I find myself checking out pretty often and just making myself feel bad about the state of the world, or killing half an hour on stupid games that I could 100% live without. This is probably pretty common, and I'm wondering what other people have found as a way to do more productive things with their phones in the downtime.
Read news, articles, watch science/politics/etc. videos, look at art on Instagram where I post some of my own. And that's it.
As people mentioned, looking at the camera's gallery. Plenty of pics of my cats over there.