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Guitar Tuner - Ukulele & Bass

By Gismart

This app is only available on the App Store for iOS devices.


DoubleTune is an advanced tuning app created by professional musicians. It’s suitable for tuning a range of string musical instruments, learning new chords and refreshing your memory of already-learned ones. Competitive educational games are equally useful for beginners and mastered guitar players. One way or another, DoubleTune is a must-have app for any musician.

Made by experienced guitarists, it is simple, fast, intuitive and accurate. It’s perfect for tuning acoustic, electric and bass guitars, along with ukulele, banjo, violin and cello.

- Choose between a range of tuning presets and modes:
- Tune Guard™;
- Standard and Popular tunings (6 and 12 strings);
- Drop and Double Drop;
- Open, Modal and Lower;
- Ukulele tunings;
- Bass guitar tunings;
- Chromatic tuner;
- Auto and Manual modes;

Tune Guard™ is a smart feature that helps you tune safely. It warns you with both visual red signal and string highlighting when this string is too tight and is about to break. The mode is designed to help beginners and inexperienced musicians save their strings, time and money.

You can easily tune:
- Electric and Acoustic guitars;
- Western and Classic guitars;
- Bass 4 and 5 strings;
- Ukulele;
- Violin;
- Cello;
- Mandolin;
- Viola;
- Balalaika;
- Banjo;
- And any other string instruments.

Get the most out of DoubleTune games:
- Learn chords! Hone your skills and get familiar with many of common chords. These entertaining games focus on chords and chord diagrams. You can easily transfer this experience to real guitar playing!
- Ear training. Learn basics of guitar music theory in a fun way. Master your musical hearing and chord recognition ability with the help of quizzes.
- Stay competitive and try to get the best score in less time!

Great for professional and beginner guitarists! Enjoy tuning your instruments at the astoundingly high level.

The app contains the following subscription options:
- Weekly, monthly & annual*
- Free trial subscription is automatically renewed unless cancelled 24 hours before the renewal
- Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication
- Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user’s Account Settings after purchase

Privacy Policy:
Terms of Service:

*Price are equal to the value that "Apple's App Store Matrix" determines is the equivalent of the subscription price in $USD.

* Tune Guard™ feature does not guarantee 100% safely tuning. Gismart Ltd. takes no responsibility for causing any damage to your strings.

What's New in Version 3.1

We are glad to present you our subscription system. We did our best to maximize convenience and productivity - now you have ALL features in a tap, you don’t need to wait and overpay!
- You get different features (games, additional settings, instruments) ALL at once.
- You choose subscription period that fits you most (week, month, year, lifetime).
- Tuning algorithms and sound of the instruments improved.
- Advanced performance and minor bugs fixed.

Tune with us!


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Customer Reviews

Used to be good

I got this app and everything on it was free, then you did an update then I had to buy all the tunings for $3.99 okay whatever so I did. Then you do another update where I can’t use anything without paying $7.99 weekly. Lost another loyal customer. Anyone reading this go check out guitartuna 🤙🏼


It’s a long way from a pitch pipe! Wicked convenient to have right on my phone.


Are you kidding me? Now there's a stupid subscription that costs a lot more money than before?! This is especially stupid since I did pay for the whole package and now everything is locked because of the new update. Thanks a lot, IDIOTS! Waste of money!!

Guitar Tuner - Ukulele & Bass
View in iTunes
This app is designed for both iPhone and iPad
Offers iMessage App for iOS
  • Free
  • Category: Music
  • Updated:
  • Version: 3.1
  • Size: 108 MB
  • Languages: English, French, German, Italian, Japanese, Korean, Portuguese, Russian, Simplified Chinese, Spanish
  • Seller:

Compatibility: Requires iOS 9.3 or later. Compatible with iPhone, iPad, and iPod touch.

Customer Ratings

Current Version:
All Versions:

Top In-App Purchases

  1. Try accurate Tuner$7.99
  2. All In One$5.99
  3. Guitar$2.99
  4. Ukulele$2.99
  5. 4-String Bass$2.99
  6. Safe Tuning$2.99
  7. All games$2.99
  8. 12-String Guitar$2.99
  9. 5-Sring Bass$2.99