Wristband wearables have come a long way, and these days we expect them to offer GPS, heart rate monitoring, alarms and a range of handset connectivity features. The £129.99/$149.99 Fitbit Charge 4 has all of these, plus a mix of other features, some of which Fitbit calls 'apps'. You can choose to show or not show these wristband apps, which include a contactless payment wallet called Fitbit Pay, on the device by making selections in the Fitbit smartphone app (iOS or Android).
Fitbit Charge 4 on long-term test at ZDNet