https://play.google.com/store/apps/details?id=io.github.hidroh.materialistic
I suppose the idea is the entry point - Instagram's entry point is viewing content, not creating content (the feed is the first thing that shows up when opening the app). Threads is the same as SNAP in that the first entrypoint is to create content: it opens the camera.
It'll be interesting to see if this can succeed in finally pushing SNAP out, as one benefit for users is leveraging the existing social graph from Instagram, whereas you must add people for SNAP.