Curious Polls - Answer a question once a day for the chance to win £100/$100
Apple App Analytics - Apple's very own iTunes Connect App Analytics
Polls for iMessage - Group Decisions Made Easy. Create polls, vote, and view the results directly in iMessage. The easiest way to make any group decision.
My Motiff - Allowing you to stay connected in realtime
minipoll - Create simple shareable polls in seconds
Usage Analytics in appFigures - Track usage for your app along side downloads, ranks & more