Hi! Appics uses steem blockchain but they are having a few issue lately due to some nodes not working (not sure exactly what is going on in technical terms)
There is both an android and an ios app, you can go from their website and after you insert your information they send you the link for downloading the android version.
I suggest that you message them either on telegram or on their facebook
I.e. I very much believe in the app, I hope that they have some plans for correcting the issues of connectivity and maybe they are even thinking of moving to another blockchain - not sure.
Let me know if you need any extra help, I am using appics for many months now :)