Blitz: Fischer Chess Clock

A minimalist Fischer chess clock for Android.

This app is free software. Its source code is available under the Apache License 2.0.

Features

• Defaults to 5+3 Fischer timing (5 minutes + 3 seconds per move).
• Total time and increment can be set by horizontal and vertical dragging.
• The back action pauses or resets the clock.

Install

The app can be installed from four different sources:

1. F-Droid: built and signed by the developer and verified by F-Droid to correspond to the available source code.
2. Accrescent: built and signed by the developer.
3. Play Store: built and signed by Google who can modify the app to optimize its performance, security and/or size.
4. GitHub: built and signed by the developer.

All sources are using the same private signing key, so the app can be updated using a different source to the one it was installed from. For example, an app installed from F-Droid can be updated to a newer version downloaded from the Play Store.

Public key certificate fingerprint

6d7fd2715ed21cff64086dc5fcf8820a685a793ebd07d972163d86172babba75

About

This is a native Android app that requires no permission and is compatible with Android 5.0+. It is entirely built with Jetpack Compose and implements:

• Predictive back gestures (Android 14+)
• Per-app language preferences (Android 13+)
• Support for right-to-left languages
• Precise orientation handling
• Keyboard navigation

Links

License: Apache-2.0 — Website — Issue Tracker — Source Code — Changelog — Privacy Policy

Screenshots

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