Guitar and Violin Tuner

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15.3K reviews
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About this app

Guitar and Violin Tuner is an extremely accurate instrument tuner for many instruments, like guitar, violin, bass, ukulele, viola, cello, banjo and shamisen, including many alternate tunings and variants.

Professionals appreciate its precision, beginners quickly learn to tune their instrument properly. The application is easy to use thanks to a combination of a chromatic and a strobe tuner on one screen, and provides the most accurate tuning you can achieve.

The chromatic tuner precisely detects the frequency of the tone played on your instrument, and shows it on the chromatic scale. The target pitches are highlighted on the scale, and you can see how much is the tone out of tune. When you get close enough, you can use the strobe tuner for fine tuning.

The strobe tuner helps you to achieve extreme accuracy. The pattern is moving to the right when the tone is too high, indicating that you need to tune down. When it is moving to the left, just tune up. The slower the pattern moves, the better is your instrument tuned.

If you are in doubt how to use the tuner, please read the built-in help, and see the examples of the tuning process there.

The strobe tuner uses an independent algorithm from the chromatic tuner. While the chromatic tuner uses the Fast Fourier Transformation, the algorithm in the strobe tuner is much closer to what you can find in oscilloscopes, and is computed directly on the GPU of your phone or tablet.

You can also use the tuner to tune by ear. The buttons at the bottom of the screen play the reference tones and you can tune accordingly. The tones are synthesized, and respects the setting of the concert pitch.

The tuner has been tested with many guitars, violins, basses, ukuleles, banjos and shamisens.


• Guitar tuner for beginners & pros
• Other instruments: Bass, ukulele, viola, cello, banjo, shamisen
• Advanced noise cancellation - works even with a metronome on
• The most favorite alternate guitar, ukulele, banjo and shamisen tunings
• Precision tuner suitable for professionals
• Plays reference tones
• First-start tutorial to understand the usage
• Built-in help to understand the app better
• Two independent tuning algorithms: chromatic tuner using the Fourier transformation and strobe tuner emulating the stroboscopic effect
• Quick, precise, and accurate tuner
• Concert pitch frequency setting
• Note naming: English, European, Solmization
• Equal temperament
• Quick access to settings to switch between instruments
• Send feedback: Record the string, e-mail it directly from the application, and we will add it to our built-in tests
• Tested with many instruments, recorded for use in a test suite that is regularly run before releases

This tuner is ideal for all violins, guitars, basses, ukuleles, violas, cellos and banjos. You will absolutely love the sound of your instrument, and the music you play!
Updated on
Apr 6, 2022

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15.3K reviews
Sam Stone
January 9, 2021
Easily the most accurate I've been able to find (unfortunately an absolute necessity for my low skill level). My favorite guitar sometimes has a tendency to lose tone on certain strings and specific points on the neck, and this helps me find the middle ground so I can try and keep it consistent. Very, very good for beginners or anyone with suspected similar issues. Pros may or may not need help, but this would be an excellent tool to validate tones/tuning even at that level.
24 people found this review helpful
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Brett Rhoades
October 22, 2020
I have to say this app is a great tuner for a violin. I fell into the trap of blaming the app when something didn't work "like it use too" after an update. I know that 99% of the time if you delete, and reinstall it fixes problems as it did for me. We get so trusting of our cell phones that this simple response fixes issues.
40 people found this review helpful
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A4tune Labs
October 22, 2020
Hi Brett, really glad to hear that the re-installation has fixed the issue for you. All the best! :-)
Harlan U
January 7, 2019
Simple interface but not very useful. A tuner should show the frequency heard, especially if you're tuning to a nonstandard A pitch. The strobe is annoying and hurts my eyes. Also when I strike my tuning fork against my phone and hold it to my microphone the strobe is perfectly aligned, but it still moves for some reason which is disorienting. A color or numerical or simple bar display is more natural for fine tuning than the strobe effect.
12 people found this review helpful
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A4tune Labs
January 7, 2019
Hi Harlan, thank you for your feedback! You can switch to showing the exact frequency (instead of the difference in cents) in the settings. Regarding the movements of the strobe, I'd be interested in a recording of such a session (via Send Feedback from the Navigation menu), can you send it to, please? Thank you in advance!

What's new

• Metronome.
• Reworked help and other improvements.
• Finnish translations thanks to Käännöksen Tekijä.