Amazfit is pushing a significant new software update, version 3.3.10.3, to its Helio Strap wearable. This release follows closely on the heels of the version 3.3.6.1 update, which recently introduced a Tennis workout mode and an enhanced heart rate zone chart within the Zepp workout interface. The latest firmware is primarily focused on improving data connectivity and optimizing core performance metrics for the device.
Heart Rate Variability (HRV) Syncs with Apple Health

One of the most notable features of this 3.64 MB update is the integration of Heart Rate Variability (HRV) data synchronization with the Apple Health application. This critical change is a game-changer for iPhone users, allowing them to consolidate their HRV measurements alongside other health statistics gathered from various connected devices. Furthermore, this opens up the possibility of utilizing numerous third-party analytics tools that leverage Apple Health data for deeper insights.
However, the rollout of this specific feature appears to be inconsistent. While some users on platforms like Reddit have successfully enabled HRV data writing in the Apple Health app, others have reported that the option is currently unavailable to them. Amazfit has not yet provided official clarification on this partial accessibility. Details regarding the frequency at which the HRV data will sync between the strap and Apple Health also remain unspecified.
Enhanced Heart Rate Tracking and Stability
Beyond the improved data syncing, the update addresses the Helio Strap’s core functionality. Amazfit has declared that the heart rate algorithm has been refined and optimized. This optimization aims to enhance the stability and reliability of the heart rate tracking feature, providing users with more consistent and accurate readings throughout their activities.
In addition to the performance improvements, the final note in the change log confirms the deployment of general bug fixes. While the specific issues that have been patched are not detailed in the release notes, these corrections contribute to a smoother and more dependable user experience overall.
Phased Global Deployment Details
The deployment of software version 3.3.10.3 to the Amazfit Helio Strap is being executed in phases. Typically, these rollouts prioritize key markets such as the US, Canada, and China before becoming available in other regions, including Europe. Once the update reaches a user’s country, they will be able to initiate the installation process directly through the Zepp app on their connected smartphone.
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