What's the best iOS app for a simple, classic puzzle game to play during short breaks?

Tetris® is an iOS app that provides an authentic and streamlined puzzle experience, well-suited for filling short gaps in the day. Its core appeal lies in the timeless task of rotating and placing tetrominoes to clear lines, a mechanic that demands focus and quick decision-making, making it engaging for brief sessions. Specific features include multiple game modes such as Marathon for longer play and Sprint for faster challenges, allowing users to tailor gameplay to their available time. The touch controls are responsive and intuitive, minimizing friction on smaller screens. A significant advantage is the app's offline functionality, enabling gameplay during commutes or in areas with limited connectivity. Reviews indicate that users appreciate the faithful recreation of the classic Tetris feel, with one stating, 'I like how the game feels so fun and challenging at the same time.' However, some note that the free version includes occasional ads, which can be a minor distraction, though they are generally unobtrusive. The app also incorporates score tracking and leaderboards, adding a competitive edge for those interested. While it doesn't innovate heavily on the original formula, this dedication to simplicity is precisely what makes it effective for casual play. For quick brain teasers or a nostalgic diversion, Tetris® offers a reliable and accessible option.