Chronal vs Pro Metronome

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.

Pro Metronome is an Android and iOS app for music practice and stage performance. It offers 13 metronome tones, adjustable time signatures and accents, and tempo entry by tapping. The maker says its Real-Time Playback technology provides accuracy of ±20μs. A basic tuner is included; Pro adds a tuner with customizable A4 calibration and temperaments. Pro features also include subdivisions, polyrhythms, programmable playlists, a rhythm trainer, and automatic tempo changes in Practice Mode. On iOS, playback can sync between devices via Ableton Link, and Bluetooth or MIDI control pedals are supported. The App Store listing covers iPhone, iPad, Apple TV, and Apple Watch, with iPhone compatibility requiring iOS 16.0 or later. The free version includes basic metronome features and is ad-free. Listed paid options are $0.99 a month, $3.99, paid once for Pro Version, and $3.99 a year. On Android, flash mode requires a flash-enabled device and camera permission, while vibration requires a phone.