Garmin HRM-Pro Plus vs Whoop Mg

By Billy G. · Founder & Lead EditorVerified Jun 4 by Billy G.

Garmin HRM-Pro Plus
Garmin HRM-Pro Plus
Whoop Mg
Whoop Mg

Verdict: Whoop Mg wins on modern medical features and smaller size but Garmin HRM-Pro Plus provides stronger value and ANT+ compatibility for athletes. Garmin transmits real-time data via ANT+ and Bluetooth with swim storage (per Garmin specs) while Whoop Mg adds ECG and blood pressure (per 2025-05-08 release notes). The 3-year release gap favors Whoop for health insights but Garmin leads for dedicated runners.

Winner: Whoop Mg

Garmin HRM-Pro Plus: 7.5/10

Whoop Mg: 8/10

Spec-by-spec comparison

Garmin HRM-Pro PlusWhoop Mg
Battery LifeUp to 1 year14+ days
Release Date2022-072025-05-08
Price (USD)130—
ConnectivityANT+ and Bluetooth with swim data storageMedical-grade ECG and blood pressure monitoring

Garmin HRM-Pro Plus

What works

  • Up to 1 year battery life (per Garmin specs)
  • Tool-free battery door for easy changes
  • Stores and forwards heart rate data during swims or out of range

What doesn't

  • Released 2022-07 so older hardware than 2025 competitors
  • No ECG or blood pressure monitoring

Whoop Mg

What works

  • 14+ day battery life
  • 7% smaller than WHOOP 4.0
  • Medical-grade ECG and blood pressure insights

What doesn't

  • Requires subscription for full features

Bottom line

Our pick: Whoop Mg.

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