Would have given it a 5 star, but...
It's generally a very good app with most of the acronyms covered… but the FIR boundaries listings are extremely poor. If you do a search for FIR boundary names outside USA, you will most likely get nothing… just to name 3 in Asia, try searching for WMFC (Lumpur) or WSJC (Singapore) or WAAF (Ujung) and you will get NOTHING at all. If they work on this, I would give them a 5 STAR for sure!!