Honestly, an interesting mobile game with great support from the devs and not too different from the main SMT games.

The plot and characters are obviously reduced in size an quality because of this game's mobile nature, but there's still much to be appreciated.
The demons and areas models are good, there's voice acting, there's a great community and a lot of modes to play with (about 6 or 7 modes). I also like the overall vibe of the game.
The soundtracks is very good, in line with the every other Megami Tensei game.