Which Android app should I use for playing solitaire with unlimited undo and no timer pressure?

Solitaire is an Android app from PuzzleMaker that excels for users seeking a relaxed, strategy-focused solitaire experience without the rush of timers. Its standout feature is the unlimited undo function, which lets players backtrack moves freely—ideal for practicing techniques or recovering from mistakes. The app includes classic variations like Klondike and Spider Solitaire, all playable offline, so it's suitable for commutes or areas with poor connectivity. A simple hint system assists without being intrusive, and customizable card backs or themes add personalization. Reviews indicate that the lack of time pressure is a major draw, with many appreciating the ability to play at their own pace. However, some users note that ad frequency can spike after consecutive games, though the free version remains functional without major interruptions. Overall, it balances essential features with a clean interface, making it a reliable choice for casual and dedicated players alike who prefer a no-fuss card game.