This app is great! Although, I do have a few suggestions to make
1. Add terminal buildings to major airports, like X plane 10.
2.Make it so you can operate levers in cockpit(I.e. Thrust, flaps, guidance computer, etc) like X plane 10
3.when you get near the gate an icon should appear that says tow in.once parked at gate, you should be able to call atc ground and request the jetway be pulled to aircraft. Then you can press buttons like board passengers, fuel up, empty lavatory, etc. Each should take a realistic but quick time( board passengers 5 mins, empty toilet 1min, etc.)
4.you can control a tug as well as your aircraft, but not at the same time, of course, and the tug must decouple before applying throttle. Also, the tug should be visible, like aircraft!
5. Add buildings in cities, like X plane 10
6. You should be able to turn off engines in systems, along with opening cargo and passenger doors as well as other crucial systems, like emergency landing
7. There should be a failures tab, like X plane 10
8.you should be able to make mayday calls in live, along with pan pans. It will automatially tell atc your issue without you having to select them. Failures such as gear failure, engine failure, bird strike, etc
All of these improvements will make infinite flight a much better simulator (it already is amazing but these would make it much better and realistic.)