First #catsofmastodon with Tusks - exactly the app I said I needed to write. It already exists :-)
Trying it on Mac right now but that's exactly what I want to have on my iPhone: just my timeline, just posting. No distractions. Then I can waste time at night when I decide to or on the computer but not on my bedside.
Thx @bardi !
Edit: Link to app site: https://thirdculture.app/tusks