These phones are considered vintage by Apple. iOS 15, which arrived in September 2021, supports all iPhones from iPhone 6s onwards, just as with iOS 14 and iOS 13. Both iOS 14 and 13 are ...
You can pair your Fitbit with your iPhone if the latter runs iOS 15 or later. This means that if you own an iPhone 6S series or newer, using a Fitbit will be possible. If you have a phone not ...