Every custom app comes with a whole set of analytics to gain valuable insight into the way your app is being used.
Launches will tell you how many times the app has been started on a device over a set period of time.
Please note that this does not include when the app is already running in the background (see "Sessions" on the "Interactions page").
The little icons in the top left of the graph displaying daily launches let you change the way the data is displayed. You can choose the default graph as you can see on the image, or show a line chart, bar chart, or table.
With the pin icon you can add the graph to your personalized dashboard.