Seren ('star' in Welsh) is an Android browser for the Gemini Protocol. There are a lot of text-based Gemini clients for desktop computers which are popular with technical people, Seren is designed for everyone else with ease of use and accessibility being the main design goals.
The Gemini Protocol is a few years old now and while it has grown considerably the content in ‘Geminispace’ is still mostly tech people talking about tech and unfortunately a lot of posts about Gemini itself. There is a lot of activity about other niche interests if you hunt around for it though, using search engines instead of feed aggregators.
Free alternatives to Seren are Deedum and Lagrange (available via F-Droid).