Which iOS app is good for a quick number puzzle game that I can play offline on the subway?

Number Match is a straightforward puzzle game focused on connecting matching numbers on a grid until it's cleared. For commuters seeking offline entertainment, its core appeal lies in not needing WiFi or cellular data, a feature explicitly praised in user reviews. The gameplay is simple to learn but becomes progressively more challenging, requiring players to plan their connections strategically to avoid dead ends. This creates a satisfying mental exercise that can fill short or long gaps in a journey. The ad-supported model is a noted limitation; while some users report ads that pop up frequently, others find them minimally intrusive. A significant user-requested feature that's currently missing is a dark mode or customizable backgrounds, which would improve late-night or low-light play. Despite this, the game's fundamental mechanics—tapping and dragging to link identical numbers—are perfectly suited for quick sessions. Its pick-up-and-play nature means no complex tutorials are needed, and progress is saved locally, allowing players to resume their game seamlessly. For subway rides or flights where connectivity is unreliable, Number Match provides a reliable and engaging distraction.