Rock-solid timing.

BeatBook is a precision metronome for drummers who take practice seriously. Tempo ramps, polyrhythms, setlists, and Apple Watch haptics.

Available on the App Store iPhone, iPad and Apple Watch

Download on the App Store

BPM 30 to 300 · Polyrhythms · Apple Watch haptics

A metronome that does exactly what you tell it to

A metronome should do one thing perfectly: keep time. BeatBook starts there, with sample-accurate scheduling and under 5 ms of jitter on modern iPhones. Then it adds the tools drummers actually reach for in the practice room.

Tempo ramp drills to push your speed. Polyrhythm patterns for independence work. Unlimited setlists so every song carries its own tempo, time signature, and notes. And an Apple Watch click on your wrist, so you can practice silent at two in the morning without waking the house.

It is built for drummers, but guitarists, bassists, pianists, and anyone working to a click track will feel at home. It does what you ask, and nothing you did not.

Built for the practice room.

Every feature solves a real practice problem, not a checkbox on a spec sheet.

The Metronome

BPM 30 to 300. Accent on beat one or custom accents per beat. Subdivisions from quarters to sixteenths, triplets, and dotted notes. Tap tempo with one finger. Time signatures from 1/4 through 12/8 plus custom.

Tempo Ramp Drills

Start slow, end fast: set a start BPM, an end BPM, and a ramp duration. Step mode holds each tempo for a fixed number of bars before stepping up. Made for double-bass speed work and chops.

Polyrhythms

Two independent layers, each with its own subdivision and sound. 3:4, 5:7, 2:3, and fully custom ratios. Hear both at once, with visual indicators that fire in sync with the click.

Setlists

Save unlimited songs with tempo, time signature, subdivision, and notes. Order them into setlists for rehearsals and gigs. Synced across iPhone, iPad, and Apple Watch via iCloud.

Apple Watch

A haptic click on your wrist, no audio needed. An independent metronome that keeps running even when your iPhone is asleep. Start, stop, and adjust right from the Watch face.

Built for Accuracy

Sample-accurate scheduling with AVAudioEngine, plus latency compensation for Bluetooth headphones and external speakers. Under 5 ms jitter on modern iPhones, even under load.

Why the click lands where you expect

BeatBook schedules every click with AVAudioEngine for sample-accurate timing, then compensates for the latency of Bluetooth headphones and external speakers so the beat lands where your ear expects it. It holds under 5 ms of jitter on modern iPhones, and stays consistent even when the device is under load.

Setlists live locally and sync to your own iCloud account across iPhone, iPad, and Apple Watch. The Watch runs an independent metronome with haptic clicks, so it keeps time on your wrist even when your phone is asleep, no audio and no phone required.

Your practice stays yours

Local first, your own iCloud

Setlists and settings live on your device and sync only to your personal iCloud account. Nothing routes through our servers.

No personal data collected

We do not ask for an account, an email, or any personal information to use BeatBook.

Anonymous signals, off in one tap

Anonymous usage signals help us improve the app. They carry no personal data and can be turned off in Settings at any time.

Rock-solid timing.