This app has been invaluable for keeping my Android in sync with my iCloud *DAV services. This paired with BlueBubbles and OpenBubbles has made staying in the walled iMessage garden such a breeze. I can grab my iPhone or Android and everything just works.

I do wonder what apps people use for Contacts/Calendars though; recently I've been using the Fossify apps for a Samsung and Google free experience, but always keen to explore better options if they exist.

Still waiting for a good option for iCloud Drive access on Android, but the website works in a pinch.