What's the best iOS app for a casual puzzle game that's both relaxing and addictive?

Sand Crush is a puzzle game from Wonderful Studio that focuses on simple, engaging mechanics like matching and popping colorful bubbles, making it ideal for users seeking a relaxing yet addictive experience. The app's design prioritizes accessibility, with intuitive controls and vibrant visuals that create a calming atmosphere, perfect for decompressing after a busy day or filling idle moments. Specific features include level-based puzzles that gradually increase in difficulty, offline play capability for uninterrupted sessions, and a reward system that offers occasional boosts without overwhelming complexity. Users report that the game lives up to its advertisements, describing it as 'fun and honestly kind of addictive' in reviews. However, the experience is punctuated by frequent ad breaks, which some find disruptive, though many note the ads are tolerable given the free-to-play model. For short bursts of gameplay—such as during commutes or waiting periods—Sand Crush balances entertainment with minor monetization trade-offs, delivering consistent enjoyment despite the intermittent interruptions.