Same here. Hasn’t been updated in 8 years; doesn’t really need to be updated.
Lets you reorder the list so that your most used stuff is on top and hide units that you’re not interested in.
The only thing that bugs me is that sometimes the last conversion hides behind the keyboard. If that’s one I need, I drag it up one and put something else at the bottom.
You can swipe left and right along the bottom (where the little bar is) to switch apps.