Tap and hold on pot/account icon, drag your finger to another pot/account icon, let go, enter amount, done. It was a really slick way of doing it.
Could work for payments between friends if they remedy this by overhauling the payments tab, so you can pay friends directly from pots too. I’ve either shared a video or a gif of it in action somewhere before, I’ll see if I can find it and edit this post to add it.
edit: There’s a gif in my post that started this thread:
Really miss the Jedi swipe gesture to hide the balance too. It was these little things that made me fall for N26.