Sunshine is amazing. I can vouch for it. It’s in active development and works really well.

Yeah, but I think after the original scare a lot of people want to be as independent and free from WotC as possible.

Since an update this morning it is working fine.

To add to mummelpuffins comment:

For 5e there is https://open5e.com/, although that is under the OGL.

But for B/X and other OSR-systems there are whole lot more, I think. Basic Fantasy RPG is with it’s 4th edition OGL-free:

http://www.basicfantasy.org/downloads.html

I am trying it now for the first time on Android. But everytime I want to go back with the back button of the navbar, the app quits. Is that intended behavior?