Simple Poll - The easiest way to create polls in Slack
SurveyMonkey Intelligence - Usage and download metrics for all mobile apps
Twitter Polls - Polls embedded in tweets
Apple App Analytics - Apple's very own iTunes Connect App Analytics
Polls for WhatsApp - Create & share quick polls in your WhatsApp groups
CleverTap - CleverTap offers blazing fast analytics, powerful real-time segmentation, multi-channel messaging, A/B testing and personalization in one unified solution.