Chronal

Chronal is an Android metronome and tuner for musicians, with tools for timing, rhythm practice, and instrument tuning. The metronome visualizes beats and subdivisions, supports tap tempo and custom time signatures, and includes a notation editor for creating rhythms. Two synchronized metronomes can play polyrhythms, while conductor mode combines metronome and tuner functions. The app includes seven sound packs and can play audio files at custom tempos. Its tuner supports transposition for any instrument and custom tuning frequencies, detects BPM from microphone input in real time, and provides an A4 reference tone with an adjustable frequency. A fullscreen mode uses large visuals intended to be visible from a distance. Chronal is free, ad-free, open source, and funded by donations. It is available through F-Droid and Google Play, with source code published on GitHub. The F-Droid version requires Android 6.0 or newer. Google Play reports that the developer declares no data collection or sharing; F-Droid lists microphone permission for use while the app is in use.

Chronal brings rhythm creation, tempo playback, and tuning into one free Android app. Its microphone-based BPM detection and fullscreen display extend its timing tools beyond a basic metronome.

Chronal suits beginner and advanced musicians who want metronome and tuning tools on Android. It also fits users looking for an ad-free app with open-source code.

Chronal is an Android practice app that combines rhythm tools, tempo playback, and tuning for musicians who want more than a basic click. It suits beginners and advanced players alike, particularly those who work with custom rhythms or tunings. Its broad toolkit costs nothing and is ad-free, but it is limited to Android.

Overview

Chronal brings a metronome and tuner together with tools for shaping practice. Tap tempo, custom time signatures, and subdivision controls cover everyday timing work, while an editor for custom rhythms and two synchronized metronomes serve more involved patterns. That range makes it a stronger fit for musicians who want to build a specific exercise than for someone seeking only a simple pulse.

Audio files can be played at custom tempos, and the tuner can detect percussion BPM through the microphone in real time. A fullscreen display is designed to remain visible from a distance, a practical advantage when a phone is placed away from the player. The app is open-source, ad-free, and funded by donations.

Key features

Rhythm and tempo

Beat and subdivision visualization make rhythmic placement visible, while the notation editor lets players create custom rhythms. Two synchronized metronomes support polyrhythmic practice, and Conductor mode combines metronome and tuner functions. Seven sound packs provide different click sounds. These tools cover a wider range of practice needs than a conventional metronome, though Chronal remains a single-platform app rather than a shared solution for musicians using different operating systems.

Users can play audio files at custom tempos, which is useful for slowing or speeding material during practice. Microphone-based BPM detection identifies percussion patterns in real time; it requires microphone access while the app is in use. This complements manual tap tempo, although the app's timing tools are focused on individual practice rather than documented collaboration features.

Tuning

The tuner supports transposition for any instrument and custom tuning to any frequency, alongside an A4 reference tone with adjustable frequency. That flexibility makes it useful beyond standard tuning, especially for players working with alternate tunings. The combination of tuning and rhythm tools can reduce the need to switch between separate practice apps.

Pricing

Chronal is free: its plan costs nothing and includes an ad-free app funded solely by donations. There is no free trial because the app is free. The app's free access has no stated paid tier or subscription to weigh against it; the trade-off is that it is Android-only.

Platforms

Chronal runs on Android and is available through F-Droid and Google Play, with source code published on GitHub. The F-Droid version requires Android 6.0 or newer and provides builds for arm64-v8a, armeabi-v7a, x86, and x86_64. F-Droid's directly installed APK does not provide update notifications; its client is recommended for that purpose.

Google Play reports that the developer declares no data collected and no data shared with third parties. Chronal's microphone permission allows audio recording while the app is in use.

Who it's for

Chronal is a strong fit for Android musicians who want an ad-free practice tool with custom rhythm creation, polyrhythms, flexible tuning, and tempo detection in one app. Its fullscreen view also suits players who need a tempo display visible from a distance. Musicians who need iOS or desktop availability should look elsewhere.

Pros and cons

• Pros: Custom rhythms, synchronized metronomes, subdivision visuals, and custom time signatures support practice beyond a steady beat.
• Pros: The tuner covers instrument transposition and custom frequencies, while BPM detection and audio playback add useful tempo tools.
• Pros: The app is free, ad-free, and open-source.
• Cons: Android-only availability rules it out for players who need the same app on iOS or desktop.
• Cons: Microphone-based tempo detection requires audio-recording access while the app is in use.

Alternatives

For a wider selection, browse Metronome Apps.

Tempo by Frozen Ape is worth considering if iOS availability matters; its Android and iOS Lite versions are free, with ads on Android and in-app purchases on both platforms.

Easy Metronome suits musicians who want a free-to-download option across Android, iOS, macOS, and Windows, with additional sound packs offered as optional in-app purchases.

MagicBPM is another cross-platform option, available on Android, iOS, macOS, and web; its core app is free, with ads on iPhone and Android and an ad-free Mac app.

MetroGnome is an iOS alternative.

Metronome Beats offers Android, iOS, macOS, and web versions; its free app contains ads and in-app purchases.

Metronome Plus is an iOS option with a free, ad-supported version and a paid version that removes ads and enables background play.

Metsa is an iOS alternative with a simple mode available free and an advanced monthly subscription.

PolyMetronome is available on Android, iOS, and web, with a free Simple Mode and a paid Pro tier.

Verdict

Choose Chronal if you use Android and want a free, ad-free app that pairs detailed rhythm practice with adaptable tuning and tempo tools. Its main advantage is the breadth of those tools in one package; its clearest reason to look elsewhere is the lack of iOS or desktop support.