(iOS version here: https://github.com/depasca/iGOTronome)
A precision metronome designed for real musicians, rehearsals, and skill training — available on Android and iOS.
GOTronome is an ultra-responsive visual metronome built for band practice, silent rhythm training, and phrase looping. It uses native audio engines (Oboe on Android, AudioUnit on iOS) for sample-accurate timing and a custom rendering loop for perfectly synchronized visuals.
🚀 Features 🎚️ 1. Designed for Band Practice
In loud rehearsals, traditional click tracks get lost. GOTronome gives you big, bright, color-changing beats that the whole group can see at a glance.
Every beat flashes with a clear visual pulse
First beat is highlighted
Works from across the room — perfect for live band sessions
Also great for drummers who want visual timing cues
🤫 2. Silent Bar Mode — Train Your Internal Clock
Can you keep the tempo when the metronome drops out?
Silent Bar Mode lets you mute a chosen number of bars so you can test and improve your internal timing:
Choose how many bars go completely silent
Dramatically improves timing accuracy and feel
Perfect for:
Rhythm training
Practicing steadiness without depending on clicks
🔁 3. Bar Loop Mode — Practice Phrases & Solos
Need to clean up a tricky lick or a short solo section?
Bar Loop Mode shows both the beat number and the current bar so you always know where you are in a phrase.
Just set:
BPM
Beats per bar
Number of bars in the phrase
And the metronome loops that phrase over and over — no mental counting required.
Great for:
Jazz & fusion licks
Drum fills
Polyrhythm practice
Learning complex musical phrases
🛠️ Technical Highlights
Perfect audiovisual sync using a real-time rendering loop
Native audio engines
Android → Oboe
iOS → AudioUnit with fast C backend
Ultra-low latency
No jitter between sound and visuals
Lightweight codebase with clear separation between UI and audio engine
100% open source
📲 Download
Android: Google Play Store https://play.google.com/store/apps/details?id=com.pdp.gotronome&pcampaignid=web_share
iOS: App Store https://apps.apple.com/us/app/gotronome/id6755876341
(Links coming soon)
🤝 Contributing
Bug reports, feature requests, and pull requests are welcome! Feel free to open a discussion if you want to propose larger architectural changes.
📄 License
MIT License — see LICENSE for details.
GOTronome is implemented in Jetpack Compose and uses Oboe for real-time audio. It is lightweight and simple. Oboe is accessed through JNI. Here's a simple diagram that illustrates the architevture:
To compile the app, first get Oboe (https://github.com/google/oboe), then update CMakeLists.txt to point to your local Oboe directory