Apple App Analytics - Apple's very own iTunes Connect App Analytics
AppMetrica by Yandex - Free ad tracking & full-stack app analytics for mobile apps.
Usage Analytics in appFigures - Track usage for your app along side downloads, ranks & more
Growth Tower App Analysis - Top 500 US iOS apps & ASO analysis
Poltio - Create and share questions, get answers.
Segment Sources - Load CRM, billing, and other cloud data to your Warehouse