Sourceful - A search engine for publicly-sourced Google docs

Sensor Tower - Sensor Tower is a platform for app store optimization and app industry intelligence.

Topic Research by SEMrush - Content ideas that resonate with your audience

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.

SummarizeBot - A blockchain-powered bot that summarizes information for you

appfigures - Cross-platform app store analytics for all of your mobile apps.