You can call it a niche, we call it a cluster. Cluster is a group of apps sharing a unique idea (astronomy, emergency, driving a car, etc). Robolitica tracks 1000 clusters allocated within 40 segments.
Clusters help you to understand the market.
Indexes help to understand trends. Indexes indicate how popular and how profitable different clusters are.
Indexes help to understand trends.
Robolitica Map is the first thing you should check going international.
Map shows how different app niches perform around the globe.