Pixel Coloring-Color by Number positions itself as a digital art therapy sandbox application designed for stress relief and creative expression. Developed by Coloring Game Studio@RabiGame, the Android application transforms the traditional paint-by-number concept into a mobile experience that emphasizes user control and relaxation over competitive gameplay elements. The app maintains a 4.4-star rating through its focus on accessibility and mental wellness rather than gaming challenges. The application's core functionality revolves around filling numbered pixel grids with corresponding colors from a provided palette. Recent feature additions include auto-color switching that automatically selects the next required color, piano sound accompaniment during coloring sessions, and a diamond-based economy system. Users can accumulate in-app currency through regular use, which can be redeemed for permanent ad removal (2000 diamonds) or additional artistic tools. The artwork library contains numerous pixel art images categorized by complexity and theme, with regular content updates noted in user feedback. User experience demonstrates thoughtful design choices for stress reduction. The interface employs large, clearly numbered pixels suitable for various screen sizes and lighting conditions. Coloring mechanics require simple taps rather than precise strokes, making the application accessible for users with varying digital dexterity. Real-world usage patterns show the app being utilized during commute times, work breaks, and evening relaxation periods, with sessions lasting from brief 5-minute intervals to extended coloring periods exceeding an hour. User feedback trends reveal strong appreciation for continuous feature improvements. Silvia's May 6, 2025 review highlights excitement about auto-color switching and piano sound additions, noting 'this game keeps getting better each and every day.' Beckymtown's May 1, 2025 review confirms the ad-removal system functions as advertised after diamond accumulation. However, Jess Dayus' April 19, 2025 review indicates some feature regression concerns regarding unlimited hints previously available. These reviews collectively suggest active development but occasional inconsistencies in feature maintenance. The application excels in providing a genuinely pressure-free creative outlet with substantial content variety. Strengths include the permanent ad-removal option through earned currency rather than mandatory purchases, regular feature updates, and effective relaxation mechanics. Limitations involve occasional feature inconsistencies and the repetitive nature inherent to the genre. Ideal use cases include stress management during short breaks, developing color recognition skills, or as a digital alternative to traditional coloring books for adults seeking structured creativity.