Stats
In the past, it was impossible to get information about how your applications were being used. In fact, unless you wanted to wait 24 hours, you weren't even able to find out how many sales you did until the day was over. Usage statistics changes all of that.
With Heartbeat, you can see what's going on with your applications as it's happening. Usage statistics are displayed in a simple, yet informative view. They allow you to see how many times people are opening your application (and during what hours), and which of these are new users. By knowing which users are new, you can estimate how many potential sales you've racked up for any given day and even find out which parts of the day did better for you.
You can also find out how many users are using different firmwares, networks, versions and devices.