We have downloaded some photos that we will use in the background on a tutorial to describe the functionality on a new app that we will release. Is that ok with the standard license?
Really depends on what the app does and if the images are the primary value of the app or not.
The app is a tool for families with small children.
We have 4 photos in the background in the tutorial where we explain the functionality. So it´s not the primary photos for the app. Just more to give examples of the user groups (parents/kids/families).
You can use the standard licenses as long as the content is not for sale or for commercial use.
Hope that helps!