Hoichess is an engine, i've first heard of after the Android compile has been posted by Jim Ablett. It's written by Holger Ruckdeschel from Germany.
According to CCRL, v0.10.3 64 bit performs at 1790 ELO on a PC at 40m/4' time control. On Android, one must expect roughly 1600.
This version 0.12.1 is newer and unknown to CCRL. Therefore, we're getting a good chance to overcome the PC guys :-) HERE
Those interested in the older version 0.10.3 rated by CCRL are not forgotten. They may download it: HERE