Neat app, thanks for sharing. I assumed those APIs were what you'd hit to pull the data and it makes sense. I didn't realise some of the other info they look to gather internally at least, or be working on ("dwell time" for one).
If you're intending on sharing this further would suggest adding in the other Oneworld tiers eligible for the Club/F Lounges (in addition to Gold which might also be BAEC Gold for example).
Might be worth (if you're not already) planning to proxy those APIs via some middle service you control, so you don't end up having them lock down the web service from the public which is something I've seen happen in other settings once an app took off (though that was for public transport so had a likely bigger following)