Does the G6 work with iwatch? Do you have to use your phone also?
Yes and yes. I have G5 and Ticwatch E. Watches run via bluetooth and wi-fi connections to phone. Make sure phone is ok for watch you are buying. Various watch es connect to both Apple and Android.
I have the Apple Watch and iPhone using Dexcom G6.
The dexcom only syncs to the Phone, the phone syncs to the watch. So the watch is only useful as a second more convent display for the dexcom. Still I use the watch for 95% of my readings.
I have the same set up. I spend a lot of time in meetings and find it more discreet to look at the CGM data on my watch rather than the phone.