Parse.com makes it easy to collect data about when and how often my mobile app is opened. I can review graphs about my mobile app by logging into my Parse.com account.
Add Parse library to our Android project.
Add the line of code ParseAnalytics.trackAppOpened(getIntent()); to onCreate method in main Activity
Include ParseAnalytics in our main Activity header
Android Developer Guide | Parse. Retrieved June 8th 2013 from https://www.parse.com/docs/android_guide#analytics