Better resources usage when running all the apps as Flatpaks. Once you hit the close button, the zygote is killed, and you’re sure that web browser doesn’t run anything stupid in the background anymore.

It just means it isn’t built using technologies native to Android, but it will run on every Android phone. I can’t speak of the performance of the newest releases, I use an iPhone now. YMMV.

https://super-productivity.com/

It’s all Electron though, so the Android widget sucks (won’t update way too often). But otherwise should be a perfect fit for you.