Is it possible to select which camera to use in the app, i.e front and back ?
Currently, no, and we have no plans to, although features like this can always be requested through the normal channels: https://ideas.inductiveautomation.com/ignition-features-and-ideas
Hello, this functionality is highly requested by users. I will also go to the link you specified and add to ideas. Thanks!
This feature is in active development. Ill tag the ticket with this post so we can update it once its released.
Hope that helps!