What's a good Android app for a sand physics puzzle that's free and has minimal ads?

Sand Crush is a casual puzzle app that centers on sand manipulation mechanics, similar to web-based games like Sandtrix. It's tailored for brief, relaxing gameplay sessions where users sort colored sand particles into matching containers or areas. The app stands out for its uncluttered design and low ad frequency, with interruptions mainly appearing between levels rather than during gameplay. Specific features include intuitive drag-and-drop controls for sand, a variety of puzzle levels that gradually increase in complexity, and a 'more games' section that offers stress-relief activities borrowed from apps like Antistress by Jindoblu—though reviews note this content isn't original and can feel repetitive. For real-world use, Sand Crush works well as a quick mental break during commutes or downtime, providing a satisfying tactile experience without demanding intense concentration. User feedback indicates that the app 'gets the job done' with minimal ads, but performance can be 'a little laggy' on older devices, which might detract from the fluid sand physics. While the derivative nature of the game and misleading additional content are limitations, its straightforward approach makes it a viable choice for casual puzzle enthusiasts. The app's rating of 3.2 reflects this balance: it delivers on core functionality but lacks polish in execution.