometricAuthService : BiometricAuthService {
+    override suspend fun isBiometricAvailable(): Boolean = false
+
+    override suspend fun authenticate(): BiometricAuthResult = BiometricAuthResult.FallbackToPassword
+}
diff --git a/core/ui/src/androidMain/kotlin/com/softartdev/notedelight/di/sharedModules.android.kt b/core/ui/src/androidMain/kotlin/com/softartdev/notedelight/di/sharedModules.android.kt
index 78455f5b6..52c78da89 100644
--- a/core/ui/src/androidMain/kotlin/com/softartdev/notedelight/di/sharedModules.android.kt
+++ b/core/ui/src/androidMain/kotlin/com/softartdev/notedelight/di/sharedModules.android.kt
@@ -1,6 +1,8 @@
 package com.softartdev.notedelight.di
 
 import android.content.Context
+import com.softartdev.notedelight.interactor.AndroidBiometricAuthService
+import com.softartdev.notedelight.interactor.BiometricAuthService
 import com.softartdev.notedelight.repository.AndroidFileRepo
 import com.softartdev.notedelight.repository.AndroidSafeRepo
 import com.softartdev.notedelight.repository.FileRepo
@@ -20,3 +22,6 @@ actual val repoModule: Module = module {
 
 actual fun Module.factoryOfAppVersionUseCase(): KoinDefinition<AppVersionUseCase> =
     factoryOf<AppVersionUseCase, Context>(constructor = ::AppVersionUseCase)
+
+actual fun Module.singleOfBiometricAuthService(): KoinDefinition<BiometricAuthService> =
+    factoryOf<BiometricAuthService, Context>(constructor = ::AndroidBiometricAuthService)
diff --git a/core/ui/src/commonMain/composeResources/values-ru/strings.xml b/core/ui/src/commonMain/composeResources/values-ru/strings.xml
index a75167cb1..7d8848a41 100644
--- a/core/ui/src/commonMain/composeResources/values-ru/strings.xml
+++ b/core/ui/src/commonMain/composeResources/values-ru/strings.xml
@@ -16,6 +16,7 @@
     <string name="note_save_change_dialog_message">Сохранить изменения?</string>
     <string name="note_empty">Заметка пуста. Введите данные.</string>
     <string name="sign_in">Войти</string>
+    <string name="sign_in_with_biometrics">Войти по биометрии</string>
     <string name="security">Безопасность</string>
     <string name="pref_title_enable_encryption">Включить шифрование</string>
     <string name="pref_title_set_password">Установить пароль</string>
@@ -33,6 +34,7 @@
     <string name="enter_new_password">Введите новый пароль</string>
     <string name="repeat_new_password">Повторите новый пароль</string>
     <string name="incorrect_password">Неверный пароль</string>
+    <string name="biometric_auth_failed">Сбой биометрии. Используйте пароль.</string>
     <string name="empty_password">Пароль не должен быть пустым</string>
     <string name="passwords_do_not_match">Пароли не совпадают</string>
     <string name="label_empty_result">Пока нет заметок</string>
diff --git a/core/ui/src/commonMain/composeResources/values/strings.xml b/core/ui/src/commonMain/composeResources/values/strings.xml
index d8fa04fa2..b123ae4a7 100644
--- a/core/ui/src/commonMain/composeResources/values/strings.xml
+++ b/core/ui/src/commonMain/composeResources/values/strings.xml
@@ -16,6 +16,7 @@
     <string name="note_save_change_dialog_message">Do you want to save the changes?</string>
     <string name="note_empty">The note is empty. Enter the data.</string>
     <string name="sign_in">Sign in</string>
+    <string name="sign_in_with_biometrics">Sign in with biometrics</string>
     <string name="security">Security</string>
     <string name="pref_title_enable_encryption">Enable encryption</string>
     <string name="pref_title_set_password">Set password</string>
@@ -33,6 +34,7 @@
     <string name="enter_new_password">Enter new password</string>
     <string name="repeat_new_password">Repeat new password</string>
     <string name="incorrect_password">Incorrect password</string>
+    <string name="biometric_auth_failed">Biometric auth failed. Use password.</string>
     <string name="empty_password">Password must not be empty</string>
     <string name="passwords_do_not_match">Passwords do not match</string>
     <string name="label_empty_result">No notes yet</string>
diff --git a/core/ui/src/commonMain/kotlin/com/softartdev/notedelight/di/sharedModules.kt b/core/ui/src/commonMain/kotlin/com/softartdev/notedelight/di/sharedModules.kt
index f02a0a16b..cb0ac7ba1 100644
--- a/core/ui/src/commonMain/kotlin/com/softartdev/notedelight/di/sharedModules.kt
+++ b/core/ui/src/commonMain/kotlin/com/softartdev/notedelight/di/sharedModules.kt
@@ -1,6 +1,7 @@
 package com.softartdev.notedelight.di
 
