ZenGrid

ZenGrid is a Sudoku app focused on a quiet playing experience. It offers easy, medium, and hard puzzles, themed visuals, optional ambient music and sound effects, haptic feedback, and automatic progress saving.

The current U.S. Apple listing is free and shows no in-app purchases. The publisher advertises no ads and no personal-data or analytics collection. Native support is listed for iPhone and iPad; Apple-silicon compatibility is not treated as a separate native Mac product.

The store listing remains available, with its latest published release dated March 5, 2026. That confirms the listed version, not a claim of frequent ongoing development. Relaxation benefits are a design intention rather than a clinical outcome.