There really are quite a few apps due to the recent popularity, many are new and/or still in development. So pointing you towards an app that has that feature is tricky. Here is a list of what I'm aware on Android. I would suggest finding a few you like the look of, and then asking for such a feature?
Thanks, it's already more intuitive coming from relay. The interactions are quite similar and I can colapse comments just by tapping it or get out of pictures by swiping them wich Connect does not. I already feel more at home. Just need the hide previously viewed/interacted posts button.
Another former Relay user here. I am using mostly WefWef on my phone. It's not perfect, in many ways but it feels pretty good all around. If that's not working or something else is going on I typically look at Jerboa, Connect, Thunder, then Summit. In that order. I just don't know what to do otherwise.
There is nothing to really fill the gap left by Relay, not yet, but I'm finding WefWef to have most of the features that I am looking for and to be the most stable and usable.
If you don’t find an app you like there are some PWAs out there that are good. Like http://vger.app (formerly known as wefwef.app) that’s really nice and gets a lot of updates. Its interface does look a bit like iPhone but he is working on a layout for android devices.
I tried pretty much all of the Android clients / webapps. Connect is currently the one that is the most like Relay (favorite lists, community tab, general UI) but still missing key components. As a former Relay user, I feel you.