Fitness Tracker Accuracy Test: We Compared Top Models Side by Side

Why Accuracy Matters

Inaccurate fitness data leads to misguided training decisions. We put popular trackers through rigorous testing to find the most reliable options.

Testing Methodology

We compared heart rate readings against chest strap monitors, step counts against manual tallies, and GPS routes against certified measurements.

Heart Rate Accuracy

Fitbit Charge 6 and Garmin models showed highest accuracy during steady-state cardio. All optical sensors struggled slightly during high-intensity intervals.

Step Counting

Most devices overcounted by 5-15%. Fitbit and Apple Watch were closest to actual counts in our tests.

GPS Performance

Built-in GPS varies significantly. Premium models track within 1-2% of actual distance, while budget options may deviate 5-10%.

Bottom Line

For casual fitness tracking, any major brand works well. Serious athletes should invest in premium models with proven accuracy.