Was curious so Iooked up the app's site.
Apparently the devs claim they can't release it on Android because "There's no way to be anonymous on the play store", but it's even more impossible to be anonymous on the platform they've released. That's how you know the developer is incredibly stupid and/or shady as hell- because they've never even heard of Fdroid?
Makes me think the app is a troll/trojan horse (not as in infection, trojan horse as in it has alterior motives)
The Drumpf crew "losing it" over the app just makes it more questionable. They love to create a firestorm so people talk about the thing "they definitely don't want you to use!!" to get people to do things...