Toca Boca Hair Salon 4 represents the latest iteration in Play Piknik's longstanding series of creative play applications for children. Positioned within the Piknik subscription ecosystem, the app continues the franchise's tradition of providing open-ended beauty salon simulation without rules, scores, or time limits. The application maintains Toca Boca's signature approach to digital play, focusing on experimentation rather than structured gameplay. The core functionality centers around a comprehensive suite of styling tools including hair clippers, scissors, blow dryers, and coloring sprays, alongside makeup applicators and facial decoration options. Users can select from multiple diverse characters featuring different hair types, skin tones, and facial features to serve as virtual canvases. The tools respond with realistic physics - hair grows back after cutting, colors blend when overlapped, and styling products create temporary textural changes. All creations can be saved to a virtual gallery and shared through device-native sharing capabilities. User experience demonstrates thoughtful design for young audiences with large, colorful interface elements and intuitive drag-and-drop interactions. The absence of written instructions promotes discovery-based learning, though some users report occasional interface glitches during extended play sessions. Real-world usage patterns show particularly strong engagement during creative experimentation phases, with average session times ranging from 15-30 minutes based on observational data. The offline functionality provides reliable access despite occasional performance issues noted in user feedback. User reviews reflect generally positive reception with specific praise for creative freedom. Suzanne Lindsay's June 2025 review notes long-term enjoyment despite acknowledging potential glitches, while Rose Reid's contemporaneous review emphasizes the extensive customization options. Alisa Alifanova's July 2025 four-star review highlights initial character access limitations that were resolved through updates, demonstrating the developer's responsive maintenance approach. The 3.8 aggregate rating suggests consistent satisfaction with minor technical reservations. The application's primary strength lies in its promotion of creative expression without commercial interruptions or competitive pressure. However, the requirement for full Piknik subscription access to unlock all content represents a significant limitation compared to previous standalone versions. The ideal use case involves children aged 6-10 seeking unstructured creative play, particularly those interested in beauty and styling concepts. Performance considerations include occasional stability issues during complex styling operations and the storage requirements for saving numerous creations.