Testimonial.to - Collect video testimonials in the simplest way
SurveyMonkey Intelligence - Usage and download metrics for all mobile apps
Trust - Trust lets you easily create online surveys, collect customer video testimonials and reviews, then display them with beautiful widgets on your business websites.
Apple App Analytics - Apple's very own iTunes Connect App Analytics
Endorsal - Fully automated collection & display of testimonials. Increase conversions with beautiful, simple social proof.
CleverTap - CleverTap offers blazing fast analytics, powerful real-time segmentation, multi-channel messaging, A/B testing and personalization in one unified solution.