I used this app on my flight from Amsterdam and in 1 day it was wrong twice. Gate was changed, which was announced with a notification but inside the app it was not updated so when notification was dismissed I could not check the gate. Boarding time doesnt reflect really airport situation but airline defaults, so doesnt add value. I give 3 stars for showing off my Apple Watch over lunch.
Strab about App in the Air: Top Travel App, v5.1