After the death of Google+, I joined a Diaspora pod that was created specifically for Google+ refugees. Now that pod is about the die (it still exist, but the owner died, so we're not sure how long it will last), so everybody is joining other federated social networks. Many moved to another Diaspora pod, some moved to Mastodon. I moved to Friendica, which has the advantage of being able to follow people on both Diaspora and Mastodon.

I haven't found a good Android app for it yet, unfortunately.