A competitor set is a decision, not a search result. The useful version starts with discovery across store search, similar-app relationships, and overlapping review language, then asks you to confirm which apps really compete and whether each is direct or adjacent.
History is what separates tracking from checking. A snapshot shows today's price and screenshots; a tracked history shows that the price changed twice this quarter and the subtitle was rewritten after a major release.
Competitor reviews are the overlooked half. Grouped into the same themes as your own, they show where a competitor is weak and which complaints are shared across the market.