What's the best Android app for simple water flow puzzles that don't require quick reflexes?

Water Out Puzzle is a physics-based puzzle game where players manipulate pipe connections to guide water from source to destination. The app excels at providing methodical challenges that don't demand quick reflexes or timed responses. Players rotate and connect various pipe pieces across increasingly complex layouts, with water physics that behave predictably for logical problem-solving. The game's strength lies in its straightforward mechanics - there's no complicated tutorial needed, and the visual feedback of flowing water provides immediate satisfaction when solutions work. However, user feedback indicates advertisements appear after completing levels, which some players find interrupts the relaxed pacing. The puzzle designs gradually introduce new pipe types and obstacles, maintaining engagement without overwhelming complexity. For casual players seeking methodical spatial reasoning challenges, Water Out Puzzle delivers satisfying brain teasers with clean visuals and intuitive touch controls. The absence of time limits allows for thoughtful experimentation, though the ad frequency mentioned in reviews might deter some users from extended sessions.