I have answered in the Telegram channels multiple times that is does not work correctly on mobiles, even if you set it up in desktop mode (and obviously is not recommended as you can easily damage your phone because of the heat). At least not for mining, for sending coins yes, you can do that with high degree of success.
The Androind app was not updated and that is no secret. There is a sort of monitoring app introduced that works OK though.

What would be nice is an updated Android App for staking. (as mining POW from the phone is purely an exercise, it makes no sense taking into account the difficulty on the network) But there are limited dev resources so if there are people from the community who would be interested into helping coding this part they will definitely be rewarded fairly in WEDB.

Anyway, I think the devs should also answer some of your questions in their own words as I am only speaking in my name alone.