In Apollo, there was this really interesting feature that let you disable the gestures for voting/replying/etc. If you did so, then you could use the entire screen to navigate between posts instead of needing to swipe all the way from the side.
I struggle with a repetitive stress injury and this feature helped me a lot! I managed to grab a screenshot of the exact setting before Apollo shut down. It would be awesome if something similar could be implemented in Memmy
Another feature Apollo had was the ability to use the tab navigation bar at the bottom for back / forward swipe gestures