Amazfit Helio Strap Pro
- Works with
- iPhone and Android
- Display
- none
- Case sizes
- 33.96 mm
- Battery
- 11 days
- Water resistance
- 5 ATM
- Weight
- 11.4 g
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Amazfit Helio Strap Pro at a glance
-
Battery
Around two weeks
Up to 11 days in smartwatch mode.
-
Display
No screen
Screen-free: you check everything in the phone app.
-
Health
Heart, sleep and more
Measures blood oxygen, skin temperature and HRV.
-
Phone & smart
iPhone and Android
Notifications from your phone.
-
Build
5 ATM water rating
11.4 g.
Amazfit Helio Strap Pro full specifications
Overview
| Brand | Amazfit |
|---|---|
| Model | Helio Strap Pro |
| Series | Helio |
| Replaces | Helio Strap |
| Colours | Mercury Gray, Black |
Platform & apps
Works with iPhone and Android phones.
No third-party app store: what it ships with is what you get. No subscription needed.
| Works with | iPhone and Android |
|---|---|
| Minimum iOS | iOS 17 |
| Minimum Android | Android 8 |
| App store | No |
| Subscription | Not needed |
Display
No screen at all: the band tracks in the background and the app shows your data.
| Display type | None |
|---|---|
| Colour display | No |
| Always-on display | No |
| Touchscreen | No |
Design & durability
A 33.96 mm case weighing 11.4 g.
Rated 5 ATM: fine for swimming laps and showers.
| Case sizes | 33.96 mm |
|---|---|
| Case shape | Band |
| Dimensions | 33.96 x 24.29 x 11.25 mm |
| Thickness | 11.25 mm |
| Weight (case) | 11.4 g |
| Case material | Plastic |
| Band material | Nylon |
| Band width | 22 mm |
| Fits wrists | 145-205 mm |
| Water resistance | 5 ATM |
| Water standard | ISO 22810:2010 |
Battery
Around two weeks: up to 11 days in smartwatch mode.
Real battery life depends on screen brightness, notifications and workouts.
| Battery (smartwatch mode) | 11 days |
|---|---|
| All battery modes | Smartwatch: 11 days |
| Battery capacity | 232 mAh |
| Charging | proprietary-plug |
| Full charge time | 120 min |
Health & sensors
Tracks heart rate around the clock, plus blood oxygen, skin temperature and HRV.
For sleep, it offers a nightly sleep score.
| Sensors | optical HR, accelerometer, gyroscope, skin temperature, thermometer, compass, SpO2 |
|---|---|
| Heart-rate sensor | BioTracker 6.0 |
| Heart-rate tracking | 24/7 |
| High/low heart-rate alerts | Yes |
| Heart-rate variability | Yes |
| Blood oxygen (SpO2) | Yes |
| Skin temperature | Yes |
| Sleep tracking | Sleep score |
| Stress tracking | Yes |
| Energy score | HybridCharge |
Training
Tracks 50+ sports and activities.
| Sport profiles | 50 |
|---|---|
| Swim tracking | Pool |
| Training metrics | training load |
| Heart-rate broadcast | Yes |
| External sensors | HR strap, power meter, speed/cadence |
Smart features
| Notifications | No |
|---|---|
| Message replies | None |
| Bluetooth | Bluetooth 5.2 |
Specs compiled from Amazfit's product pages and datasheets. Manufacturers revise hardware between versions, so check the version on the box. Spotted an error? Tell us.