Grid Diary - The simplest way to get started with keeping a diary
Apple App Analytics - Apple's very own iTunes Connect App Analytics
Stigma - A daily journal to be happier and more self-aware
My Motiff - Allowing you to stay connected in realtime
Fabric by Google - Real time alerts and analytics for apps powered by Crashlytics and Answers.
Usage Analytics in appFigures - Track usage for your app along side downloads, ranks & more