What's a good iOS app for a tile-matching puzzle that's both relaxing and mentally engaging?

Mahjong Wonders™ is a polished iOS puzzle app from Nebula Studio that focuses on traditional mahjong solitaire, designed to offer a soothing yet intellectually rewarding experience. Its core appeal lies in time-free gameplay, allowing users to match tiles at their own pace—making it suitable for short breaks during workdays or winding down in the evenings. The app features a range of board layouts that gradually increase in difficulty, accompanied by tools like undo options and hints to support players without pressure. User reviews consistently highlight its dual nature; for instance, many note it as 'relaxing yet mentally stimulating' and mention how it can 'take all your time,' reflecting high engagement during commutes or leisure moments.

Specific features include minimalist visual designs that reduce visual clutter, daily challenges to maintain variety, and an ad-supported free model with optional purchases for ad removal. However, some limitations exist: banner ads in the free version can occasionally interrupt flow, and the background music may feel repetitive after prolonged sessions. Additionally, while the gameplay is accessible, newcomers to mahjong might need a brief adjustment period to grasp tile-matching strategies. Despite these minor drawbacks, the app maintains a strong 4.87-star rating, indicating widespread satisfaction. For anyone seeking a dependable puzzle app that balances relaxation with mental exercise, Mahjong Wonders™ provides a solid, well-rounded option on iOS.