Amazfit Helio Strap Update Adds Smartwatch Pairing, Better Sleep Tracking, and Expanded Pickleball Mode

Amazfit has pushed a new software update to the Helio Strap, the company's screenless fitness band that sells for $94 on Amazon. The strap last saw a substantial feature drop in December, and this patch builds on that work with three changes worth examining: tighter integration with Amazfit smartwatches, a reworked sleep tracking algorithm, and an expanded pickleball mode.

What's new

The headline addition is cross-device pairing. After the update, you can link the Helio Strap to a compatible Amazfit smartwatch so the band's heart rate data gets stored offline on the watch during a workout, even when there is no Bluetooth connection back to your phone. That matters most in the pool. Swimming has always been a weak spot for wrist-based optical sensors and for phone connectivity, since water blocks Bluetooth and the wrist flexes constantly during strokes. By letting the strap act as the primary sensor and caching its readings on the watch, Amazfit sidesteps both problems. The company says the Helio Strap's heart rate readings are more precise than the smartwatch's own sensor, so when both devices are recording, the strap's data takes priority.

The second change targets sleep. Amazfit says the updated algorithm produces more accurate sleep data, though the release notes stop short of detailing what changed under the hood. Sleep and recovery scoring is the core pitch for any band in this category, so algorithm tuning here goes straight to the device's main selling point.

Third, pickleball mode now collects more granular stats, including a count of forehand and backhand strokes. That follows the pattern Amazfit set in December, when it added basketball and pool swimming as tracked activities and introduced the ability to save favorite workouts to a list inside the companion app. The patch carries those December features forward in its notes alongside the genuinely new additions.

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How it compares

The Helio Strap exists to undercut Whoop. Whoop's 5.0 band requires an ongoing membership to function, which is the entire friction point Amazfit is targeting. At $94 with no subscription, the Helio Strap asks for one payment and then gets out of your way. That is a fundamentally different ownership model from Whoop, where the hardware is effectively bundled into a recurring fee and the device stops delivering insights if you stop paying.

Data quality is where a subscription-free rival usually loses ground, so the validation matters. According to an analysis by The Quantified Scientist, a reviewer known for rigorous sensor accuracy testing against ECG and chest-strap references, the Helio Strap delivers extremely reliable workout data. That independent check is the strongest argument in Amazfit's favor, because the whole proposition collapses if the heart rate numbers cannot be trusted. The new smartwatch pairing extends that reliability into swimming, the one scenario where a wrist strap and a phone both tend to fall short.

The trade-offs are the obvious ones for a screenless band. You give up an on-device display, so all your data lives in the phone app rather than on your wrist. The smartwatch caching feature only helps if you already own a compatible Amazfit watch, which narrows its audience. And while the expanded sport modes are useful, stroke counting in pickleball is the kind of feature that sounds better in a spec sheet than it tends to feel in daily use.

Who it's for

This update is aimed squarely at people who want continuous health and recovery tracking without a monthly bill, and who do not need a screen on their wrist. Swimmers stand to gain the most from this particular patch, since offline heart rate logging through a paired Amazfit watch solves a real measurement gap rather than padding the feature list. Existing Helio Strap owners get a free upgrade that makes a device they already own measurably more capable, which is the right way to treat a sub-$100 product.

If you are weighing the Helio Strap against a Whoop subscription, the math is straightforward. One purchase versus an open-ended recurring cost, backed by third-party data suggesting the cheaper option holds up on accuracy. For buyers who balk at paying every month to read their own heart rate, that combination is hard to argue with. Full details on the changes are available on the official Amazfit product page.