In the past few years, we have covered a whole host of chess apps for iPhone & iPad that let you play against a strong engine, improve your tactics, solve puzzles, and play Fischer Random Chess. Chessify is a handy app that lets you scan chess diagrams with high accuracy. You also get Stockfish 10 to analyze positions. The engine is cloud-based, so you get deeper analysis.
The app lets you keep up with top chess tournaments live. You can also use it to scan printed and digital chess diagrams. Chessify is available as a free download with a paid add-on.[where to download it]