Before playing this I had ZERO idea how to play Sudoku. The game has neat tools designed to ease you into Sudoku and also a lot of QoL Sudoku "improvements", like autofilling places with a single option, that make the gameplay more fast-paced and snappy. The autofill feels especially satisfying with the Iphone haptics. There are also tutorials available, seperate ones for each difficulty level, that gradually explain more mechanics to you.

Highly recommend this, especially for people that don't know how to play Sudoku and want to get in on the fun.