diff --git a/.github/workflows/build-nightly-apk.yml b/.github/workflows/build-nightly-apk.yml
new file mode 100644
index 00000000..e2ed28bf
--- /dev/null
+++ b/.github/workflows/build-nightly-apk.yml
@@ -0,0 +1,150 @@
+name: Nightly build
+
+on:
+  schedule:
+    - cron: "30 1 * * *"
+  workflow_dispatch:
+
+jobs:
+  prepare:
+    name: Prepare build environment
+    runs-on: self-hosted
+    outputs:
+      hasNewChanges: ${{ steps.nightly.outputs.hasNewChanges }}
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+          clean: false
+      - name: Set executable permissions to gradlew
+        run: chmod +x ./gradlew
+      - name: Setup Python
+        uses: actions/setup-python@v2
+      - name: Install packages
+        uses: BSFishy/pip-action@v1
+        with:
+          packages: |
+            python-dotenv
+            pycryptodome
+            mysql-connector-python
+            requests
+      - name: Bump nightly version
+        id: nightly
+        run: python $GITHUB_WORKSPACE/.github/utils/bump_nightly.py $GITHUB_WORKSPACE
+      - name: Write signing passwords
+        if: steps.nightly.outputs.hasNewChanges
+        env:
+          DB_HOST: ${{ secrets.DB_HOST }}
+          DB_USER: ${{ secrets.DB_USER }}
+          DB_PASS: ${{ secrets.DB_PASS }}
+          DB_NAME: ${{ secrets.DB_NAME }}
+        run: python $GITHUB_WORKSPACE/.github/utils/sign.py $GITHUB_WORKSPACE commit
+  build:
+    name: Build APK
+    runs-on: self-hosted
+    needs:
+      - prepare
+    if: needs.prepare.outputs.hasNewChanges
+    outputs:
+      androidHome: ${{ env.ANDROID_HOME }}
+      androidSdkRoot: ${{ env.ANDROID_SDK_ROOT }}
+    steps:
+      - name: Setup JDK 1.8
+        uses: actions/setup-java@v1
+        with:
+          java-version: 1.8
+      - name: Setup Android SDK
+        uses: android-actions/setup-android@v2
+      - name: Clean build artifacts
+        run: |
+          rm -rf app/release/*
+          rm -rf app/build/outputs/apk/*
+          rm -rf app/build/outputs/bundle/*
+      - name: Assemble official release with Gradle
+        run: ./gradlew assembleOfficialRelease
+  sign:
+    name: Sign APK
+    runs-on: self-hosted
+    needs:
+      - build
+    outputs:
+      signedReleaseFile: ${{ steps.artifacts.outputs.signedReleaseFile }}
+      signedReleaseFileRelative: ${{ steps.artifacts.outputs.signedReleaseFileRelative }}
+    steps:
+      - name: Sign build artifacts
+        id: sign_app
+        uses: r0adkll/sign-android-release@v1
+        with:
+          releaseDirectory: app/release
+          signingKeyBase64: ${{ secrets.KEY_STORE }}
+          alias: ${{ secrets.KEY_ALIAS }}
+          keyStorePassword: ${{ secrets.KEY_STORE_PASSWORD }}
+          keyPassword: ${{ secrets.KEY_ALIAS_PASSWORD }}
+        env:
+          ANDROID_HOME: ${{ needs.build.outputs.androidHome }}
+          ANDROID_SDK_ROOT: ${{ needs.build.outputs.androidSdkRoot }}
+          BUILD_TOOLS_VERSION: "30.0.2"
+      - name: Rename signed artifacts
+        id: artifacts
+        run: python $GITHUB_WORKSPACE/.github/utils/rename_artifacts.py $GITHUB_WORKSPACE
+  publish:
+    name: Publish APK
+    runs-on: self-hosted
+    needs:
+      - sign
+    steps:
+      - name: Setup Python
+        uses: actions/setup-python@v2
+
+      - name: Extract changelogs
+        id: changelog
+        run: python $GITHUB_WORKSPACE/.github/utils/extract_changelogs.py $GITHUB_WORKSPACE
+
+      - name: Upload APK to SFTP
+        uses: easingthemes/ssh-deploy@v2.1.6
+        env:
+          REMOTE_HOST: ${{ secrets.SSH_IP }}
+          REMOTE_USER: ${{ secrets.SSH_USERNAME }}
+          SSH_PRIVATE_KEY: ${{ secrets.SSH_KEY }}
+          SOURCE: ${{ needs.sign.outputs.signedReleaseFileRelative }}
+          TARGET: ${{ secrets.SSH_PATH_NIGHTLY }}
+      - name: Save version metadata
+        env:
+          DB_HOST: ${{ secrets.DB_HOST }}
+          DB_USER: ${{ secrets.DB_USER }}
+          DB_PASS: ${{ secrets.DB_PASS }}
+          DB_NAME: ${{ secrets.DB_NAME }}
+          APK_SERVER_RELEASE: ${{ secrets.APK_SERVER_RELEASE }}
+          APK_SERVER_NIGHTLY: ${{ secrets.APK_SERVER_NIGHTLY }}
+        run: python $GITHUB_WORKSPACE/.github/utils/save_version.py $GITHUB_WORKSPACE
+
+      - name: Distribute to App Distribution
+        uses: wzieba/Firebase-Distribution-Github-Action@v1
+        with:
+          appId: ${{ secrets.FIREBASE_APP_ID }}
+          token: ${{ secrets.FIREBASE_TOKEN }}
+          groups: ${{ secrets.FIREBASE_GROUPS_NIGHTLY }}
+          file: ${{ needs.sign.outputs.signedReleaseFile }}
+          releaseNotesFile: ${{ steps.changelog.outputs.commitLogPlainFile }}
+
+      - name: Post Discord webhook
+        env:
+          APK_FILE: ${{ needs.sign.outputs.signedReleaseFile }}
+          APK_SERVER_RELEASE: ${{ secrets.APK_SERVER_RELEASE }}
+          APK_SERVER_NIGHTLY: ${{ secrets.APK_SERVER_NIGHTLY }}
+          WEBHOOK_RELEASE: ${{ secrets.WEBHOOK_RELEASE }}
+          WEBHOOK_TESTING: ${{ secrets.WEBHOOK_TESTING }}
+        run: python $GITHUB_WORKSPACE/.github/utils/webhook_discord.py $GITHUB_WORKSPACE
+
+      - name: Upload workflow artifact
+        uses: actions/upload-artifact@v2
+        if: true
+        with:
+          name: ${{ steps.changelog.outputs.appVersionName }}
+          path: |
+            app/release/whatsnew*/
+            app/release/*.apk
+            app/release/*.aab
+            app/release/*.json
+            app/release/*.txt