What are good Android apps to learn chess from scratch? Knowing nothing but the rules of chess, I'd like to start learning a bit more. Some kind of tutorial app for my Android smartphone would be perfect as I can use it anywhere. The app should give theoretical explanations of basic concepts and thinking patterns (like controlling the center, pawn structure etc.) and preferably mix in a lot of example positions to solve. Free would be great, but I also would't have a problem with paying up to 10€ if it's worth it. Any suggestions?
I would suggest LiChess. It is free (of charge and ads) and it has a website + android app. You can practice vs other opponents, solve tactic puzzles. They also have a learning section, where you can learn about simple strategic concepts.