Ecomhunt - Ecomhunt allows you to easily find products that are already proven to sell or how we like to call them Winning products! - in only a few clicks - it's time to stop guessing, start selling!
Sensor Tower - Sensor Tower is a platform for app store optimization and app industry intelligence.
AliInsider - Find Most Profitable Dropshipping Products in a Click! Analyze Competition, Check Saturation of Any Product, Find Top Suppliers & Target Markets.
App Annie - App Annie is a marketing analytics tool available for apps of all kinds. With App Annie, you can track sales, traffic, and a variety of other factors pertinent to monitoring an app's trajectory.
Pexda - Data-Driven Product Research that Creates First-Mover Advantages
appfigures - Cross-platform app store analytics for all of your mobile apps.