A Few I've Got on Touch Brain Freeze Vexed Tangram Pro TanZen Quadrix Brain Puzzle LightBot Gemmed (going to add this but more of a game than puzzle but have to figure out stuff) OpenDoors (might still be free) Pikey (just released-graphics meh....but difficult) Enigmo Diamond Hunter
more puzzles I love puzzles too. I have all of these and they were under $5 so mix and match A lot of these have lite versions or desktop/flash versions so try before you buy. IQ Boost Ivory tiles Primrose, has a free desktop version Pipes Tatomic Alio Wood cutter Metasquares Fantastic Contraption Gem spinner Drop 7 see chainfactor flash game Combination Nurikabe Tanzen Kraut Trism Blocked Gaia Gemmed The Plateau Subway Shuffle Phit Polymino Puzzles Alphabetic