Klck
A sample-accurate metronome for iPhone, iPad, and Mac.
Klck
A sample-accurate metronome for serious practice.
Built for musicians who care about timing. Every click is scheduled in absolute sample frames inside the audio engine’s render callback, so timing stays rock-solid — immune to UI jitter, app-switch lag, or system load.
Available now on the App Store — $1.99 for iPhone and iPad.
macOS version coming soon.
iPhone (compact layout) and iPad (wide DB-66 layout) — the same code, two layouts.
What’s in the box
Core
- Tempo 30–300 BPM with slider, ± steppers, and tap tempo
- Up to 16 beats per measure with per-beat accents (Accent → Normal → Muted)
- Four independent subdivision layers — 8ths, triplets, 16ths, quarters — each with its own volume, mute, and timbre
- Per-role sounds: pick a distinct waveform (Sine, Wood, Beep, Click) for the accent, the normal beat, and every subdivision layer
- Master volume
Practice tools
- Swing 0–60% — delays the off-beat 8th/16th toward a triplet feel
- Quiet Count — play N bars, then auto-mute M bars so you have to hold time yourself
- Tempo Trainer — ramp BPM from a start to a target by +N every M measures
- Practice Timer — run for a set duration with a live countdown, then auto-stop
- Beat flash — the screen pulses on the beat, brighter on the downbeat
Setlists
- Chain presets into an ordered list and step PREV / NEXT through them
- Optional per-stop auto-advance after a set number of bars
- Save and recall named presets that capture the full configuration
Tuner + tone
- Chromatic tuner with note name, frequency, and a ±50‑cent meter (autocorrelation + parabolic interpolation, on-device)
- Reference tone generator with semitone stepping, A=440 preset, and independent volume — runs with or without the metronome
Privacy you can verify
Klck collects nothing. No accounts, no analytics, no crash reporting, no advertising SDKs, no network requests. The microphone is used only for the on-device tuner and is discarded as soon as it’s analyzed for pitch.
You don’t have to take my word for it — read the privacy policy, or read the source code.
Open source
Klck is community-supported software released under the MIT License. The full source is on GitHub. Issues, pull requests, and feature ideas are welcome.
Get Klck
- iPhone & iPad — $1.99 on the App Store. Available now.
- macOS — coming soon to the Mac App Store. Same code, native Mac build.
- Build from source — the macOS app builds without Xcode (
make runwith Command Line Tools). See the README.