Coloring Book: Paint by Number by Easybrain represents a significant player in the digital mindfulness application market, offering a structured approach to creative relaxation through its color-by-number mechanics. The application transforms complex artwork into manageable numbered sections, providing users with a guided yet creatively satisfying experience that requires minimal artistic skill while delivering maximum therapeutic benefits. The application's core functionality revolves around its extensive library of professionally designed templates spanning multiple categories including animals, landscapes, and abstract patterns. Each template features precisely numbered sections corresponding to a curated color palette, with users completing artworks by matching numbers to colors. The interface includes zoom capabilities for detailed work, an automatic color fill mechanism for precision, and a progressive saving system that allows users to resume projects seamlessly. Additional features include daily new artwork releases, seasonal collections, and a color mixing system that maintains the original artistic vision while providing user customization options. User experience demonstrates thoughtful design considerations with intuitive navigation and minimal interface clutter. The application employs a soft color scheme and subtle animations that enhance the meditative quality without distracting from the creative process. Real-world usage patterns show peak engagement during evening hours and weekend periods, suggesting the application serves as a wind-down tool after work hours. The haptic feedback system provides subtle confirmation of color placement, while the absence of time constraints or scoring mechanisms reinforces the stress-free environment the application aims to create. User feedback trends consistently highlight the application's effectiveness as a relaxation tool, with particular praise for artwork quality and interface simplicity. Marty Cox's August 20, 2025 review notes 'awesome artists and artwork,' reflecting the common appreciation for the professional-grade illustrations. The 4.9-star aggregate rating stems from widespread satisfaction with the application's ability to deliver on its core promise of providing a peaceful creative outlet without technical complications or excessive monetization pressure. The application's primary strength lies in its successful translation of traditional coloring therapy into digital format with precision tools and professional artwork. Limitations include the inherently repetitive nature of color-by-number mechanics which may not satisfy users seeking freeform creative expression. The application serves ideal use cases for individuals seeking structured relaxation, those with limited artistic confidence, and users looking for a digital alternative to physical coloring books during travel or downtime.