https://casto.app/ 2026-07-26 weekly 1.0 https://casto.app/casto-macos-screen.jpg Casto macOS app screenshot Casto showing Discover, Tags, Playlists, and personal music library streaming. https://casto.app/casto-web-discover.jpg Casto Web discovery view Casto Web showing Recently Added and Rediscovery shelves from a personal music library.