has anyone compared this app against aTello App and which is better, pros & cons?
But maybe I'm a bit biased.
You can check TelloFpv for free, just download the demo version.
One con for TelloFpv: I won't do certain features that aTelloPilot has. I can't see how to make face tracking, gyro control, headless, headtracking, TTS and a few other features work well enough to be useful.
I don't have a PS3 controller but AFAIK it works -maybe search the forum. If it works then button mapping is done in the app.