Chronal vs MetroGnome

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.

MetroGnome is an iPhone and iPad app combining a metronome, rhythm-pattern editor, and instrument tuner. Its metronome runs from 20 to 300 BPM and offers tap tempo, customizable meters, subdivisions, nine synthesized tick sounds, and live beat accents ranging from strong to silent. Eleven flamenco palos include traditional accent cycles that can be edited during playback. The pattern editor supports unlimited measures, mixed time signatures, rests, tuplets, repeats, tempo changes, and real staff notation. The tuner covers 60 instrument tunings across five families, plus chromatic Any Note mode and 16 historical reference pitches such as Baroque A=415 and Verdi's A=432. These tools run on-device and offline without an account or login, while clicks continue with the screen locked or another app open. The maker says tuner audio is analyzed in memory and not recorded, stored, or transmitted. iOS 17 or later is required; Android is coming soon.