diff --git a/.github/workflows/debug.yml b/.github/workflows/debug.yml
index 7da49921..043d22ea 100644
--- a/.github/workflows/debug.yml
+++ b/.github/workflows/debug.yml
@@ -28,6 +28,30 @@ jobs:
         run: npm install typescript -g
       - name: Add Android targets for Rust
         run: rustup target add armv7-linux-androideabi aarch64-linux-android
+      - name: Prepare release keystore for Gradle signing
+        env:
+          SIGNING_KEY_BASE64: ${{ secrets.PS_BASE_64 }}
+          SIGNING_KEY_ALIAS: ${{ secrets.PS_RELEASE_KEY_ALIAS }}
+          SIGNING_KEY_PASSWORD: ${{ secrets.PS_RELEASE_KEY_PASSWORD }}
+          SIGNING_STORE_PASSWORD: ${{ secrets.PS_RELEASE_STORE_PASSWORD }}
+        run: |
+          set -euo pipefail
+          if [ -z "${SIGNING_KEY_BASE64}" ] || [ -z "${SIGNING_KEY_ALIAS}" ] || [ -z "${SIGNING_STORE_PASSWORD}" ] || [ -z "${SIGNING_KEY_PASSWORD}" ]; then
+            echo "Signing secrets are missing. Ensure PS_BASE_64, PS_RELEASE_KEY_ALIAS, PS_RELEASE_STORE_PASSWORD, PS_RELEASE_KEY_PASSWORD are set." >&2
+            exit 1
+          fi
+          mkdir -p "${HOME}/.android"
+          printf '%s' "${SIGNING_KEY_BASE64}" | base64 --decode > "${HOME}/.android/purrfectsnap-release.keystore"
+          if [ ! -s "${HOME}/.android/purrfectsnap-release.keystore" ]; then
+            echo "Decoded keystore is empty or invalid." >&2
+            exit 1
+          fi
+          mkdir -p "${HOME}/.gradle"
+          {
+            echo "PS_RELEASE_STORE_PASSWORD=${SIGNING_STORE_PASSWORD}"
+            echo "PS_RELEASE_KEY_ALIAS=${SIGNING_KEY_ALIAS}"
+            echo "PS_RELEASE_KEY_PASSWORD=${SIGNING_KEY_PASSWORD}"
+          } >> "${HOME}/.gradle/gradle.properties"
       - name: Build
         run: ./gradlew --configuration-cache assembleArmv8Debug
       - name: Determine the latest Build Tools version installed
@@ -102,6 +126,30 @@ jobs:
         run: npm install typescript -g
       - name: Add Android targets for Rust
         run: rustup target add armv7-linux-androideabi aarch64-linux-android
+      - name: Prepare release keystore for Gradle signing
+        env:
+          SIGNING_KEY_BASE64: ${{ secrets.PS_BASE_64 }}
+          SIGNING_KEY_ALIAS: ${{ secrets.PS_RELEASE_KEY_ALIAS }}
+          SIGNING_KEY_PASSWORD: ${{ secrets.PS_RELEASE_KEY_PASSWORD }}
+          SIGNING_STORE_PASSWORD: ${{ secrets.PS_RELEASE_STORE_PASSWORD }}
+        run: |
+          set -euo pipefail
+          if [ -z "${SIGNING_KEY_BASE64}" ] || [ -z "${SIGNING_KEY_ALIAS}" ] || [ -z "${SIGNING_STORE_PASSWORD}" ] || [ -z "${SIGNING_KEY_PASSWORD}" ]; then
+            echo "Signing secrets are missing. Ensure PS_BASE_64, PS_RELEASE_KEY_ALIAS, PS_RELEASE_STORE_PASSWORD, PS_RELEASE_KEY_PASSWORD are set." >&2
+            exit 1
+          fi
+          mkdir -p "${HOME}/.android"
+          printf '%s' "${SIGNING_KEY_BASE64}" | base64 --decode > "${HOME}/.android/purrfectsnap-release.keystore"
+          if [ ! -s "${HOME}/.android/purrfectsnap-release.keystore" ]; then
+            echo "Decoded keystore is empty or invalid." >&2
+            exit 1
+          fi
+          mkdir -p "${HOME}/.gradle"
+          {
+            echo "PS_RELEASE_STORE_PASSWORD=${SIGNING_STORE_PASSWORD}"
+            echo "PS_RELEASE_KEY_ALIAS=${SIGNING_KEY_ALIAS}"
+            echo "PS_RELEASE_KEY_PASSWORD=${SIGNING_KEY_PASSWORD}"
+          } >> "${HOME}/.gradle/gradle.properties"
       - name: Build
         run: ./gradlew --configuration-cache assembleArmv7Debug
       - name: Determine the latest Build Tools version installed
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index e89343af..0fca529f 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -28,6 +28,30 @@ jobs:
         run: npm install typescript -g
       - name: Add Android targets for Rust
         run: rustup target add armv7-linux-androideabi aarch64-linux-android
+      - name: Prepare release keystore for Gradle signing
+        env:
+          SIGNING_KEY_BASE64: ${{ secrets.PS_BASE_64 }}
+          SIGNING_KEY_ALIAS: ${{ secrets.PS_RELEASE_KEY_ALIAS }}
+          SIGNING_KEY_PASSWORD: ${{ secrets.PS_RELEASE_KEY_PASSWORD }}
+          SIGNING_STORE_PASSWORD: ${{ secrets.PS_RELEASE_STORE_PASSWORD }}
+        run: |
