Before you build an app, check that it can make money. AppSupa shows what apps in any niche earn, which keywords people search that are still easy to rank for, and whether the top app is easy to beat: rated low, not updated in ages, or with few rivals. Search your idea, see the numbers, then decide. Revenue and download estimates for 590K+ App Store and Google Play apps, keyword demand and difficulty, and what users complain about in the top apps' reviews.