Hexx: Merge comes from Danny Birch.  It's a lot like Kami 2 (see link below).  The object is to tap regions to change colors and eventually get everything to just 1 color.

There are 102 levels.  The first 30 are free.  I did them in about 15 minutes.  After that, the rest cost $.99.
I really like the graphics!

https://itunes.apple.com/us/app/hexx-merge/id1363773600"mt=8

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