Voyager

You can also configure the gestures, so you can swipe posts away to hide them.

Sync

Sync is easily the best app IMO. If you didn't know it's a former reddit app that has years of development and a ton of features and settings. It's one of the best apps ever IMO, looks great and is a joy to use once you've figured out what settings fit your needs. I can write a list of settings that I use if you want?

Memmy does it

Summit, my favorite app, has it!

Avalon

Jerboa.

Eternity! I loved Infinity for Reddit, and this is a fork of that.

Sync for Lemmy has this feature

I haven't used it much, but Eternity has a "hide read posts" option.

Connect