Best free simple engine for analysis

I would like to download a free easy to use chess engine. Please tell me what one I should use and a link if possible.

If you have an android device there is an app called "analyze this" and it runs stockfish, the strongest open source chess engine.

What do you mean by "simple"? Stockfish is one of the strongest engines available and it's free. However, is is "simple"? I have no idea.

do lots of tactics trainer, u r a diamond player

go to tactics then settings, then change it to unrated then set 1000 - 1100 rating puzzles, practice them then do till 1500. Then start analzying stuff.

Do chess mentor also, take it slow. Use ur diamond membership well, see the video lessons for chess.

he wants an engine, not tips on analzying

ya stockfish is good, on a device or computer

Thanks I have android and will use this now.