Amazfit Helio Strap 2: What We Know for H2 2026

Zepp Health's CFO confirmed a second-generation Helio Strap is coming in the second half of 2026. That's the headline. The hardware details are almost nonexistent right now, which makes this part product preview, part ecosystem analysis. Given that Zepp posted 33.8% revenue growth in Q1 2026 while the share price still dropped 19% in five days, the company is clearly in a phase where execution matters more than announcements.

What the Original Helio Strap Actually Did

The first Helio Strap was a chest-worn optical PPG sensor, which put it in different territory from a standard HRM strap. Traditional chest straps like the Garmin HRM-Pro Plus or Polar H10 read electrical impulses from the heart muscle directly, giving you ECG-grade accuracy on raw beat-to-beat intervals. The Helio Strap instead used light-based blood volume pulse detection on the sternum, adding SpO2 via optical sensors and skin temperature. The accuracy trade-off compared to a Polar H10 was real, particularly at high intensities above 170 bpm. Zepp positioned it as a recovery and all-day wear device as much as a workout tool.

The strap connected to Zepp OS devices and fed data into the Zepp app's readiness and recovery scoring. That ecosystem lock-in is worth flagging. If you weren't already on an Amazfit watch, the Helio Strap's data was harder to leverage. Whoop faces the same criticism but built a closed loop that athletes actually adopted at scale. Zepp hasn't cracked that yet.

What to Expect from the Helio Strap 2

Hardware speculation is thin because Zepp hasn't released specs. Based on the trajectory of Zepp OS 6 and what Amazfit added to the [Cheetah 2 Ultra](/en/articles/amazfit-cheetah-2-ultra-review-gps-hr-and-smo2-tested-2026-06-08), the likely upgrades include improved optical PPG sampling rates, better motion compensation algorithms for running and cycling, and potentially SmO2 (muscle oxygen saturation) monitoring. The Cheetah 2 Ultra already ships with SmO2 on the wrist, so a chest-positioned optical array doing the same would actually be more accurate given the proximity to major muscle groups. That would be a legitimate differentiator versus Whoop 5.0, which still doesn't offer SmO2.

Battery life on the original was acceptable for multi-day wear but not exceptional. A chest strap you have to charge every three days creates friction for triathletes or Hyrox athletes using it across training blocks. Coros's approach with the POD 2 running dynamics sensor offers months of battery life because it does less compute onboard. Zepp will need to decide how much processing happens on the strap versus the phone.

The connectivity picture also matters. The original relied on Bluetooth to Zepp devices. If the Helio Strap 2 adds ANT+ support, it opens up compatibility with Garmin head units, Wahoo computers, and third-party platforms. That single decision would dramatically change the product's appeal for cyclists and triathletes who already have established device ecosystems. [Zepp OS 6's multi-device sync improvements](/en/articles/zepp-os-6-amazfit-multi-device-sync-and-ios-notifications-explained-2026-06-18) suggest Zepp is thinking about interoperability, but ANT+ hardware is a separate commitment.

The Ecosystem and Financial Context

The Q1 2026 numbers deserve attention here. Revenue growth of 33.8% is genuinely strong for a wearables company not named Apple or Garmin. Margins improved. Losses narrowed. Wall Street still sold the stock hard, and the reason is straightforward: Zepp hasn't demonstrated a clear path to profitability, and the Helio Strap is a niche product in a segment dominated by Whoop's subscription revenue model. Zepp earns on hardware. Whoop earns on memberships. The recurring revenue gap is the bear case.

For athletes this is worth tracking. A company under financial pressure sometimes cuts corners on sensor calibration, algorithm development, or software support cycles. The [Amazfit Balance 3 improvements over Balance 2](/en/articles/amazfit-balance-3-vs-balance-2-what-actually-changed-in-2026-2026-06-18) show Zepp can iterate meaningfully. Whether that pace continues under margin pressure is the open question.

What's genuinely missing from the Helio Strap 2 announcement is any mention of third-party data export, open API access, or integration with platforms like Training Peaks or intervals.icu. Whoop has a developer API. Polar's Sensor Fusion SDK is available to developers. If Zepp keeps Helio Strap 2 data inside the Zepp app only, serious endurance athletes will pass. The hardware could be excellent. Closed data is a dealbreaker for anyone using a coach or structured training software.

The Amazfit Helio Strap 2 is worth watching if you're already in the Zepp ecosystem and want chest-worn optical data without switching to a Polar H10 or Garmin HRM-Pro Plus for ECG-based accuracy. At whatever price Zepp sets, it will likely undercut Whoop's total cost of ownership over 12 months. But if you train with a Garmin Fenix 8 or a Wahoo bike computer and need ANT+ compatibility, wait for confirmed specs before committing. The H2 2026 window gives Zepp roughly six months to answer the ecosystem questions that matter more than the sensor upgrades.