Zepp 10: HybridCharge, Training Focus, and HYROX tools land for Amazfit
Amazfit has updated the Zepp app, the confusingly named app for all the company’s watches. The update replaces the existing BioCharge and Readiness scores with a new metric called HybridCharge, and adds Training Focus, a HYROX Training Library, and HYROX Race Analysis. Some significant updates.
HybridCharge is a 0-100 daily energy score that differs from its predecessor by incorporating subjective self-reported feelings and events alongside the more concrete biometric readings from the watch. The subjective measurements are logged daily across eight categories, including sleep quality, physical state, mood, cognitive load, nutrition, and environment, via a new system called LifeLoad. Each is scored individually as low, medium, or high on a perceived impact scale. Those subjective inputs combine with measured (inferred) sensor data on sleep quality, HRV, resting heart rate, and activity to produce three values throughout the day:
- a Wake score calculated each morning,
- an All-Day score tracking intraday changes, and
- an Evening score reflecting remaining reserve capacity.
A full explanation of how the score is calculated, and how it compares to Garmin Body Battery and Whoop Recovery, is available here (to follow).
Training Focus is also new. Based on the balance of recorded activity types over the preceding seven days, it recommends whether the next session should lean toward strength or endurance to restore your overall training balance to what it considers an optimal level.
The HYROX additions may be the most strategically significant element of the update. Amazfit is the only wearable brand to hold an official HYROX partnership, a position formalised through a three-year global agreement between Zepp Health and HYROX. No other wearable manufacturer currently offers the same officially licensed integration. The HYROX Training Library provides structured workouts balanced against your fitness level and race goals. HYROX Race Analysis allows you to review completed race performance, identify strengths and weaknesses, and plan for future events. Further HYROX-specific features are expected to follow as the partnership develops.
Zepp 10.4 is rolling out now on iOS and Android. Depending on the device model and firmware, the watch face may continue to display the score as BioCharge; the Zepp app always shows the current HybridCharge figure after sync. Updates to the watch face are expected this month or next to align the messaging across the ecosystem.
Note: this feature might be a bit buggy, and it might be worth holding off on updating for a week or so. As you can see from the screenshot above, there is no exertion recorded for me. I’m pretty sure I’m exhausted right now!
For the full Amazfit range, accuracy data and Zepp Health analysis: Amazfit sports watch guide.
Last Updated on 3 October 2026 by tfk the5krunner
Small things I always use
- Garmin 90-degree charging adapter: Charges your Garmin from any USB-C cable. Essential when travelling. I use one.
- Body Glide: The blue anti-chafe stick swimmers and runners carry. I use it.
- Speedo earplugs: Fewer ear infections and no cold-water dizziness. I use them.
- Dryrobe Advance: My winter changing robe for open-water swims. I use one. A cheaper option is the AONYIYI changing robe.
- Maurten: Race fuel that stays easy on the stomach. I use them.
- Garmin charging puck: The quickest way to top up before a session. I use one.
- Injinji: Toe socks that stop rubbing, so you run more. I use them.
- Ultimate toe protectors: Stop black toenails on long runs. They work. I use them.
- Compressport R2 v2 calf sleeves: My calf sleeves of choice. I use them.
- Cellucor C4: My pre-workout before hard sessions.
- TPU tubes: Schwalbe Aerothan, Tubolito and Pirelli SmarTube. Light, tiny spares. I use all three.
- G8 insoles: Adjustable insoles that are good. I use them.
- Cycplus Cube: A 97g electric pump that gets a road tyre rideable in two minutes. I carry one. 5% off with code THE5KRUNNER.
Watches and sensors
- Polar H10: My daily driver for waking HRV.
- Polar Verity Sense: My backup arm-worn HR sensor.
- Nomad bedside charger: Charges my iPhone and Apple Watch overnight. I use it, and many of their bands.
- Train.Red: The best muscle oxygen sensor I’ve used.
- Tymewear: Accurate heart rate and reliable ventilatory zones. I use it to pace endurance rides over an hour.
- Garmin Forerunner 970: A pro-grade triathlon watch. I use this.
- Apple Watch Ultra 4: My daily smartwatch. No phone needed on rides.
- Garmin Fenix 9 Pro: I’ve just bought one.
On the bike
- Continental GP5000 for everyday riding, and Aero 111 on the front for special occasions.
- Helmets: Specialized S-Works Evade 3 for road riding, and Rudy Project Wing for TT-style races. I use both.
- Ravemen FR300: A front light that mounts under your Garmin or Wahoo. I use one.
- Wahoo TRACKR Radar: I use it on one bike and Varia on the other. They perform the same.
- Garmin Varia RTL515: Radar that warns you of cars from behind. I use this model.
- Wahoo ELEMNT Roam 3: The bike computer that’s easy to use. I use mine on most rides.
- Favero Assioma Pro RS2: Accurate power pedals that swap easily between bikes. I use this model.
Home and indoor training
- NPE Runn: Makes my basic treadmill smart, sending more accurate speed and distance to my watch and Zwift. I use it.
- Google Wifi: Keeps Zwift connected in my pain cave. I use it.
- Apple TV 4K: Zwift on the big screen. I use two.
- Google Nest Doorbell (wired, 2nd gen): My video doorbell, running in both Google Home and Apple Home. I use it.
Health, recovery and sleep
- FreeStyle Libre 3 Plus: Shows how my blood sugar responds to diet.
- hDrop: Measures my sweat loss in summer and indoors.
- Fourth Frontier Zone: Checks my heart under load in hard sessions.
- Oura Ring 5: My partner’s recovery tracker of choice.
- Kineon MOVE+: Red light therapy for niggles. It works.
- Eight Sleep: A cooling mattress cover my partner and I use nightly.
Reader-Powered Content
This content is not sponsored. It’s mostly me behind the labour of love, which is this site, and I appreciate everyone who supports it.
Support the site: Follow (free, fewer ads) · Subscribe (paid, ad-free) · Buy Me A Coffee ❤️
Written by real people, with AI assistance. Fact-checked and verified for originality. See the Editorial Policy. FTC: Affiliate Disclosure — some links pay commission. As an Amazon Associate, I earn from qualifying purchases.
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
Thanks for the hint. Updated my Zepp app and the naming in the app has changed to HybridCharge (while it is still called BioCharge on my Cheetah 2 Ultra- I assume this will be changed with an upcoming software update).
i assume so too!
Here is something I don’t quite understand: after waking up, my Cheetah 2 Ultra displayed a BioCharge score of 84; however, after syncing with the Zepp app, the value was adjusted to 92. Does the app incorporate older data—data that is no longer stored on the watch itself—and then adjust the score accordingly during a sync? If so, this would imply that the readings might be somewhat inaccurate if you don’t have the Zepp app or your phone with you. Perhaps that was already the way before the Zepp App was updated to HybridCharge and I did not realize it until now?
I’m guessing here: the app contains subjective inputs that the wacth doesn’t know about. therefore the app is ‘correct’