I’ve seen the app Apollo as the center of the reddit protest (it was mentioned and cited more than any other app in relevant posts). I’ve also seen many Lemmy clients in development taking inspiration from it.
As a lifetime Android user I’ve never been able to use it, and I’ve never gotten a proper answer to “why not just use the official app?” What made it different from the official application and other unofficial clients that consequently made it so popular among Redditors?
It wasn’t anything super hard to understand. It just worked well and eliminated a lot of crap while focusing in on the most core parts of the experience. It was also a very pure iOS design, conforming to the iOS app guidelines that help it match the UI expectations of iPhone users. Apple’s design guidelines are stronger and better adhered to so there really isn’t a good analogue for Android, where different manufacturers all do different things.