I was very surprised to see Android lacking support for CalDav out-of-the-box. Seemed like an obvious feature for a calendar app, yet no provider. So while it m

I was very surprised to see Android lacking support for CalDav out-of-the-box. Seemed like an obvious feature for a calendar app, yet no provider. So while it might not be much; there are CardDav/CalDav-adapters on f-droid.org, they are free software and work very good in my experience. It integrates so it allows you to use the stock calendar app. In the end, though, I think the idea with phones like these is that they work "best" if you use the services that the manufacturer supplies, be it Apple or Google. If you use Gmail, Google Drive, Google everything, it's got a lot to offer.