This update from Apple will improve the functionality of this app. No new features are included.

Fixes for iOS 8.3

Support for iPhone 5 aspect ratio displays

Added quick zeroing button for fine tuning.

Now fully chromatic!  A lot of players expressed interest in using the app for more than just Traditional Irish Music, so I expanded the drones to have a fully chromatic range starting on a low A.

Fixed possible crash under iOS4.

Added the #1 most often user requested feature:

You may now adjust the tuning of the drones and the just-intonation based interval drones +/- 50 cents in one-cent increments using a new fine-tuning slider control just below the drone puck.

The selected offset in cents is displayed above the right side of the tuning slider.

If after using the app for a few days, please consider posting a review and rating on the app store!

You can now play along live with music from your iTunes collection.

Two new lower intervals for a huge sound: Contrabass octave and Bass lower fifth.