Oliver Janssen spent two years developing Muky, a kids audio app for iOS. What started as a side project to replace expensive Toniebox figurines became a full-featured application solving real parent frustrations. The app bridges physical simplicity with digital library access.

Janssen chose SwiftUI over cross-platform tools like Flutter for performance and direct Apple framework integration. Early versions suffered from poor onboarding and content discovery. Key improvements included guided setup, curated browsing, and QR code sharing to mimic physical media swaps.

The app moved from one-time purchases to subscriptions for sustainable revenue. Janssen handled design, code, marketing, and support alone, using Claude Code for assistance. Legal aspects relied on Apple's standard EULA. Test coverage remains minimal but functional for solo development scope.