Amazfit April update: Active 3 Premium and Balance 2 get feature catch-up

Amazfit has released April firmware updates for two of its most prominent watches. The Active 3 Premium update delivers a general quality-of-life refresh. The Balance 2 update extends the BioCharge recovery framework with new logging and alert tools. Both seem to sit within a coordinated programme that has been progressively spreading the same core features across the entire Amazfit range for several months.

What Active 3 Premium owners get

Navigation improves on three fronts. All minor. Routing to a destination is clearer, off-course alerts fire sooner when you drift from the line, and the map itself shows more terrain detail with sharper contour lines. Hikers and trail runners travelling and navigating at slower speeds will likely benefit most.

Podcasts and local music now play in more countries, with the previous regional restrictions lifted. (Minor, unless you live there).

Sleep tracking has been retuned for more accurate stage and wake detection. This is the key update that warrants some more testing. I have been testing what I assume to be the same algorithm on the Helio Strap, where the Deep Sleep detection is certainly now in the plausible range, and overall sleep time perhaps a tad on the high side.

Owners of Apple devices who share an unhealthy interest in HRV (like me) will welcome a useful addition: heart rate variability (HRV) data now writes directly to Apple Health, so recovery and readiness can be tracked alongside standard Apple (Vitals) features, plus read by other apps.

What Balance 2 owners get

The headline addition is BioCharge Life Log. Owners can manually log events that affect recovery and energy through the day, including stress, alcohol, travel, and illness. Context like this helps explain a dip in the BioCharge score that might otherwise look unexplained. A new self-check tool flags unusual physiological patterns, and alerts have been refined. The underlying algorithm has been tuned, and a set of bug fixes is included. For background on the watch itself, see our Amazfit Balance 2 review.

Is this new for Amazfit, or just for these watches?

Both updates extend features that already exist elsewhere in the Amazfit range. BioCharge has been on the Balance 2 since September 2025 and rolled out to the Helio Strap, Active 2, and Bip 6 in the months after, as tracked in our December 2025 Amazfit software update roundup. Lactate threshold tracking, now spreading across the range, debuted with the Active 3 Premium at launch. Offline route planning and map auto-rerouting reached the T-Rex 3 and T-Rex 3 Pro in March.

So. What April shows is a brand running a coordinated monthly cadence, extending the same set of features across the lineup rather than reserving them for a single flagship. This pattern ties in with Zepp Health’s 2026 roadmap, which explicitly prioritises pushing features such as BioCharge and Zepp Coach deeper into the portfolio.

What it means for owners

Owners of either watch can trigger the update through the Zepp app. Rollouts are phased, so give it a day or so. Owners of other recent Amazfit watches can expect the same pattern: features that appear first on one model tend to arrive on the others within a few weeks. Amazfit has also extended its software support window for several recent watches, which means these feature rollouts are expected to continue for longer than originally promised at launch.

FAQ

What is included in the Amazfit Active 3 Premium April 2026 software update

The Active 3 Premium April 2026 update adds clearer destination routing, faster off-course alerts, more detailed landscape maps with improved contour lines, expanded podcast and local music playback in more countries, a refined sleep algorithm, and HRV sync to Apple Health. Notification wording and general system stability have also been improved.

What is included in the Amazfit Balance 2 April 2026 software update

The Balance 2 firmware version 3.46.0.1 adds the BioCharge Life Log for manually recording events that affect recovery such as stress, alcohol, travel and illness. It also adds a self-check feature that flags unusual physiological trends, refines alerts, tunes the underlying algorithm, and fixes a range of bugs.

What is BioCharge on Amazfit watches

BioCharge is Amazfit’s recovery and energy metric, comparable in concept to Garmin’s Body Battery. It combines heart rate variability, stress, activity intensity, and sleep quality into a single percentage that represents how much energy is available for the day. BioCharge replaced the earlier Readiness score across the range from September 2025 onwards.

What is BioCharge Life Log

BioCharge Life Log is a manual logging feature introduced on the Balance 2 in April 2026. Owners can record events such as stress, alcohol intake, travel, and illness. These entries provide context that helps explain changes in the BioCharge score, which would otherwise appear without cause.

Does the Amazfit Active 3 Premium send HRV data to Apple Health

Yes. The April 2026 update enables the Active 3 Premium to write HRV data directly into Apple Health via the Zepp app. Recovery and readiness data can then be viewed alongside other metrics in the Apple Health platform.

Is lactate threshold tracking exclusive to the Active 3 Premium

Lactate threshold detection first launched with the Active 3 Premium and has since rolled out to the T-Rex 3 Pro (31 March 2026), Balance 2 (31 March 2026), and Active Max (6 April 2026). More Amazfit models are expected to receive the feature.

Which Amazfit watches support BioCharge

As of April 2026, BioCharge is available on the Balance 2, Helio Strap, T-Rex 3, T-Rex 3 Pro, T-Rex Ultra 2, Active 2, Active 3 Premium, Active Max, and Bip 6. Amazfit has stated an intention to extend the feature across the current range.

How do I install the April 2026 Amazfit update

Open the Zepp app, go to Profile, select your watch, and tap System Update. Updates roll out in phases by region, so owners outside the first wave may wait several days or weeks to see the notification.

Does this update improve GPS or heart rate accuracy

This update focuses on sleep detection for the Active 3 Premium and broader algorithm tuning for the Balance 2. GPS and optical heart rate accuracy fall outside the stated scope of either release.

Will the same features come to older Amazfit watches

Amazfit has been extending features such as BioCharge and lactate threshold tracking across its recent lineup, including older models still within their support window. The company has also extended software support for several devices, which increases the likelihood that older watches continue to receive feature-level rather than purely maintenance updates.

Last Updated on 22 April 2026 by the5krunner

the5krunner

tfk is the founder and author of the5krunner, an independent endurance sports technology publication. With 20 years of hands-on testing of GPS watches and wearables, and competing in triathlons at an international age-group level, tfk provides in-depth expert analysis of fitness technology for serious athletes and endurance sport competitors. ID