Colchess is written by Colin Frayn from England, like Beowulf which is just ported to Android by Jim Ablett. Although the name appears familiar to me when i dig deep into my old memories, i don't have any idea remaining about its strength. The engine is quite old and a retro taste is guaranteed.
Download Colchess: HERE
PS: Just tested with Chess for Android. At 5 sec/move, it uses average time. Regarding Fischer clock, it simply gets flagged easily. Colchess is only eligible for engine tournaments with fixed time per move setting.