This really is, by far, my favorite of the "digimon on your phone" games, this is the one that most closely replicates what a proper digimon v-pet would feel like on a smart phone, i love the hands-off combat, the timing, the various upgrades you can get over time to make raising new mons earlier, everythings great.
If I had one complaint though, its please, please tweak the HP training somehow. I dunno if I'm just stupid or bad at it, but i can reliably get perfects in the other two while HP requires these weird frame-perfect inputs to dodge sometimes if you get unlucky. Perhaps make that a bit more forgiving or make the time between drops a little longer. Or don't, it's still my favorite app and this is hardly a deal breaker.