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?
Once upon a time there wasn’t a good Reddit app for iOS with usability and accessibility like the rest of Apple’s ecosystem. Then comes along Alien Blue, which kicked ass. After a while, Reddit buys Alien Blue and ruins the UI. Apollo then clones Alien Blue and starts improving on it. Apollo quickly became the only way I would use Reddit on my phone. It was a better client than anything Reddit has come up with on their own - I’d wager their official app is unusable for many people.
Memmy is great alternative to Apollo for iOS.