 import com.softartdev.notedelight.db.NoteDAO
+import com.softartdev.notedelight.interactor.BiometricAuthService
 import com.softartdev.notedelight.presentation.files.FilesViewModel
 import com.softartdev.notedelight.presentation.main.MainViewModel
 import com.softartdev.notedelight.presentation.note.DeleteViewModel
@@ -49,6 +50,7 @@ val daoModule: Module = module {
 }
 
 val useCaseModule: Module = module {
+    singleOfBiometricAuthService()
     factoryOf(::ChangePasswordUseCase)
     factoryOf(::CheckPasswordUseCase)
     factoryOf(::CheckSqlCipherVersionUseCase)
@@ -82,3 +84,4 @@ val viewModelModule: Module = module {
 }
 
 expect fun Module.factoryOfAppVersionUseCase(): KoinDefinition<AppVersionUseCase>
+expect fun Module.singleOfBiometricAuthService(): KoinDefinition<BiometricAuthService>
diff --git a/core/ui/src/commonMain/kotlin/com/softartdev/notedelight/ui/signin/SignInScreen.kt b/core/ui/src/commonMain/kotlin/com/softartdev/notedelight/ui/signin/SignInScreen.kt
index e6fc9572f..a6e6e422c 100644
--- a/core/ui/src/commonMain/kotlin/com/softartdev/notedelight/ui/signin/SignInScreen.kt
+++ b/core/ui/src/commonMain/kotlin/com/softartdev/notedelight/ui/signin/SignInScreen.kt
@@ -34,6 +34,7 @@ import com.softartdev.notedelight.presentation.signin.SignInResult
 import com.softartdev.notedelight.presentation.signin.SignInViewModel
 import com.softartdev.notedelight.ui.PasswordField
 import com.softartdev.notedelight.ui.TooltipIconButton
+import com.softartdev.notedelight.util.SIGN_IN_BIOMETRIC_BUTTON_TAG
 import com.softartdev.notedelight.util.SIGN_IN_BUTTON_TAG
 import com.softartdev.notedelight.util.SIGN_IN_PASSWORD_FIELD_TAG
 import com.softartdev.notedelight.util.SIGN_IN_PASSWORD_LABEL_TAG
@@ -41,11 +42,13 @@ import com.softartdev.notedelight.util.SIGN_IN_PASSWORD_VISIBILITY_TAG
 import com.softartdev.notedelight.util.SIGN_IN_SETTINGS_BUTTON_TAG
 import notedelight.core.ui.generated.resources.Res
 import notedelight.core.ui.generated.resources.app_name
+import notedelight.core.ui.generated.resources.biometric_auth_failed
 import notedelight.core.ui.generated.resources.empty_password
 import notedelight.core.ui.generated.resources.enter_password
 import notedelight.core.ui.generated.resources.incorrect_password
 import notedelight.core.ui.generated.resources.settings
 import notedelight.core.ui.generated.resources.sign_in
+import notedelight.core.ui.generated.resources.sign_in_with_biometrics
 import org.jetbrains.compose.resources.StringResource
 import org.jetbrains.compose.resources.stringResource
 
