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https://itunes.apple.com/en/app/id1155868585
feature:
1.It can solve puzzle step by step, and show the solving techniques like PAIR/WING/UR/AIC...
2.10000 fixed puzzles, and endless random puzzles.
3.Supports 4X4, 6X6, 8X8, 9X9 grid sizes.
tarek wrote:The app looks slick & suggests the programmer(s) has experience in doing these sort of apps before. The idea of incorporating human-like techniques is good but I didn't download to test.
Well done & good luck
Tarek