POCKT
Free Metronome & Tuner for iPhone
A metronome and chromatic tuner built to feel like an instrument. No ads, no pop-ups, no subscription, no account. Everything stays on your phone.
Download free on the App Store
At a glance
- Name
- POCKT – Metronome & Tuner
- Platform
- iPhone · iOS 15.1 or later. Also runs on iPad, Apple Silicon Mac and Vision Pro.
- Price
- $0. No in-app purchases.
- Data
- None collected. App Store privacy label: “Data Not Collected.”
- Developer
- Gregg Frazer, San Diego
- Status
- Live on the App Store. Version 13.1, November 2026. Age rating 4+.
- App Store
- apps.apple.com/app/id6803804512
- Press contact
- [email protected]
- @pockt.metronome
- TikTok
- @pockt.metronome
Screens
Why it's free
Every metronome app worth using charges a monthly fee for a click. POCKT doesn't, and there's no mechanism for it to start: no servers to pay for, no investors to pay back, no accounts to monetize. One developer who plays, funding it himself. There is nothing to sell you.
Most free apps turn into something else. This one gets better instead. The people using it — teachers, working players — say what's off, and it gets fixed. That's the whole model.
Tell us what's wrong with it
That's not a line. If something's off — the feel of the dial, a sound, the tuner on your instrument — say so, and say it plainly. A blunt email is more useful than a polite one. [email protected], or @pockt.metronome on Instagram, where the people using it talk about what they want next.
What it does
- Weighted dial with haptic detents. One BPM per click, 20–400, no skipped values.
- Haptic beat: the pulse is felt through the phone as well as heard.
- Six beat faces on one native audio clock: Dial, Rhythm, Pulse, Pendulum, Pro, Beatline. Choose downbeat and beat colours, or rainbow.
- Accents, subdivisions and compound meters; tap-to-cycle accent / normal / soft / off per beat.
- Speed trainer that steps the tempo every N bars, and silent bars for internalizing pulse.
- Chromatic strobe tuner alongside the click, A = 432–442 Hz; the click mutes while you tune.
- Six-layer looper. 80+ click, voice and count sounds, all owned outright.
- The microphone is used only for the tuner and the looper. Nothing leaves the phone.
Timing, measured
The click is driven by a native audio clock, and the timing was measured rather than estimated. Across 364 beat intervals at tempos from 80 to 151 BPM:
For reference, a single frame of 60 fps video is 16.7 ms. The raw onset data and measurement notes are available to any writer who wants to check the figures; email the address below.
Common questions
Is POCKT really free?
Yes. No cost, no in-app purchases, no subscription, no ads, no account. There are no servers to pay for and no investors to pay back, so there is no mechanism for it to start charging.
What tempo range does it cover?
20 to 400 BPM in single-BPM steps. The weighted dial gives one haptic detent per BPM and never skips a value.
Does it include a tuner?
Yes — a chromatic strobe tuner that runs alongside the click, with reference pitch from A = 432 to 442 Hz. The click mutes automatically while you tune. It works for guitar, bass, violin, brass, woodwind and voice.
How accurate is the timing?
Median inter-onset error of 0.02 ms across 364 measured intervals, with drift under 0.11 ms over 72 beats. The figures above are measured, not claimed.
Does it collect any data?
No. The App Store privacy label reads “Data Not Collected.” The microphone is used only for the tuner and the looper, and nothing leaves the phone.
Does it work on iPad or Mac?
It's built for iPhone, and also runs on iPad, Apple Silicon Macs and Apple Vision Pro. It needs iOS 15.1 or later.
Assets
App icon at 1024 px, the nine screens above at 804 × 1668, and the two loops at 540 × 1120. Right-click or long-press any image to save it. Higher-resolution captures and longer video on request.
Contact
Gregg Frazer · [email protected]
Replies within the day. Builds, measurement data, or a straight answer to anything. If you think it falls short, that email is the one I most want to read.