@@ -58,11 +61,20 @@ fun SignInScreen(signInViewModel: SignInViewModel) {
         signInViewModel.autofillManager = autofillManager
     }
     SignInScreenBody(
-        showLoading = signInResultState.value == SignInResult.ShowProgress,
+        showLoading = signInResultState.value == SignInResult.ShowProgress ||
+            signInResultState.value == SignInResult.ShowBiometricInProgress,
+        showBiometricButton = signInResultState.value in setOf(
+            SignInResult.ShowBiometricAvailable,
+            SignInResult.ShowBiometricInProgress,
+            SignInResult.ShowBiometricSuccess,
+            SignInResult.ShowBiometricFailed,
+            SignInResult.ShowBiometricFallbackToPassword
+        ),
         passwordState = passwordState,
         labelResource = when (signInResultState.value) {
             SignInResult.ShowEmptyPassError -> Res.string.empty_password
             SignInResult.ShowIncorrectPassError -> Res.string.incorrect_password
+            SignInResult.ShowBiometricFailed -> Res.string.biometric_auth_failed
             else -> Res.string.enter_password
         },
         isError = signInResultState.value.isError,
@@ -74,6 +86,7 @@ fun SignInScreen(signInViewModel: SignInViewModel) {
 @Composable
 fun SignInScreenBody(
     showLoading: Boolean = true,
+    showBiometricButton: Boolean = false,
     passwordState: MutableState<String> = mutableStateOf("password"),
     labelResource: StringResource = Res.string.enter_password,
     isError: Boolean = false,
@@ -117,10 +130,19 @@ fun SignInScreenBody(
                     .padding(top = 24.dp),
                 onClick = { onAction(SignInAction.OnSignInClick(passwordState.value)) },
             ) { Text(text = stringResource(Res.string.sign_in)) }
+            if (showBiometricButton) {
+                Button(
+                    modifier = Modifier
+                        .testTag(SIGN_IN_BIOMETRIC_BUTTON_TAG)
+                        .fillMaxWidth()
+                        .padding(top = 12.dp),
+                    onClick = { onAction(SignInAction.OnBiometricClick) },
+                ) { Text(text = stringResource(Res.string.sign_in_with_biometrics)) }
+            }
         }
     }
 }
 
 @Preview
 @Composable
-fun PreviewSignInScreen() = SignInScreenBody()
\ No newline at end of file
+fun PreviewSignInScreen() = SignInScreenBody()
diff --git a/core/ui/src/commonMain/kotlin/com/softartdev/notedelight/util/TestTags.kt b/core/ui/src/commonMain/kotlin/com/softartdev/notedelight/util/TestTags.kt
index d44e30a2a..76e8f38dc 100644
--- a/core/ui/src/commonMain/kotlin/com/softartdev/notedelight/util/TestTags.kt
+++ b/core/ui/src/commonMain/kotlin/com/softartdev/notedelight/util/TestTags.kt
@@ -8,6 +8,7 @@ const val SIGN_IN_PASSWORD_VISIBILITY_TAG = "SIGN_IN_PASSWORD_FIELD_VISIBILITY_T
 const val SIGN_IN_PASSWORD_FIELD_TAG = "SIGN_IN_PASSWORD_FIELD_TAG"
 const val SIGN_IN_SETTINGS_BUTTON_TAG = "SIGN_IN_SETTINGS_BUTTON_TAG"
 const val SIGN_IN_BUTTON_TAG = "SIGN_IN_BUTTON_TAG"
+const val SIGN_IN_BIOMETRIC_BUTTON_TAG = "SIGN_IN_BIOMETRIC_BUTTON_TAG"
 
 /**
  * Test tags for [com.softartdev.notedelight.ui.dialog.security.EnterPasswordDialog]
diff --git a/core/ui/src/iosMain/kotlin/com/softartdev/notedelight/di/sharedModules.ios.kt b/core/ui/src/iosMain/kotlin/com/softartdev/notedelight/di/sharedModules.ios.kt
index b863a0ca3..63dbf23ff 100644
--- a/core/ui/src/iosMain/kotlin/com/softartdev/notedelight/di/sharedModules.ios.kt
+++ b/core/ui/src/iosMain/kotlin/com/softartdev/notedelight/di/sharedModules.ios.kt
@@ -1,5 +1,7 @@
 package com.softartdev.notedelight.di
 
