Two things to call out: the first is it does not work if your phone is on do not disturb or silent/vibrate. He's aware of this and it's a permissions thing you need an exception for. He's applied for the exception but it's unlikely he'll get it because it's supposed to be for stuff that's like life or death. I think for his usage he's OK with that, and he has spent a lot of time working on it the past months so he just wanted to ship it at this point. The second is that it's obviously paid. I think that's fine if he had gotten the permission unblocked but I'd be a little hesitant to recommend buying it right now.