What Calendar and To Do solution do you recommend?
I would like to have a central Calendar that I could sync everything to it, from my email calendars and my to do list, is there something like that selfhosted or not, that is FOSS?
I'm also using Radicale and I've landed on the Calengoo app because it can do both events and tasks in the same app. It's amazingly customizable and it can sync directly if needed, bypassing the Android account system. If you buy it directly off the website you get a perpetual license that doesn't depend on Google Play.
I got so excited about an app that would do both, went to App Store and got genuinely startled by how unpleasant it looked. I don’t understand when devs opt in to spend more time on custom styling when there are lots of properly designed libraries
It's not good looking out of the box but you can customize it extensively. Give it a chance. I'm glad I put in the time, I ended with a calendar app that's more suitable to my taste than anything else I've used before.