Inverti

Inverti is an iOS version of the classic board game Reversi (also known as Othello). Tap one of the small green dots to place your white chip on the board. All the black chips that lie directly between the chip you placed and another white chip "flip over" to become white. But beware the brain of Inverti, which is gonna try to do the same thing right back to you.
Inverti features 3 skill levels, two starting positions, a Score Log graph, and works on any iOS 9+ device, including the iPhone X.