Thank you very much. 

If you want another suggestion:

Auto focus the search input so a keyboard automatically opens on mobile. 

Rationale: most users use it to search for gifs and it removes the action of tapping on the input to type. The other actions on the app require a tap anyway so users wanting to do something else will not be inconvenienced, especially if you make the header buttons (upload etc) fixed to the top in mobile view.

Summary: saving clicks improves UX