To be able to change permissions of an app you need to be an App Manager for this app or Account Administrator for your account.
First open up the properties for your app:
To set the permissions for various users, check or uncheck the checkbox representing a permission next to their email.
To save the permissions click on the Save button.
Information about permissions:
App Manager
Has full access to the app and may edit permissions for the app (also automatically given all other permissions for the app)
App Developer
May use Aquro App Studio to edit the App.
Access Cloud Data
May view and edit the data stored in the Aquro Cloud for this app.
Send push notifications
May send push notifications for this app.
Preview App
Have access to use the Aquro Preview App to preview the app.
Analytics
May access analytics data for this app.