You're also getting those SpO2 readings carried out by the same sensor that delivers the heart rate data. We tested it against a dedicated pulse oximeter and found that readings were identical. Amazfit and Fitbit both have strong smartwatch lineups and it's a tough call between the Fitbit Versa 4 and Amazfit GTS 4 (and rounded-faced GTR 4).

For activities like running, pool swimming, indoor rowing, core metrics are on the whole reliable. Both devices are better suited to 20-30 minute workout time as opposed to running or cycling for hours if you crave optimum accuracy. Amazfit also offers similar functionality during workouts and additional insights like VO2 Max inside of its companion smartphone app. You will also get a rich level of detail as far as your HR data and how it’s presented in the Amazfit app. There’s no support for external heart rate monitor chest straps on most Amazfit devices, though you can generally broadcast HR data to compatible devices and apps to open up the possibilities of what you can do.Typical usage scenario: Heart rate monitoring is always on and measures at 30-minute intervals, high-precision sleep and all-day stress monitoring are disabled; 100 pushed messages a day; receive 10 call notifications per day, vibrations last for 10 seconds each time; raise wrist to see device time 200 times; sync with the Zepp App once per day; test blood-oxygen 2 times per day; exercise data is recorded for 60 minutes per week. I think it's pretty cool device, but they should add the improvements and corrections I've suggested to the next iteration. Like older versions of the watch, you still get the body composition analysis feature, plus SPo2, ECG, and heart rate monitoring. But there is a new Personalized Heart Rate Zone feature for workouts, and we’ll see Samsung roll out the Irregular Heart Rhythm notification feature that detects signs of aFib. We’ve had mixed experiences with mirrored notifications. In general, you can decide which phone notifications you want pushed to your wrist, plus whether you want to preview their contents. You can’t reply to messages, but as one of the best smartwatches for Android and iOS, the GTS/GTR series lets you answer calls, no matter your connected smartphone. Still, the Apple Watch is better catered for iPhone users, while the Samsung Galaxy Watch 4 and all the best Samsung watches are better for Samsung phone users. The Mi Band 6 features a 125 mAh capacity battery just like the Mi Band 5 and that should get you up to 14 days in typical usage and 20 days in power saving mode . In our heavy usage testing, it was 7 days. If you turn off more power intensive features like continuous heart rate monitoring, you will get longer.

From an accuracy point of view, we think it's a bit of a mix-bag across both platforms. Fitbit's newest devices like the Charge 4, Versa 3, or Sense offer more reliable data based on our experience. But these devices have their moments of throwing up questionable data too.The way those features work are near identical based on using what appears to very similar software. Given Huami manufactures the Mi Band for Xiaomi, there's a lot of crossover in terms of design. And there's not been a huge effort to make the Mi Band 6 and the Amazfit Band 5 look all that different.

Only certain Garmin watches designed for multi-day GPS can last as long an Amazfit watch. Fitbit devices max out at one week, while Apple and Samsung last no more than two days. Should you buy an Amazfit watch? You can also connect it to Strava and Relive to soak up the Kudos and create videos of your outdoor adventures. For someone without breathing complications, a blood oxygen of 95%-100% is considered normal. Several times when I self-administered SpO2 readings with the Amazfit Band 5, it said my levels were 97% or 98%. At the same time, the Apple Watch 6 said my blood oxygen level was 100%. Based on my understanding of pulse oximetry, I’m inclined to believe the Apple Watch’s readings are more accurate, but the difference isn’t much. Amazfit Band 5 review: Notifications and Alexa From the band, you'll need to head to the Status screen to see step counts, distance covered, calorie burn and how many idle alerts you've raised during the day. Most watch faces will serve up daily stats as well.If that's something that appeals. then the Amazfit Band 5 will be the one for you. Other than that, you're getting similar features with the Mi Band 6 giving you a bigger display to make use of them.