Pixel Art - Color by Number represents one of the pioneering digital coloring applications on Android, developed by Easybrain. With over 40,000 available artworks and a claimed position as one of the first major entrants in the mobile coloring space, the app has established itself as a significant player in the relaxation and casual gaming market. The application leverages the established paint-by-number concept, transforming it into a digital experience that combines artistic expression with structured, meditative activity. The core functionality revolves around selecting numbered sections corresponding to specific colors, with users progressing through increasingly complex artworks. The application distinguishes itself through its massive content library, featuring categories ranging from animals and landscapes to abstract patterns and pop culture references. A notable feature includes the ability to create custom pixel artworks from personal photos, though this functionality requires stable internet connectivity for image processing and loading. The color palette system employs a straightforward interface where users tap numbered zones to automatically fill them, with error detection highlighting incorrectly colored sections. User experience centers around simplicity and accessibility, with intuitive navigation and minimal learning curve. The interface employs a clean, grid-based layout that scales effectively across various Android device sizes. Real-world usage patterns indicate most sessions last 15-45 minutes, with many users reporting the application as part of their daily relaxation routine. However, the experience is significantly impacted by advertising frequency, particularly between artwork completions, which has prompted users to develop workarounds involving disabling internet connectivity during extended sessions. User feedback consistently highlights the tension between the application's relaxing core experience and its advertising implementation. Anaya Hassaan's July 2025 review notes the advertising frequency upon completion but also identifies the offline workaround. Silvia's June 2025 review acknowledges recent improvements in ad frequency reduction while requesting additional functionality for error correction. Multiple reviews from July 2025 (Bruno Cesteiro, Ashley Quadros) emphasize the application's stress-relief benefits, though Jr Roff's feedback criticizes the motivational emoji system as essentially advertising notifications. The application's primary strength lies in its extensive content library and genuinely effective relaxation mechanics, making it valuable for stress relief and casual creativity. Significant limitations include advertising frequency that disrupts the meditative experience and dependency on internet connectivity for full functionality. The ideal use case involves prepared offline sessions where users download desired artworks beforehand and disable connectivity to maintain uninterrupted coloring flow, particularly during extended relaxation sessions or commutes.