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Guitar Tuner, Violin: Tuneo
Great tuner for your guitar, violin, bass or ukulele. Simple, accurate and free.
Tuneo, also known as "Guitar and Violin Tuner" is an extremely accurate instrument tuner for a wide range of instruments, like guitar, violin, bass, ukulele, viola, cello, banjo and shamisen, including many alternate tunings and variants.
The tuner also features a built-in metronome, combined with a chromatic tuner. This makes practicing much easier - you can control the metronome and check the intonation at the same time.
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.
Features:
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
Metronome
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!
Strobe Tuner Pro: Guitar Tuner
Save hundreds of dollars for a physical strobe tuner and instead use this app.
Strobe Tuner Pro is the only tuner that shows the real stroboscopic effect on your device. It is extremely accurate, suitable for guitar, violin, bass, ukulele, viola, cello, banjo or shamisen. By purchasing it, you can save hundreds of dollars for a physical strobe tuner.
Professionals appreciate the Strobe Tuner Pro's accuracy, beginners quickly learn to tune instruments properly. Strobe Tuner Pro is easy to use thanks to an additional chromatic tuner that helps you when your instrument is way out of tune.
The chromatic and strobe tuners are independent, but both use the same input from the built-in microphone of your phone or tablet for their advanced algorithms.
Chromatic tuner
The chromatic tuner accurately detects the frequency of the tone played on your instrument, and shows it on the chromatic scale. The target strings are highlighted on the scale, and you can see how far is the tone from being in tune. When you get close enough, you can use the strobe tuner for fine tuning.
Strobe tuner
When the pattern is rotating to the right, it means the tone is too high, and you need to tune down. When it is rotating 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.
The algorithms of both tuners are independent - the chromatic tuner uses the Fast Fourier Transformation, but 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.
Tuning by ear
You can also play the reference tones using the buttons at the bottom of the screen. The tone is synthesized, and respects the setting of the concert pitch.
Instruments

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The tuner has been tested with many guitars, violins, basses, ukuleles, violas, cellos and banjos, and we constantly grow our test coverage with new recordings of the instruments. You can switch between the guitar and the violin tuning in the settings.
Professional guitar tuner
Other instruments: Violin, bass, ukulele, viola, cello, banjo, shamisen
Manual mode that works exactly as a physical strobe tuner
Suitable for beginners too
Awesome precision