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.

Google Analytics - Improve your website to increase conversions, improve the user experience, and make more money using Google Analytics. Measure, understand and quantify engagement on your site with customized and in-depth reports.

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

SimilarWeb - SimilarWeb.com is a website analysis tool that gives you analytics information for any website.

AppStor.io - Free useful tools and services for App Store developers / marketing managers and owners.

Countly - Product Analytics and Innovation. Build better customer journeys.