Is it possible for SW to make an app for mobile usage?

I use it on my mobile and it's fine just with the browser tab open.

See https://similarworlds.com/25-Similar-Worlds/785944-Will-you-be-happy-to-use-SW-on-a-mobile-browser-if for more info on current thinking of guy who owns the site

I wish I had a nickel for every time this question has been asked here.

This has been discussed