+import com.softartdev.notedelight.interactor.BiometricAuthService
+import com.softartdev.notedelight.interactor.IosBiometricAuthService
 import com.softartdev.notedelight.repository.FileRepo
 import com.softartdev.notedelight.repository.IosFileRepo
 import com.softartdev.notedelight.repository.IosSafeRepo
@@ -20,3 +22,6 @@ actual val repoModule: Module = module {
 actual fun Module.factoryOfAppVersionUseCase(): KoinDefinition<AppVersionUseCase> = factoryOf(
     constructor = ::AppVersionUseCase
 )
+
+actual fun Module.singleOfBiometricAuthService(): KoinDefinition<BiometricAuthService> =
+    factoryOf(constructor = ::IosBiometricAuthService)
diff --git a/core/ui/src/jvmMain/kotlin/com/softartdev/notedelight/di/sharedModules.jvm.kt b/core/ui/src/jvmMain/kotlin/com/softartdev/notedelight/di/sharedModules.jvm.kt
index 97070dd8d..dfff93396 100644
--- a/core/ui/src/jvmMain/kotlin/com/softartdev/notedelight/di/sharedModules.jvm.kt
+++ b/core/ui/src/jvmMain/kotlin/com/softartdev/notedelight/di/sharedModules.jvm.kt
@@ -1,5 +1,7 @@
 package com.softartdev.notedelight.di
 
+import com.softartdev.notedelight.interactor.BiometricAuthService
+import com.softartdev.notedelight.interactor.JvmBiometricAuthService
 import com.softartdev.notedelight.repository.FileRepo
 import com.softartdev.notedelight.repository.JvmFileRepo
 import com.softartdev.notedelight.repository.JvmSafeRepo
@@ -20,3 +22,7 @@ actual val repoModule: Module = module {
 actual fun Module.factoryOfAppVersionUseCase(): KoinDefinition<AppVersionUseCase> = factoryOf(
     constructor = ::AppVersionUseCase
 )
+
+actual fun Module.singleOfBiometricAuthService(): KoinDefinition<BiometricAuthService> = factoryOf(
+    constructor = ::JvmBiometricAuthService
+)
diff --git a/core/ui/src/wasmJsMain/kotlin/com/softartdev/notedelight/di/sharedModules.wasmJs.kt b/core/ui/src/wasmJsMain/kotlin/com/softartdev/notedelight/di/sharedModules.wasmJs.kt
index cabf9cbc2..7040e3652 100644
--- a/core/ui/src/wasmJsMain/kotlin/com/softartdev/notedelight/di/sharedModules.wasmJs.kt
+++ b/core/ui/src/wasmJsMain/kotlin/com/softartdev/notedelight/di/sharedModules.wasmJs.kt
@@ -1,5 +1,7 @@
 package com.softartdev.notedelight.di
 
+import com.softartdev.notedelight.interactor.BiometricAuthService
+import com.softartdev.notedelight.interactor.WasmJsBiometricAuthService
 import com.softartdev.notedelight.repository.FileRepo
 import com.softartdev.notedelight.repository.SafeRepo
 import com.softartdev.notedelight.repository.WasmJsFileRepo
@@ -20,3 +22,7 @@ actual val repoModule: Module = module {
 actual fun Module.factoryOfAppVersionUseCase(): KoinDefinition<AppVersionUseCase> = factoryOf(
     constructor = ::AppVersionUseCase
 )
+
+actual fun Module.singleOfBiometricAuthService(): KoinDefinition<BiometricAuthService> = factoryOf(
+    constructor = ::WasmJsBiometricAuthService
+)
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index ceac655ad..c96fbc9ec 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -24,6 +24,7 @@ composeMaterial3 = "1.9.0"
 composeMaterialIconsExtended = "1.7.3"
 composeMaterialAdaptive = "1.2.0"
 androidxAppcompat = "1.7.1"
+androidxBiometric = "1.4.0-alpha04"
 androidxViewModel = "2.10.0"
 androidxNavigation = "2.9.2"
 androidxNavigationEvent = "1.0.1"
@@ -120,6 +121,7 @@ compose-adaptive-layout = { module = "org.jetbrains.compose.material3.adaptive:a
 compose-adaptive-navigation = { module = "org.jetbrains.compose.material3.adaptive:adaptive-navigation", version.ref = "composeMaterialAdaptive" }
 
 androidx-appcompat = { module = "androidx.appcompat:appcompat", version.ref = "androidxAppcompat" }
+androidx-biometric = { module = "androidx.biometric:biometric", version.ref = "androidxBiometric" }
 androidx-navigation-compose = { module = "org.jetbrains.androidx.navigation:navigation-compose", version.ref = "androidxNavigation" }
 androidx-navigationevent-compose = { module = "org.jetbrains.androidx.navigationevent:navigationevent-compose", version.ref = "androidxNavigationEvent" }
 androidx-activity-compose = { module = "androidx.activity:activity-compose", version.ref = "androidxActivityCompose" }