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?
So I’ll be honest, I only every tried Apollo and the official Reddit app. The reason I stopped using the official Reddit app is partially because the interface, especially for videos, got significantly worse after an update a few years ago. The main reason though was because it managed to suck down 10 GB of my cell data in ONE DAY of not particularly heavy usage. This was despite having all the data friendly options on (no auto playing of videos, low data mode, etc.). After doing that a second time, I switched to Apollo and never looked back. Never had that problem again and a way better interface and experience all around. I honestly just can’t justify going back to the (Official) Reddit app knowing that it’s possible, if not likely that it will destroy my entire cell data plan for the month in a day of usage.