Apple App Analytics - Apple's very own iTunes Connect App Analytics
Poltio - Create and share questions, get answers.
CleverTap - CleverTap offers blazing fast analytics, powerful real-time segmentation, multi-channel messaging, A/B testing and personalization in one unified solution.
Lumeos - Earn money for answering surveys, on the Blockchain
AppMetrica by Yandex - Free ad tracking & full-stack app analytics for mobile apps.
My Motiff - Allowing you to stay connected in realtime