I switched my front lawn to Flex Daily and have a Toro moisture senor that Rachio recommended. I let the Flex daily start it's primary watering. I then left the moisture sensor in the lawn at the recommended location per Toro for a few days and when it read 100% I set the moisture level for my Front Yard Zone on Rachio to Full.
After about 2 weeks I am noticing that the Toro moisture sensor and the Rachio Moisture level for my Front Yard Zone are off by 20 to 50% depending on the day. The Toro unit is showing much less moisture. The lawn appears to be ok but I am just trying to determine the cause of the difference.