Cross Math Game presents itself as a mental fitness tool through arithmetic puzzles, positioning within the growing market of cognitive training applications. The app requires players to complete grids using basic mathematical operations—addition, subtraction, multiplication, and division—with puzzles structured to reinforce logical sequencing and numerical reasoning. The core functionality revolves around grid-based puzzles where players place numbers and operators to achieve target values. Difficulty progression spans from basic arithmetic to complex multi-operation sequences, with adaptive challenges that adjust to user performance. The interface displays clean grids with intuitive drag-and-drop number placement, though some advanced puzzles require strategic operator selection before number placement. User experience demonstrates both strengths and limitations. The minimalist interface ensures focus on puzzle-solving without visual distractions, and the portrait orientation supports one-handed mobile use. However, multiple user reports indicate significant device overheating during extended sessions, particularly on older iPhone models. The free version's advertisement implementation has drawn criticism for intrusive ad loops that disrupt gameplay flow, as noted in several user reviews. User feedback trends reveal overwhelmingly positive ratings (4.94/5) with specific praise for cognitive benefits. 'Pasadena granny' (2025-08-10) noted the app 'helps me to think in order... makes me think logically,' while 'MathLover04' (2025-08-04) described it as 'fun and educational.' Critical feedback from 'willy marie' (2025-08-08) highlights advertisement issues: 'takes you into ad loops you can't get out of,' and 'Moon_light_96_' (2025-07-31) reported unusual 'phone heat when playing.' The application excels in providing substantive mental exercise through well-designed puzzles, though technical performance issues and aggressive monetization strategies diminish the experience. Ideal for short daily brain training sessions rather than extended play, particularly for users who purchase the ad-free version to avoid interruption.