CGM features and fixes · Eversense 365

Eversense 365 warm-up: how long it takes

After a health care provider inserts the sensor, it has a 24-hour Warm-Up Phase. Then the Initialization Phase needs 4 fingerstick calibrations, and readings appear a few minutes after the 2nd calibration. (Eversense)

What the maker says to do

1. Wait 24 hours after the sensor is linked; you do not need to wear the transmitter during this time.
2. Turn on the smart transmitter and place it over the sensor with an adhesive patch.
3. Do the calibrations when the app asks.

More on the Eversense 365

• Follower app not updating
• Signal loss
• Sensor error
• Sensor failed early
• Alarms not sounding
• Follower not getting alerts
• Compatible phones

Warm-up on other CGMs

• Dexcom G6
• Dexcom G7
• Dexcom ONE+
• Dexcom Stelo
• FreeStyle Libre 2 and 2 Plus
• FreeStyle Libre 3 and 3 Plus
• Medtrum TouchCare Nano CGM
• Medtronic Simplera
• SIBIONICS GS1

Sources, quoted

• Eversense: “The Warm-Up Phase lasts for 24 hours after the sensor is linked.”
• Eversense: “During the Warm-Up Phase, you do not need to wear the smart transmitter.”
• Eversense: “Once the Warm-Up Phase is complete, turn ON the smart transmitter and place it over the sensor with the Eversense ® adhesive patch. The system will prompt you to calibrate using the app.”
• Eversense: “Glucose readings will start displaying in the app a few minutes after the 2nd calibration is successfully completed.”

Every quote is checked against its source page before each update of this site; last checked 2026-10-06. Makers change their apps; the source page is the authority when it differs.