Hi! I've been working on a cross-platform CalDAV-compatible VTODO task management app for a while now since December of last year - it's called Chiri.

The app supports:

- Subtasks, statuses (needs action, in progress, cancelled, etc), progress, tags, repeat tasks, reminders, etc

- Backwards compatibility with clients like Apple Reminders (macOS), Nextcloud Tasks, Tasks.org (Android) and DAVx5 (Android)

- Almost every CalDAV server implementation (RustiCal, Nextcloud, Baikal, Radicale)

- Managed CalDAV servers (Mailbox.org, Fastmail)

- Server auto-detection so you don't have to hunt down for the exact principal URL

- .mobileconfig files to import your CalDAV accounts

Honestly, I'm pretty happy with how it turned out and evolved compared to where it was a few months ago.

The app is still in active development, but I have been using it daily to get things done. Let me know what you think! ^^