Number Master: Run and Merge presents a novel twist on the endless runner genre by incorporating numeric absorption mechanics. Developed by KAYAC Inc., this iOS title challenges players to strategically grow their numbers while navigating increasingly complex obstacle courses. The game occupies a unique position in the mobile gaming market by blending mathematical progression with reactive gameplay, creating an experience that appeals to both puzzle enthusiasts and action game players. The core gameplay revolves around swiping to move a numeric character across procedurally generated levels. Players absorb smaller numbers upon collision while avoiding larger numbers that reset progress. Environmental hazards including electric saws, bridges, and ditches require precise timing and strategic movement. The progression system culminates in wall-breaking sequences at each level's conclusion, providing satisfying payoff moments for successful numeric accumulation. The game implements a free-to-play model with optional advertisements between attempts. User experience demonstrates polished touch controls with responsive swipe mechanics that translate well to mobile play. The interface maintains clarity through color-coded number indicators and visual feedback during absorption events. Real-world usage patterns suggest the game suits short play sessions of 5-10 minutes, with difficulty scaling appropriately across progression tiers. The offline functionality noted in user reviews enables gameplay in connectivity-limited environments, enhancing accessibility. User feedback trends indicate strong appreciation for core mechanics despite advertising concerns. Reviewer Sksjdndisnen (2025-06-15) specifically praised offline functionality while noting frequent advertisements. Multiple reviews including Bella @$ (2025-06-23) highlighted satisfaction with high-score progression systems, though some users like ( =ω= )(＃＞＜) (2025-06-08) expressed frustration with age restrictions and advertisement frequency. The consistent five-star ratings suggest the core gameplay successfully outweighs monetization criticisms for most players. The game demonstrates strengths in innovative mechanic integration and responsive controls, though advertisement frequency presents a notable limitation. The balance between challenge and reward maintains engagement, while the offline capability expands usability scenarios. Ideal use cases include commuters seeking quick gaming sessions and players preferring numeric puzzle elements over traditional runner gameplay. The experience would benefit from adjustable difficulty settings and reduced advertisement frequency to address common user concerns.