+          set -euo pipefail
+          if [ -z "${SIGNING_KEY_BASE64}" ] || [ -z "${SIGNING_KEY_ALIAS}" ] || [ -z "${SIGNING_STORE_PASSWORD}" ] || [ -z "${SIGNING_KEY_PASSWORD}" ]; then
+            echo "Signing secrets are missing. Ensure PS_BASE_64, PS_RELEASE_KEY_ALIAS, PS_RELEASE_STORE_PASSWORD, PS_RELEASE_KEY_PASSWORD are set." >&2
+            exit 1
+          fi
+          mkdir -p "${HOME}/.android"
+          printf '%s' "${SIGNING_KEY_BASE64}" | base64 --decode > "${HOME}/.android/purrfectsnap-release.keystore"
+          if [ ! -s "${HOME}/.android/purrfectsnap-release.keystore" ]; then
+            echo "Decoded keystore is empty or invalid." >&2
+            exit 1
+          fi
+          mkdir -p "${HOME}/.gradle"
+          {
+            echo "PS_RELEASE_STORE_PASSWORD=${SIGNING_STORE_PASSWORD}"
+            echo "PS_RELEASE_KEY_ALIAS=${SIGNING_KEY_ALIAS}"
+            echo "PS_RELEASE_KEY_PASSWORD=${SIGNING_KEY_PASSWORD}"
+          } >> "${HOME}/.gradle/gradle.properties"
       - name: Build
         run: ./gradlew --configuration-cache assembleArmv8Release
       - name: Determine the latest Build Tools version installed
@@ -102,6 +126,30 @@ jobs:
         run: npm install typescript -g
       - name: Add Android targets for Rust
         run: rustup target add armv7-linux-androideabi aarch64-linux-android
+      - name: Prepare release keystore for Gradle signing
+        env:
+          SIGNING_KEY_BASE64: ${{ secrets.PS_BASE_64 }}
+          SIGNING_KEY_ALIAS: ${{ secrets.PS_RELEASE_KEY_ALIAS }}
+          SIGNING_KEY_PASSWORD: ${{ secrets.PS_RELEASE_KEY_PASSWORD }}
+          SIGNING_STORE_PASSWORD: ${{ secrets.PS_RELEASE_STORE_PASSWORD }}
+        run: |
+          set -euo pipefail
+          if [ -z "${SIGNING_KEY_BASE64}" ] || [ -z "${SIGNING_KEY_ALIAS}" ] || [ -z "${SIGNING_STORE_PASSWORD}" ] || [ -z "${SIGNING_KEY_PASSWORD}" ]; then
+            echo "Signing secrets are missing. Ensure PS_BASE_64, PS_RELEASE_KEY_ALIAS, PS_RELEASE_STORE_PASSWORD, PS_RELEASE_KEY_PASSWORD are set." >&2
+            exit 1
+          fi
+          mkdir -p "${HOME}/.android"
+          printf '%s' "${SIGNING_KEY_BASE64}" | base64 --decode > "${HOME}/.android/purrfectsnap-release.keystore"
+          if [ ! -s "${HOME}/.android/purrfectsnap-release.keystore" ]; then
+            echo "Decoded keystore is empty or invalid." >&2
+            exit 1
+          fi
+          mkdir -p "${HOME}/.gradle"
+          {
+            echo "PS_RELEASE_STORE_PASSWORD=${SIGNING_STORE_PASSWORD}"
+            echo "PS_RELEASE_KEY_ALIAS=${SIGNING_KEY_ALIAS}"
+            echo "PS_RELEASE_KEY_PASSWORD=${SIGNING_KEY_PASSWORD}"
+          } >> "${HOME}/.gradle/gradle.properties"
       - name: Build
         run: ./gradlew --configuration-cache assembleArmv7Release
       - name: Determine the latest Build Tools version installed
diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index 3bccdf17..6cb2d76e 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -157,7 +157,12 @@ android {
         release {
             isMinifyEnabled = true
             proguardFiles += file("proguard-rules.pro")
-            signingConfig = signingConfigs.getByName("release")
+            val releaseStore = File(System.getProperty("user.home"), ".android/purrfectsnap-release.keystore")
+            val releaseStorePass = providers.gradleProperty("PS_RELEASE_STORE_PASSWORD").orNull
+            val releaseKeyAlias = providers.gradleProperty("PS_RELEASE_KEY_ALIAS").orNull
+            if (releaseStore.exists() && !releaseStorePass.isNullOrBlank() && !releaseKeyAlias.isNullOrBlank()) {
+                signingConfig = signingConfigs.getByName("release")
+            }
         }
         debug {
             (properties["debug_flavor"] == null).also {
diff --git a/app/src/main/kotlin/me/eternal/purrfectsnap/bridge/BiometricPromptActivity.kt b/app/src/main/kotlin/me/eternal/purrfectsnap/bridge/BiometricPromptActivity.kt
index c6f3f46e..158d7a11 100644
--- a/app/src/main/kotlin/me/eternal/purrfectsnap/bridge/BiometricPromptActivity.kt
+++ b/app/src/main/kotlin/me/eternal/purrfectsnap/bridge/BiometricPromptActivity.kt
@@ -1,3 +1,5 @@
+@file:Suppress("DEPRECATION")
+
 package me.eternal.purrfectsnap.bridge
 
 import android.content.Intent