Howdy!
The app is on the same underlying system, so any tweaks like the ones today to address speed (or any issues) effect both one and the same.
The website that was redone in 2018 scales to fit phone screens in phone web browsers as if it were an app. By site stats tons of folks use it on Android and iOS devices. Of course always looking to improve, if anyone recommends a good app developer don’t hesitate to have them get in touch!