I would like to know what Adobe program would be best suited to the creation of a colouring-in app.
The app needs to enable:
- selection of illustrations to colour in with a palette
- printing illustrations as PDF once complete
- ability to draw with others using the same app
I have never created an app before, however my experience is in illustration, graphic design and user experience.
I am not sure if any app from Adobe can help you achieve what you are trying to do. You will need to custom code your application and publish it. I suggest posting your question on a site like Stack Overflow.
Just to be sure, Adobe XD is a prototyping tool. You cannot create an app using Adobe XD.