Amazfit Firmware Update Adds FTMS Smart Trainer Support and On-Watch HYROX Analysis

For Amazfit’s latest firmware update to fundamentally change how its watches track indoor training, two external hardware conditions have to be met: the user must be wearing the company’s Helio Strap Pro for HYROX tracking, and their stationary bike or rower must broadcast the FTMS Bluetooth standard. With the rollout of firmware version 6.3.25.x this week, those connections are now fully live across the brand's premium smartwatch lineup.[1][2]

The update, which requires a modest 15.72-megabyte to 16.5-megabyte download depending on the device, is currently pushing to eight of the brand's current smartwatches, including the Active 3 Premium, the T-Rex 3 family, the Balance 3, and the Cheetah 2 Ultra. It marks a deliberate shift by Zepp Health, Amazfit's parent company, to position its devices not just as standalone trackers, but as central hubs that aggregate data from specialized external sensors and third-party gym equipment.[1][2][3]

The most significant addition for competitive athletes is the dedicated HYROX analysis. When an updated watch is paired with the Helio Strap Pro—a waist-mounted sensor designed specifically for the hybrid fitness race—the system stops treating HYROX as a generic cardio session. Instead, users can launch a race or simulation directly from their wrist, prompting the watch to record movement counts, movement frequency, and heart-rate trends for each specific station.[1][2]

After the session, the Zepp app translates that raw data into actionable insights, highlighting pace changes and offering training suggestions tailored to individual HYROX movements. Practically, this means athletes can identify exactly which station is spiking their heart rate disproportionately and adjust their pacing strategy accordingly. The update also streamlines the hardware friction: if a Helio Strap Pro is already registered to a user's Zepp Health account, the watch will now pair with it automatically.[2]

For indoor cyclists and rowers, the update activates support for the Fitness Machine Service (FTMS) Bluetooth protocol. This is the industry standard that allows smart trainers, spin bikes, and rowing machines—including the popular Concept2 RowErg—to transmit their internal metrics outward. Once connected, the Amazfit watch displays real-time power output, cadence, speed, and distance directly on the screen, pulling the numbers from the equipment rather than estimating them from wrist movement.[1][2][4]

This integration solves a common frustration for indoor training: fragmented data. By pulling the machine's exact metrics into the watch, the entire workout is logged in one place with accurate power and distance figures, rather than leaving the most critical numbers stranded on the gym equipment's console. The distance calibration screen has also been updated to allow users to toggle between metric and imperial units, a necessary fix for riders matching their watch to a specific bike's display.[2][4]

Beyond the major hardware integrations, the firmware includes several quality-of-life adjustments aimed at keeping athletes focused. A new "Athlete Defaults" setting allows users to automatically enable a "Workout Do Not Disturb" mode and disable non-essential sports alerts the moment a training session begins. The goal is to eliminate the need to manually silence notifications while setting up for a race or a heavy lift.[2]

Music management has also been offloaded from the watch interface to the Zepp Health smartphone app. Users can now organize playlists and manage locally stored tracks on their phone, ensuring that different background music can be assigned to different workouts without having to navigate menus on a 1.3-inch or 1.5-inch touchscreen.[1][2][5]

The watches' navigation tools received minor but practical refinements. The route elevation chart has been redesigned for better readability at a glance, and the "Advance Up" map view now automatically rotates to match the wearer's heading when zooming in. Additionally, the update introduces real-time wrong-way detection and route deviation warnings to keep runners and hikers on track.[1][2]

While none of the cited technical release notes or reviews included direct quotations from Zepp Health developers regarding the patch, the company described the firmware on the Chinese social media platform Weibo as its "September 2026 OTA Major Update." The phased rollout signals a clear trajectory for Amazfit: building a more interconnected, equipment-agnostic ecosystem for athletes who want precise data integration without being locked into a single manufacturer's hardware.[1][3][4]