When I open the app remote on my phone, it automatically connects to controller. It will stay connected until you get out of bluetooth range. I can walk 40+ feet out, and still be within range.
My cousin has same setup on his RV and when we camp besides each other I can connect our controllers and control both RVs with a single phone. I can control each controller independently, or group them together so both RVs match. It's pretty slick.
2011 Wildcat 32QBT
2006 GMC 2500, Airsafe 20K hitch, Air Lift Loadlifter 5000 air bags with Air Lift WirelessONE compressor
Jack of all trades, Master on none