I also play chess by AI Factory and i play level 4 a lot (that's the level i could beat). I think level 4 is around 1200-1400 or even lower (thats my rating here at chess.com). I've tried playing level 6,7 and above but the engine's play, particularly the opening, is very good. I think it is somewhere around 1600 and above.
Chess game developed by AI Factory Limited - difficulty translated to rank

I started playing Chess by AI Factory about 3 weeks ago. I was able to repeatedly beat 4 without any problems. So it’s definitely less than 1200 rating. Against level 5 I never had a chance, and was usually down at least a piece within the first 15 moves. So it’s above 1200.
I’ve been doing a ton more studying instead of playing, and now I can beat level 5 about 1/3 of the time. When I play more games and my rating catches up, I’ll have a better idea of level 5’s rating.

I used to play with the Mephisto Advanced Travel Chess Computer (MATCC) but was always beaten at level 5. At the game Chess by AI Factory, I find that the difference between level 4 and level 5 is also huge and very hard to beat. To test its real strength, I arranged several matches between the MATC at level BEG5 against the game Chess by AI factory on my I-Phone at level 5. Each time the MATCC won, not giving the AI Factory Chess a single chance. But what elo-rating would level BEG5 of the MATCC have? It is said that at the higher level its elo is around 2000. Therefore, perhaps somewhere above 1200 is a reasonable guess.

you are a player rating around 700 Elo if you consider yourself beating up level 4 of A1 factory chess. its a little bit hard to develop yourself on chess. keep playing as well as keep studying. to me its easy to beat the difficuly level 10 but it takes time to become an expert buddy. keep playing...
I play the chess game programmed by AI Factory Limited which is downloadable in the android marketplace. players can adjust their difficulty 1-10 (1 being easiest and 10 hardest). to anyone who has experience with this game and understands how the official chess ranking system works, how would you break down a player's rank according to the game's 1-10 scale? so for instance if i had a 70% win rate in difficulty level 4, how would you rank me as a player?