Wow interesting, it looks like Dexcom One isn't compatible with Follow. Sadly there's no quick (or free) option, but just in case you're interested it looks like the workarounds might be 1) buy an Anubis transmitter to use with your One sensors (which would let you use the Dexcom G6 app and your partner use the Follow app (assuming their particular Android is compatible), plus other benefits) or 2) use XDrip+ on your phone instead of the Dexcom app and build a Nightscout for your partner to see your numbers remotely. I know that was a ton of jargon! This group https://www.facebook.com/groups/cgminthecloud/?ref=share&mibextid=NSMWBT is a good place to learn more. Happy Dexcom using and best of luck!!