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Installation guide

ReUCM is available for Windows, Android, and iOS. Choose your platform below for installation instructions.

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Windows installation

1

Check system requirements

Ensure your system meets the minimum requirements:
  • Windows 10 (version 1803) or higher
  • Microsoft Edge and WebView2 installed (not removed)
Most modern Windows 10 and Windows 11 installations include WebView2 by default.
2

Download the installer

Download the latest Windows installer from the GitHub Releases page:
  • ReUCM_windows.exe - Standard installer (recommended)
  • ReUCM_windows_portable.7z - Portable version (no installation required)
3

Run the installer

For the standard installer:
  1. Double-click ReUCM_windows.exe
  2. Follow the installation wizard
  3. Choose installation directory (default: C:\Program Files\ReUCM)
  4. Click “Install”
For the portable version:
  1. Extract ReUCM_windows_portable.7z using 7-Zip or WinRAR
  2. Run re_ucm.exe from the extracted folder
4

Launch ReUCM

  • Standard installation: Launch from Start Menu or desktop shortcut
  • Portable version: Run re_ucm.exe directly from the extracted folder
If Windows SmartScreen blocks the installer, click “More info” and then “Run anyway”. This happens because the application is not signed with a commercial code signing certificate.

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Android installation

1

Enable installation from unknown sources

Before installing, you need to allow installation from unknown sources:
  1. Open Settings on your Android device
  2. Navigate to Security or Privacy
  3. Enable Install unknown apps for your browser or file manager
On Android 8.0+, you grant this permission per-app rather than globally.
2

Download the APK

Download the latest Android APK from the GitHub Releases page:
  • ReUCM_android.apk - Universal APK (works on all devices)
  • ReUCM_android_arm64-v8a.apk - Optimized for 64-bit ARM devices (recommended for modern phones)
  • ReUCM_android_armeabi-v7a.apk - For older 32-bit ARM devices
  • ReUCM_android_x86_64.apk - For x86_64 devices (emulators, tablets)
Choose the ARM64 version for best performance on modern devices. Use the universal APK if you’re unsure.
3

Install the APK

  1. Open your device’s file manager or Downloads folder
  2. Tap the downloaded APK file
  3. Tap “Install” when prompted
  4. Wait for installation to complete
4

Grant permissions

When you first launch ReUCM, grant the following permissions:
  • Storage - Required to save downloaded books
  • Internet - Required to access book resources
Share menu integration works automatically once installed - no additional configuration needed.

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iOS installation

iOS installation requires TestFlight or manual building from source, as ReUCM is not currently available on the App Store.
1

Join TestFlight (if available)

If a TestFlight beta is available:
  1. Install TestFlight from the App Store
  2. Open the TestFlight invitation link (check the GitHub repository or BooksFine Telegram channel)
  3. Tap “Accept” to join the beta
  4. Tap “Install” to download ReUCM
2

Build from source (alternative)

If TestFlight is not available, you can build the app yourself:
  1. Clone the repository: git clone https://github.com/BooksFine/re_ucm.git
  2. Install Flutter 3.29.3 or higher
  3. Navigate to re_ucm_app directory
  4. Run flutter pub get
  5. Run dart run build_runner build --delete-conflicting-outputs
  6. Connect your iOS device
  7. Run flutter run --release
You’ll need a Mac with Xcode and an Apple Developer account for iOS development.

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Verify installation

After installation, verify ReUCM is working correctly:
  1. Launch the application
  2. You should see the main screen with available portals (e.g., Author.Today)
  3. Check for updates in the settings menu
ReUCM includes automatic OTA (over-the-air) updates. When a new version is available, you’ll see a notification with the option to update.

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Troubleshooting

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Windows: Application won’t start

  • Ensure WebView2 is installed. Download it from Microsoft’s website
  • Try running as administrator
  • Check Windows Event Viewer for error details

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Android: Installation blocked

  • Verify you’ve enabled “Install unknown apps” for your browser/file manager
  • Try downloading again - the file may be corrupted
  • Disable Play Protect temporarily during installation

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Storage permissions denied

  • Go to Settings → Apps → ReUCM → Permissions
  • Enable Storage/Files permission manually
  • Restart the app

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Next steps

Now that ReUCM is installed, proceed to the quick start guide to download your first book.

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