Paint by Number: Coloring Game by Oakever Games represents a significant player in the digital art therapy space, boasting over 100 million global users. This Android application transforms mobile devices into interactive coloring books, positioning itself as both an entertainment platform and mental wellness tool through structured artistic expression. The core functionality revolves around a numbered coloring system where users match colors to corresponding numbered sections. The application features an extensive library exceeding 30,000 images across multiple categories including fantasy scenes, natural landscapes, animal portraits, and geometric patterns. Each template undergoes professional artistic curation, ensuring high-quality line work and color palettes. The interface includes zoom capabilities for detailed sections, color picker tools, and a hint system that assists users in identifying correct number-color matches. User experience demonstrates thoughtful design with intuitive navigation and minimal learning curve. The interface employs clean visual hierarchy, placing coloring tools at the bottom while maintaining the artwork as central focus. Real-world usage patterns show consistent engagement during stress relief sessions, bedtime routines, and family activities. Performance metrics indicate smooth rendering even on complex images, though device-specific variations may occur on older hardware. The ad-supported model presents non-intrusive advertisements that typically appear between coloring sessions rather than during active engagement. User feedback trends consistently highlight therapeutic benefits and content variety. Diana Marcelo (September 2025) notes the multi-generational appeal while suggesting interface improvements regarding accidental hint activation. Connie Markwitz (July 2025) emphasizes long-term usability and stress reduction qualities, having used the application since 2010. Charlotte B (July 2025) praises the relaxing experience while requesting expanded diversity in human representation within the image library. These reviews reflect a 4.7-star average rating driven by satisfaction with content depth and emotional benefits. The application excels in providing accessible artistic expression with professional-grade content, though opportunities exist for improved hint confirmation mechanisms and expanded cultural representation. Ideal use cases include stress management routines, family entertainment, and casual artistic practice. The balance between free content and optional purchases maintains accessibility while supporting ongoing development of new artwork collections.