Polyrhythms you can see.

Metropoly is a polyrhythmic metronome app that turns polyrhythms into something you can see and feel. It helps you develop an intuition for complex rhythms by visualizing them in a way that makes their structure obvious at a glance.

iPhone · iPad · Mac
one purchase to rule them all
iPhone · iPad · Mac

Features

Six rhythms
Each with its own beat count, all lining back up every cycle.
Color and pitch per rhythm
Each rhythm keeps its own shade and note, so the parts stay separable by eye and ear.
Video export
1080p or 4K, looped 1 to 64 times, frame and sample accurate, with or without audio. Renders in the background.
Count-in
One full cycle of the first rhythm before the loop starts.
Presets
Save named presets; the app reopens where you left off.
Six themes
Three light, three dark. Can follow your system appearance.
Works offline
No account, no network, nothing sent anywhere.
Built with your feedback
One developer, no support tickets. Send a suggestion and it might ship in the next update.
Metropoly app icon

Buy it once.
Own it forever.

one purchase for iPhone, iPad and Mac · no subscription · no ads