Mode
The app recognizes the string you play.
Guitar, bass and violin tuner
Tuner
TunerPlay a string.Turn the peg.
Open the app, play a string, and see right away which way to turn the tuning peg. Tuner opens straight on the tuner, with your last instrument and tuning. No account, even in airplane mode.
- No account
- Airplane mode
- Mic never records
Try it: tune every string
E₂
83.78 Hz+29 cents
Too highTuning peg
Drag the knob up or down, or use the keyboard arrows, until it says “In tune”.
Turn sound on to hear your string get closer to the note.
A dial you read at a glance
Note, octave, measured frequency and deviation in cents, with “Too low”, “Too high” or “In tune”. Nothing to interpret: you see which way to turn.
- 1
Note and octave
The string it recognized, as C D E or Do Ré Mi.
- 2
The needle
It leans towards “Too low” or “Too high”: turn the peg to bring it back to the center.
- 3
Frequency and cents
The measured frequency in Hz and the deviation in cents, for the curious.
- 4
The verdict
“Too low”, “Too high” or “In tune”, in plain words.
- 5
The strings
Auto mode: the app recognizes the string you play. Manual mode: tap a string key to lock it.
- 6
Hear the note
The target note, played through the phone speaker.
For best results, play one string at a time in a quiet room, with the phone 15–30 cm from the instrument.
Your tuner pedalboard
The app's settings, under your foot. Flip, turn, try: the dial above follows.
E₂6-string guitar · Standard · A 440 HzAuto
Reference
ProThe pitch of A, adjustable from 415 to 466 Hz.
Notes
Note names as C D E or Do Ré Mi, your choice.
Strings
ProCustom tunings with 2 to 12 strings, string by string.
Profiles
ProSwitch instrument, tuning and pitch in one tap.
Offline
Works in airplane mode, from the very first launch.
Example profiles. Light, dark or automatic theme on top.
From low to high
6-, 7- and 8-string guitars, 4- and 5-string basses, violin, viola and cello: every open string is placed on the frequency scale. Chromatic mode covers other instruments within the supported range.
5-string bass
B₀E₁A₁D₂G₂
Open strings: B₀ E₁ A₁ D₂ G₂4-string bass
E₁A₁D₂G₂
Open strings: E₁ A₁ D₂ G₂Cello
C₂G₂D₃A₃
Open strings: C₂ G₂ D₃ A₃8-string guitar
F♯₁B₁E₂A₂D₃G₃B₃E₄
Open strings: F♯₁ B₁ E₂ A₂ D₃ G₃ B₃ E₄7-string guitar
B₁E₂A₂D₃G₃B₃E₄
Open strings: B₁ E₂ A₂ D₃ G₃ B₃ E₄6-string guitar
E₂A₂D₃G₃B₃E₄
Open strings: E₂ A₂ D₃ G₃ B₃ E₄Viola
C₃G₃D₄A₄
Open strings: C₃ G₃ D₄ A₄Violin
G₃D₄A₄E₅
Open strings: G₃ D₄ A₄ E₅Frequency (Hz, logarithmic scale)
The mic only listens to pitch
The microphone is only used to measure the pitch of the note. No sound is recorded or sent anywhere: the audio stays in memory for the time of the calculation, then only a number is left.
What the mic picks up
What the app keeps83.78 Hz
Nothing is recorded
No sound is recorded or sent, and no audio file is created.
Mic off as soon as you leave the tuner
It stops when the tuner is no longer visible or the app goes to the background.
No account, even offline
Your instruments and tunings stay on your phone.
Third-party services, never your sound
Google Play and RevenueCat for Pro, Google AdMob for the free version's banner (after your consent). No sound is passed to them.
- Read the privacy policy
Free, and Pro as a one-time purchase
Free
- 6-, 7- and 8-string guitars, 4- and 5-string basses, violin, viola, cello
- Chromatic mode, Auto and Manual modes
- Reference note through the speaker
- C D E or Do Ré Mi, light, dark or automatic theme
- One banner ad
Tuner Pro
A one-time purchase, no subscription.
- No ad banner
- Instrument profiles
- Custom tunings with 2 to 12 strings
- Reference pitch from 415 to 466 Hz
An optional support also exists, in three amounts: it unlocks nothing and is never asked again.
Tuner, the guitar, bass and violin tuner that works offline
Tuner (Guitar & Bass Tuner) is an Android app that tunes a guitar, bass, violin, viola or cello: you play a string and see right away which way to turn the tuning peg. It opens straight on the tuner, with your last instrument and tuning.
The dial shows the note, octave, measured frequency and deviation in cents, with “Too low”, “Too high” or “In tune”. Auto mode recognizes the string you play, Manual mode lets you lock one, and a reference note plays through the phone speaker. 6-, 7- and 8-string guitars, 4- and 5-string basses, violin, viola and cello are supported, along with a chromatic mode.
The microphone is only used to measure pitch: no sound is recorded or sent, and there is no account. The app works in airplane mode from the first launch. The free version shows a banner; Pro, a one-time purchase, removes it and adds instrument profiles, custom tunings with 2 to 12 strings and a reference pitch from 415 to 466 Hz.
Tuner: frequently asked questions
How do I tune a guitar with my phone?
Open the app, play a string and look at the dial: it says “Too low”, “Too high” or “In tune” so you know which way to turn the tuning peg. Play one string at a time in a quiet room, with the phone 15–30 cm from the instrument.
Which instruments are supported?
6-string guitar, 4-string bass, 5-string bass including the low B, 7- and 8-string guitars, violin, viola and cello, plus a chromatic mode for other instruments within the supported frequency range.
Does Tuner work offline?
Yes, in airplane mode, from the very first launch.
Does the microphone record my playing?
No. The microphone is only used to measure the pitch of the note: no sound is recorded or sent. It stops as soon as the tuner is no longer visible or the app goes to the background.
What is the difference between Auto and Manual mode?
In Auto mode, the app recognizes the string you play. In Manual mode, you tap a string key to lock it and tune it without ambiguity.
Can I change the reference pitch of A?
Yes, with Pro: the reference pitch is adjustable from 415 to 466 Hz.
Can I create my own tuning?
Yes, with Pro: custom tunings with 2 to 12 strings, string by string. The Standard, Drop D and half step down presets are free depending on the instrument.
Can note names show as C D E?
Yes, note names show as C D E or Do Ré Mi, your choice.
Is the app free?
Yes, with a banner ad. A one-time Pro purchase removes it and adds instrument profiles, custom tunings and an adjustable reference pitch.
Where can I download Tuner?
On Google Play: tap the Google Play button on this page. The app is available in English and French.
