The circle
One ring shows the whole bar. See where every note falls, and drag notes to a new place on the grid.
Rhythm & time-feel trainer
Feel the space between the beats.
Metrum puts your rhythm on a circle. Place notes on the ring, slide the feel, and hear straight time turn into swing, Dilla, samba or flamenco. Then practise it until it sits.
One-time purchase · No subscription · No card for the trial · 14-day money-back guarantee
Watch the 4-minute tourLoading the demo…
Live demo — this is the real app
Tap the ring to place notes, tap the centre to play, then open FEEL and slide it.
That's part of the full version.
Everything a groove needs.
Built by a drummer for daily practice: on the pad, on the kit or on any instrument.
Any meter, any subdivision
1 to 8 beats, each split into 1 to 8: eighths, triplets, sixteenths, quintuplets, sextuplets and more.
Time feels
Swing at any amount, plus Dilla, Samba 16, Afro 12/8 and Flamenco. Each one moves the notes to where that style puts them.
Pattern permutations
Slide a pattern around the ring through every starting point, without rewriting a note.
Stickings
Lay RL, RRLL or a paradiddle on the grid, then slide it through every rotation while the pattern stays put.
Groupings
Mark phrases like 3+3+2 or 2+2+3 right on the ring, so odd groupings become something you can see.
Sheet view
Turn on notation and read what you're playing, with every beat written out.
Sequence mode
Chain patterns, set how many times each repeats, and loop a whole exercise from start to finish.
$10once
No subscription. Pay once, keep it.
- Every meter and subdivision
- Every time feel
- Pattern permutations and stickings
- Sequence mode and sheet view
- Unlimited saved patterns
- All sounds and themes
- Phone, tablet and desktop — right in the browser
14-day money-back guarantee
Not for you? Write to us within 14 days and you get a full refund. No questions asked.
7 days of everything, free
Sign in with email or Google and every feature is open for a week. No card needed, so it can't turn into a charge.
Nothing to install
Metrum runs in your browser. On your phone, add it to the home screen and it opens like an app.
Questions
Does it work on my phone?
Yes. Metrum runs in any modern browser on iPhone, Android, tablets and computers. On a phone, use “Add to Home Screen” in the browser menu to open it like an app.
Is it a subscription?
No. You pay $10 once and Metrum is yours. Nothing renews.
What do I get in the free trial?
Everything, for 7 days. You only need an email address or a Google account, no card. When the week is over the app drops back to demo level, and everything you made stays on your device.
Do I need an account?
Yes, so your purchase works on all your devices. There's no password: you sign in with a link sent to your email, or with Google. If you buy without signing in, the purchase goes to the email you enter at checkout. A new account is signed in right after paying. If that email already has an account, just sign in with it.
Where are my patterns stored?
On your device, in your browser. We don't receive them.
What if I don't like it?
Write to us within 14 days of buying and we'll refund you in full.
Will there be an App Store or Google Play version?
Not yet. Native apps are planned; for now Metrum runs in the browser, and on a phone you can add it to your home screen.