InterestExplorer - Discover 1000's of hidden Facebook interests to target.
SurveyMonkey Intelligence - Usage and download metrics for all mobile apps
upRive - Create and scale Facebook ads quickly and efficiently
Apple App Analytics - Apple's very own iTunes Connect App Analytics
Facebook Ad Hunter - Facebook Ad Hunter uncovers hidden audiences to target when running Facebook Ads.
CleverTap - CleverTap offers blazing fast analytics, powerful real-time segmentation, multi-channel messaging, A/B testing and personalization in one unified solution.