JustTune: Guitar Tuner

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In-app purchases

About this app

JustTune is a fast, accurate guitar tuner with no ads, no subscription, and no account. Open the app, play a string, and you're in tune in seconds — nothing between you and the needle.

Tired of "free" tuner apps wrapped in ads, upsell screens and subscription prompts? JustTune is the no-nonsense alternative: a precise chromatic tuner that respects your time.

FREE, FULLY FUNCTIONAL
• Accurate chromatic tuner — play any note, see the nearest pitch instantly
• Standard guitar tuning (E A D G B E) with automatic string detection
• Smooth needle display with a cents readout
• Auto and manual string modes, with a satisfying ding when each string locks in
• Works completely offline — no account, no sign-up, no trackers
• No ads. Ever.

PRO — PAY ONCE, TUNE FOREVER
One single purchase unlocks everything. No subscription, no recurring charges, ever:
• Alternate guitar tunings: Drop D, DADGAD, Open G, Open D
• Bass tuner (E A D G) — detects all the way down to low E
• Ukulele tuner (g C E A)
• Strobe tuner display for fine, pro-level accuracy
• Calibration: set your A4 reference anywhere from 432 to 446 Hz
• Themes, including a dark, glare-free stage mode for gigging musicians

WHAT JUSTTUNE DOESN'T HAVE — ON PURPOSE
No lessons. No chord games. No song library. No social features. No notifications. No account. Every feature we left out makes the one feature that matters faster: tuning your instrument.

MADE FOR
• Acoustic and electric guitar players who just want to tune and play
• Bass and ukulele players
• Gigging musicians who need instant, reliable tuning between songs
• Parents and teachers who want a safe, distraction-free tuner for students
• Anyone burned out on subscription apps

HOW IT WORKS
JustTune listens through your microphone and detects pitch in real time with professional-grade accuracy. Auto mode recognizes which string you're playing; manual mode locks onto one string for noisy rooms. The needle (or strobe) shows exactly how many cents sharp or flat you are, and a gentle ding confirms when each string is in tune.

Your microphone is used only for pitch detection, only while the app is open. Nothing is recorded, stored, or sent anywhere.

Pay once. Tune forever. That's the whole business model.