RV Thermostat that can be Operated by Iphone App

My Honeywell can run dual compressors but it obviously has no idea what dual zone is since it's only one stat, meaning you can't independently control your 'zones'.

There simply isn't enough market to build something RV specific. You're better off figuring out what might be able to adapt. You'll also need to supply whatever you use with 24vac in order to keep it alive. That's going to be another engineering project for dry camping, especially making AC if the stat can't take DC