I'd like to be able to have a debug/testflight version of my app on my phone as well as the app currently in production, but I'm not sure how to do that. I know it has something to do with the bundle IDs and macros and things, but I'm not really sure where to start, partially because I'm not sure what questions to ask.
Any advice would be much appreciated!
The bundle IDs must be different or the system will overwrite one app with the other when you install it.
Set up separate targets. For each target, use a different bundle ID, and different icon art files (or a different asset catalog). That should be all there is to it.