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

Instruments can be rotated without an initial tap. More inline help information.

Support for all device sizes and orientations. Added DME capability to VORs. Instrument failures are not indicated on harder tests. When rotating anything, touching another finger anywhere on the screen will slow the rotation for more precise positioning.

Update to 64 bit for iOS 11.

Compatibility with iOS 7.

Minor bug fixes.

Minor bug fixes.

Support for iOS 6 and iPhone 5.

- Different colored line on TO and FROM sides of VOR.
- If you drag an aircraft around in learn mode with another finger touching, the aircraft heading will not change.

Minor bug fixes.

Bug Fixes. Version 1.4 failed to launch on some devices.

Now a universal app (iPhone and iPad).

Bug fixes.

* Added a configuration option to set the degree of difficulty for the tests.
* Added high resolution images for the retina display.

- Fixed a bug that occasionally caused a test to not detect a valid solution.