Everyone has their own idea of what makes a smartwatch the best smartwatch, but we can all agree that improvements and upgrades play a big part. The Fitbit Sense and the Garmin Vivoactive 4 are two perfect examples of what makes a good upgrade. Both of these watches have greatly improved since their predecessors.
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https://www.androidcentral.com/fitbit-sense-vs-garmin-vivoactive-4