We are constantly seeking ways to improve your experience with your tracker. From time to time we update the firmware (software) of the device to improve its performance. When a firmware update is available, a notification will appear in the App. Follow the instructions on the screen to perform the update.
At first use you will most certainly be invited to update the firmware. Accept this update to take advantage of the latest improvements to the product.
*credit to Sylvain of iHealth Labs EU
https://helpcenter.ihealthlabs.eu/hc/en-gb/articles/205909771-iHealth-AM3-Firmware-update