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191 reviews
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About this app

"Playing the guitar is fun, but tuning it is a pain ..."
G-Tuner will surely be the best tuner for players who think so.

In many tuner applications so far, the indication tends to be unstable due to noise, which prevents the smooth tuning.
G-Tuner greatly reduces the influence of noise by our pitch detection technology specialized for the microphone input, and it makes players free from the frustration.
And also about basic performances such as accuracy and responsiveness of indication, we have achieved a high level that can be used in professional applications.
While the interface is simple enough even for beginners, it also offers some practical options to meet advanced requirements.

### Specification ###
- Supported instruments: Any plucked string instruments such as Guitar, Bass guitar, Banjo, etc.
- Pitch accuracy: ±0.1 cents (at 440 Hz)
- Pitch range: E0 to E7 (Note: 4th str. of bass = E1, 1st str. of guitar = E4)
- Calibration range: 390 to 490 Hz (1 Hz step)
- FLAT / CAPO (shift tuning): -5 to +7 frets
- Display modes:
    - Strings mode
    - Chromatic mode*
- Tolerance setting:
    - MED (in-tune = ±5.0 cents)
    - HIGH* (in-tune = ±2.5 cents) (The value is selectable)
- Altered tuning*:
    - In addition to preset data for guitar, bass guitar, banjo, mandolin, ukulele
    - user-defined tunings can be added.
- Other features:
    - In-tune notification
    - Tuning state indication for each string
    - Detailed pitch information* (detected pitch, target pitch, pitch error)

* these features are advanced options
We offer a free trial period of 30 days for these options.
Updated on
Feb 29, 2024

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
No data collected
Learn more about how developers declare collection
Data is encrypted in transit
Data can’t be deleted
Committed to follow the Play Families Policy

Ratings and reviews

182 reviews
Bee S
July 5, 2021
I updated this app but the new version is unstable and does not respond correctly to the sound of the strings. When I tried to tune a string, the indicator kept going flat and sharp. I have reverted back to the older version 1.1.1
20 people found this review helpful
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July 21, 2021
We have identified the part that may have caused the problem and fixed it. The version 1.3.0 is now available. We would appreciate it if you could try it and give us feedback. Thank you
Cody Scott
November 18, 2023
Awesome simple to use tuner! I have several on my phone and I have numerous actual clip on tuners and this one is easy to see (I've only got use of one eye). My dad even said it's one of the best tuners he's used as well and he's in his early 60s!
2 people found this review helpful
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Jean-Thomas de Voghel
January 12, 2024
Great guitar tuner that does the job. The UI and design is by far the bast of all the phone tuner apps out there, really nice interface, great job !!
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What's new

* Improved pitch determination accuracy
* Bug fixes
* Android 13 is now supported.
* Android 4.4 or lower is no longer supported.
* Extended the range of string numbers. (1-10 strings)
* Fixed the problem that the ♯ sign is not displayed.
* Compatible with Android 12.
* Improved stability.
* Bug fixes