Ah forgot to tag nostr:npub1jdgclywl55wc4neey97de57jenghsseuh8njx6z5f2kdwsfvk5xqhd2mys ! timechaincalendar.com 🔥
If you open it in Safari on an iPhone (not sure about Android) and tap the Share icon at screen bottom, you can select Add to Homescreen and it becomes a PWA (Progressive Web App), and behaves like an app on your phone :)