I have read numerous reviews all over the Internet wherein users complain they cannot get their phones to sync with this scale. Using Bluetooth, the scale connected to my phone within seconds and has remained connected for over a week. When I stand on the scale, my phone registers my weight within two seconds allowing me to save the value in the Fitbit app. I am using an iPhone 14. I have no idea why anyone would have any difficulty with this scale. I find the performance rock solid and very consistent. My guess is the people who are having trouble getting their phone connected to this scale have problems getting any Bluetooth item to connect to their phone. Or maybe they just don't know how to use their phone. Nonetheless, if you have a Fitbit and want to track your weight on a daily basis, this item will do that perfectly.