A tuner.
A pretty good one.
A fast, accurate chromatic tuner for iPhone, iPad, Android, and your DAW. Free on every platform. No ads, no accounts, no tracking. Try it right here, in your browser.
It does the job.
Chromatic, for any instrument
Play a note and Sointi names it: guitar, bass, ukulele, violin, voice, brass. Any tuning, no modes to pick.
Built for precision
The same Rust pitch engine runs on mobile and desktop, giving you fast detection, stable readings, and consistent results everywhere.
Starts instantly
Open the app and tune. No splash screen, sign-in, setup, or waiting.
How it stays accurate: a small neural network (about 96 k parameters, small enough for any phone) reads a spectrogram of the signal and estimates the pitch. A probabilistic YIN tracker runs alongside it and vetoes the octave mistakes neural models sometimes make; together they catch each other's errors.
One tuner. Pocket to studio.
The same engine and the same numbers, whether it's in your hand or on a track in your DAW. Free everywhere.
In your pocket.
The complete chromatic tuner on iPhone, iPad, and Android. Any instrument, any tuning. Free, with no accounts and no ads.
In your studio.
AU and VST3 for macOS (Apple Silicon and Intel), VST3 for Windows. Add Sointi to a track and tune without leaving your session. Same engine, same numbers as the phone app.
Short answers.
- When can I get it?
- Very soon — Sointi is in final polish. There is no exact date to promise, but this page gets real download links the day it is out.
- Is Sointi really free?
- Yes. The whole app, on every platform. No trial, no subscription, no hidden upgrade.
- Does it work offline?
- Completely. Pitch detection runs on your device, so the app never needs a network.
- Which plugin formats are supported?
- AU and VST3 on macOS (Apple Silicon and Intel), VST3 on Windows. No AAX yet.
- Does it have guitar or bass modes?
- No. Sointi is a chromatic tuner: it shows the nearest note to whatever you play, so it works for any instrument and any tuning without picking a mode.
- Does it collect any data?
- No. No analytics, no ads, no accounts.
Free. Forever.
The complete tuner, on every platform. No ads, subscriptions, accounts, tracking, or locked features.