The only downside about having GPS on the Charge is that it'll gobble up your battery a lot faster than on the Charge 3. Like the Charge 3, it's also hard to see the screen in direct sunlight. The only time the lag really bothered me was while I was running and wanted to quickly glance at my stats without taking my eyes off the road. The touchscreen isn't as responsive and it takes a few seconds to light up when you raise your arm to wake the screen, but I eventually got where I wanted to go.

Instead, you control the Charge 4 with a combination of the touchscreen and by pressing the left side of the tracker to navigate settings. , and it also does away with physical buttons. The screen can only display in black and white, but I like that it's nearly half the size of a traditional smartwatch, such as the , the new version doesn't look much different - it's just the tiniest bit bulkier on your wrist. The $150 Charge 4 (£130, AU$230) is a tracker I will happily wear 24/7 thanks to its sleek, understated design. There are plenty of great wearables for athletes, like the Garmin Forerunner 945 and Suunto 3, that have way more fitness chops than the Charge 4, but they're not the most fashionable. Only Android device owners, however, can send quick replies from the wearable device.Shorter battery life than the Fitbit Charge 3 Receiving text notifications from your phone is also possible. You cannot make phone calls from the Charge 4, but you will get call and calendar alerts on the device. When you get home, you can see a map of your route through the Fitbit app. This makes it possible for the device to keep track of your real-time pace and distance when you're out and about without your phone. With the functionality, you can navigate between playlists, songs, and albums. The Charge 4 can control Spotify music from your nearby phone. Because of this, you can wear the tracker in the shower and pool. Like previous Charge devices, the Fitbit Charge 4 is swim-proof with water resistance up to 50 meters. Is it waterproof? Can I wear it while swimming?

In turn, you can see an estimate of your oxygen level variability in your bloodstream, which may indicate variations in your breathing during sleep. With the built-in SpO2 sensor, the Charge 4 provides information that powers Fitbit's Estimated Oxygen Variation Graph in the Fitbit app. Product laydown photography for Fitbit Charge 4.

Charge 4 fitbit