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 with a 3-day free trial at $3.99;
- Yearly with a 7-day free trial at $21.99;
- Weekly with a 30-day free trial at $3.99;
- Music One weekly subscription with a 3-day free trial for 9.99/weekly;
- Music One yearly with a 7-day free trial at $59.99;
- Monthly at $14.99.
- Payment will be charged to iTunes Account at confirmation of purchase.
- Subscription automatically renews unless auto-renew is turned off at least 24-hours prior to the end of the current period.
- The account is charged for renewal within 24-hours before the end of the current period.
- Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user’s Account Settings after purchase.
- The cost of renewal is equal to the value that “Apple’s App Store Matrix” determines as the equivalent of the subscription price in $USD.
- Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication.
- You can subscribe for unlimited access to our PRO services:
* Tune Guard™ for safe tuning;
* all instruments;
* all games.

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Terms of Service: https://gismart.com/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.