It is almost identical to its predecessor, with the addition of a heart rate sensor on the bottom of the band, making it slightly bulkier at 37 x 13.6 x 9.9mm.

The addition of the heart rate sensor seemed to have decreased battery endurance, which claimed to be 30 days of use from one charge.

An app named "Zepp Life", by the manufacturer of the Xiaomi fitness tracking wrist band, is available on the Google Play Store.

[2] A later application called Mi Health was made available for Xiaomi phones running the MIUI user interface.

[3] Researchers from the University of Toronto found in 2016 that most fitness trackers, including the Xiaomi Mi Band and its app (version 1.6.122), were transmitting a range of personal data, including the email address of the user's contacts, geolocation, the phone's serial number, and information entered by the wearer regarding food intake, menstruation, pregnancy, etc.