Color Oasis - Color by Number presents itself as a digital coloring book application that transforms the traditional paint-by-number concept into a mobile experience. Developed by Tap Color Studio for Android devices, the app positions itself in the crowded relaxation app market by combining artistic creation with meditation elements, featuring a 4.9-star rating that suggests strong user satisfaction despite some noted limitations. The application's core functionality revolves around selecting from hundreds of numbered templates across multiple categories, including the popular 'Childhood Friends' collection mentioned by users. Each section corresponds to a specific color, which users tap to fill, gradually revealing complete images. The interface includes color palettes organized by theme, zoom capabilities for detailed work, and progress tracking. A distinctive feature is the ambient background music that changes according to selected themes, creating what the developer describes as a 'Zen world' experience. User experience demonstrates thoughtful design choices for accessibility, particularly for those with physical limitations as mentioned in Lynn Minor's June 2025 review. The interface employs large, clearly numbered sections and intuitive color selection, reducing the precision required compared to traditional coloring apps. However, as Kathy Johnson noted in August 2025, the organization system lacks bookmarking functionality, requiring users to manually scroll through extensive galleries each session. The ad implementation shows variability, with Sue J's June 2025 review noting problematic ads that were subsequently addressed by developers. User feedback analysis reveals consistent praise for the visual quality and relaxation value, though technical issues periodically emerge. Melissa Willis's June 2025 review appreciated the imagery and music while noting external ad redirect issues, suggesting possible third-party integration problems. The July 2025 review by Nakuitsi VT highlighted the unusual inclusion of theme-specific music and minimal ad interruption as standout features. These reviews collectively indicate that while the core experience receives strong approval, interface navigation and ad implementation represent ongoing development challenges. The application demonstrates clear strengths in content variety and atmospheric design, making it particularly effective for stress reduction and casual creative expression. Limitations primarily involve navigation efficiency and occasional advertising disruptions, though developer responsiveness to these issues appears evident in review updates. Ideal usage scenarios include short relaxation sessions, artistic engagement for those with physical limitations, and as a digital alternative to traditional coloring books for adult users.