You can benefit from your App also by enabling promotional banners that will allow you to monetize from your Application.
You can do that by subscribing to a service provider of advertising banners like AdMob.
These services will show ad banners on your App screen that will generate revenues once your users click on them.
Each banner may generate variable profit.
AppsBuilder's tech team developed an adv server able to pick the most profitable adv banners choosing among the major mobile adv networks, hence you can be sure you couldn't get more from your app!
You can access the Monetize section for your App by clicking on the Settings tab on your dashboard:
And then Monetize from the left hand side Menu: