While on my paternity leave, I've been rewriting my SatsPrice app with the help of Claude Code. The currently available (old) version of the app was written by hand in Swift with the Skip framework targeting iOS, macOS, and Android, but it proved difficult to maintain and build on. The unreleased (new) version uses Kotlin Multiplatform and targets all those platforms plus other desktop operating systems and the web. I was able to reach near feature parity at ~10x the speed with Claude Code. Just missing persisting currency preferences and I should be able to release. With the help of AI, I can likely more easily implement some of the feature requests that have piled up over the last year or so.