This app is a tiny bit buggy since this is a very first version for the iPhone. A “compass” button may not be working. After close zoom to the airport area to see its taxiways and stands layouts, IFR overlays may be vanished when switching to some another parts of the world map, which requires a restart to bring them back to work, sadly. However, I doesn’t really bother me. This app feels absolutely amazing. Map and charts are clean and crystal sharp. I’m having a real pleasure just discovering the map and clicking buttons here. It really feels like this app was made by people who really love what they are doing and who are ready to share theirs love with others through this amazing app. Can’t wait for my next flight sim session using this app from my iPhone, it will be terrific. Thank you so much:)