Chronal vs Tempo by Frozen Ape

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

Tempo by Frozen Ape is a metronome app for Android and iOS, with free Lite editions and paid versions. The iOS app supports tempos from 10 to 800 BPM and lists 35 time signatures, six rhythm patterns for simple meters, and three for compound meters. Users can save presets in setlists and share them by email as Tempo files or text; Android setlist files also work with iOS. On iOS, practice tracking can count bars or elapsed time and stop playback when a chosen limit is reached. The listed audio and display options include 14 sound sets, voice counting, vibration, stereo panning, pulsating LEDs, and full-screen display. The app also lists support for external input devices such as AirTurn, iRig BlueBoard, PageFlip Cicada, and headphone remotes. Tempo Lite is free on both platforms, with in-app purchases; the Android Lite edition contains ads. The paid Android app costs $1.49, paid once, and the iOS version costs $2.99, paid once. Both paid editions include in-app purchases.