The answer — one pick, priced
Get the
Garmin HRM 600
$85 under your budget
Garmin's flagship strap — the5krunner's most complete pick adds a rechargeable module, watch-free recording of 18+ sports, and the exclusive Step Speed Loss metric.
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Fit ledger — need → measured evidence
■ The catch — co-equal billing, always
It's a Garmin-only flagship. Step Speed Loss, running dynamics and Running Economy stay dark on Apple, Coros, Polar or app-only setups — so outside Garmin you pay over 50% more than the Polar H10 for what becomes a plain HR belt.
Dealbreaker? The Polar H10 gives brand-agnostic accuracy for $60 less ↓
■ Every product has a catch. Verdicts that hide it are how bad buys happen.
Runners-up — if your needs differ
Adjacent verdicts — same method
Traps — this verdict avoids
Swim data vanishes
Only 3 of these 9 straps record swim HR. Bluetooth carries no signal underwater, so unless a strap has onboard memory or store-and-forward — the Polar H10, Garmin HRM 600 and HRM-Pro Plus — the Wahoo TRACKR, Polar H9 and every budget strap lose the entire swim.
Garmin metrics need a Garmin watch
All six running-dynamics metrics stay dark without a Garmin watch. Cadence, ground contact time, vertical oscillation and Step Speed Loss never appear on Apple, Coros, Polar or app-only setups — so a $130-$165 Garmin strap becomes a plain HR belt.
One app at a time
Single-channel budget straps pair to just 1 Bluetooth app at a time. Only the TRACKR, HRM-Pro Plus, HRM 600 and Polar H10 hold 2-3 Bluetooth links at once — feed a watch and a phone together — while ANT+ broadcasts to unlimited receivers.
Provenance — 8 sources, dated
Winners are picked before affiliate payouts are checked, from the full research dossier at knowledgelib.io. Prices, stock and listings are re-verified monthly by an automated pipeline. Some links earn us a commission — it never changes the pick, and we say so here rather than in a footer you'd never read.