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The Polar Vantage M3 has premium guts in a mid-range package — with one key flaw

I tested the new Polar Vantage M3 against the Garmin Fenix 8's GPS and the HR accuracy of COROS and Polar heart rate monitors.

(Image credit: Michael Hicks / Android Central)I used the Fenix 8 as a location accuracy control group because Garmin's dual-band GPS tends to lead the industry for dependable results in my tests. (Image credit: Android Central)As for my track workout, I can only show a portion of the graph because it somehow got fully misaligned in-between lap pauses about halfway through, so the results were needlessly confusing. Its 7-day battery life is on the short side for a running watch, and I'm not the biggest fan of Polar Flow as a companion app, but it doesn't feel like a major downgrade from the pricier Vantage V3, with similar perks like its useful VO2 Max and orthostatic tests and comparable accuracy.

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