I cannot see the point why external heart rate sensor cannot be used for activity tracking. The Polar Verity Sense optical heart rate monitor has a battery life of 20 h and is very comfortable to wear. For 24*7 activity tracking, you need to change it twice a day. But as a result you get data from a sensor which has ECG accuracy. Best heart monitor watches at a glance: Best heart monitor watches at a glance: Apple Watch Series 9 - £399, John Lewis. Best for heart rate tracking on a budget: Amazfit Bip U Pro - £59, Amazon Step count not working. This has happened a few times now and is really frustrating. Last week I did a 5 mile run and registered only 47 steps, today same 5 mile run 1500 steps (I obviously have a large stride). I've reset, connected via USB, checked activity tracking it still happens. In fact I reset an hour ago and registered a grand total The device may need a clear view of the sky to acquire satellite signals. Go outdoors to an open area. The front of the device should be oriented toward the sky. Wait while the device locates satellites. It may take 30–60 seconds to locate satellite signals. Improving GPS Satellite Reception. If you are using a heart rate monitor and it is not properly registering with the Vivoactive, try the following these steps: Put on the heart rate monitor, which activates the sensors in the device. (It will only transmit when you are wearing the device). Bring the device as close to the sensor as possible. Garmin vivoactive 4 GPS Smart Watch in Slate Stainless Steel Bezel with Black Case and Silicone Band (Renewed) 4.4 out of 5 stars. 507. 3 offers from $199.95. Climate Pledge Friendly. Products with trusted sustainability certification (s). Learn more. Select > > . The vívosmart 3 device starts broadcasting your heart rate data. NOTE: You can view only the heart rate monitoring screen while broadcasting heart rate data. Pair your vívosmart 3 device with your Garmin ANT‍+® compatible device. NOTE: The pairing instructions differ for each Garmin compatible device. See your owner's manual. In keeping with Garmin's sports tech legacy, the Garmin Vivoactive 3 has a heart rate sensor, The Garmin Vivoactive 3's screen measures 1.2 inches and has a 240 x 240 pixel display, which is a Activity Tracking. Tips for Erratic Heart Rate Data. My device does not display the correct time. Maximizing Battery Life. My device display is difficult to see outside. Restoring All Default Settings. Product Updates. Updating the Software Using Garmin Express. Updating the Software Using the Garmin Connect App. It was recording perfectly. I synched it with Garmin Express because I wanted to download new watch faces. The iPhone App did not work. When I try to view the data through the Garmin Express, same thing-no heart rate data. Overall, the Garmin VivoActive3 is a nice piece of hardware. The software side needs some work. 2lMwH.