I think the idea is a good one - and the normal price of ninety-nine cents makes it easily available and reasonable. Not much of a profit, eh?
After discussion amongst the forum moderators, we note that though FT has a prohibition against purely commercial posts, we have allowed a number of posts / threads on very related products that may be free or paid - KVS, ExpertFlyer, etc. come to mind. Given this is by an FT member who developed an app specific to this forum's airline and whose sole reason for posting is not to sell products, but rather developed the app some time after becoming a member and increasing activity on AA, offers 20 members free access, it seems appropriate to allow this thread.