Amazfit Helio Strap vs Google Fitbit Air
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At a glance
Key specifications and important differences. Full details follow below.
| Feature |  Amazfit Helio Strap |  Google Fitbit Air |
|---|---|---|
| Price | KSh 22,000.00 | KSh 21,500.00 |
| Battery capacity | 232 mAh rated | Lithium-polymer battery; capacity not published |
| Water resistance | 5 ATM; suitable for splashes, showering and shallow-water swimming, not diving or high-pressure water activities | Water-resistant to 50 m; dry the band after exposure to water |
| Health & wellness features | 24-hour heart rate, blood oxygen, stress, BioCharge energy level, PAI and heart-rate recovery; wellness measurements are not intended for medical diagnosis | Heart rate, SpO2, skin-temperature variation and fitness tracking; wellness data is not a medical diagnosis |
Full specifications
2 of 4 products
| Specification | Amazfit Helio Strap | Google Fitbit Air |
|---|---|---|
| Identity & design | ||
| Brand | Amazfit | — |
| Model | Helio Strap (A2445) | Fitbit Air |
| Dimensions | 33.97 × 24.3 × 10.59 mm (heart-rate sensor base excluded) | 34.9 × 17 × 8.3 mm without band |
| Weight | 20 g | 5.2 g without band; 12 g with band |
| Build materials | Fiber-reinforced polymer sensor body | Recycled polycarbonate and PBT plastic tracker housing |
| Wrist size | 145–205 mm | 130–210 mm textile; 130–175 mm small silicone or 165–210 mm large silicone |
| Strap / band | 22 mm nylon strap with hook-and-loop fastening | Textile and polyurethane band with stainless-steel buckle; silicone small and large bands are also supported. |
| Controls / buttons | Screen-free smart band with indicator lights; controls and data are managed through the Zepp app | Screenless tracker with vibration feedback and an LED status light; configuration and detailed results are managed in the Google Health app. |
| Connectivity | ||
| Bluetooth | Bluetooth 5.2 BLE | Bluetooth 5.0 BLE; syncing range up to 9 m; synchronization requires an internet connection and phone location permission. |
| Sensors, health & fitness | ||
| Sensors | BioTracker 6.0 PPG biometric sensor (5PD + 2LED), accelerometer, gyroscope and temperature sensor | Optical heart-rate sensor, red and infrared SpO2 sensors, and skin-temperature sensor |
| Health & wellness features | 24-hour heart rate, blood oxygen, stress, BioCharge energy level, PAI and heart-rate recovery; wellness measurements are not intended for medical diagnosis | Heart rate, SpO2, skin-temperature variation and fitness tracking; wellness data is not a medical diagnosis |
| Sleep tracking | Sleep stages including REM, naps, sleep schedule, sleep HRV, breathing quality and sleep score | Sleep duration and health insights through Google Health |
| Sports / workout modes | 50+ sports modes, including smart strength training and official HYROX Race mode | Automatic and app-started workout tracking |
| Training & outdoor features | — | Live heart-rate broadcast to compatible gym equipment, Cardio Load, Active Zone Minutes, phone-connected GPS and post-workout pace and heart-rate zones in Workout Intensity Map. |
| Battery & durability | ||
| Battery capacity | 232 mAh rated | Lithium-polymer battery; capacity not published |
| Battery life | Up to 10 days typical use | Up to 7 days |
| Charging | Magnetic charging head; less than 2 hours; USB-C cable is not included | USB-C charging cable |
| Water resistance | 5 ATM; suitable for splashes, showering and shallow-water swimming, not diving or high-pressure water activities | Water-resistant to 50 m; dry the band after exposure to water |
| Compatibility | ||
| Phone compatibility | Android 7.0 or later; iOS 15.0 or later | Google Account and Google Health app required; Android 11.0+ or iOS 16.4+ |
| Companion app | Zepp app; supports synchronization with Strava, TrainingPeaks, adidas Running, komoot, Relive, Google Fit and Apple Health where available | Google Health app |
| Colors | Black | Obsidian, Berry, Lavender or Fog; special editions vary |
| Additional specifications | ||
| Vibration motor | Rotor motor | Vibration motor |
| Charging time | Less than 2 hours from empty | 90 minutes; 5-minute quick charge provides up to 1 day |
| Smart recognition | Recognizes 25 strength-training movements | Automatically detects common activities |
| Offline data storage | Stores up to 21 days of offline heart-rate data | — |
| Real-time heart-rate broadcast | Supported; heart rate can be synchronized to compatible third-party smartwatches | — |
| Workout status | PeakBeats training-status system | — |
| Energy, load and readiness features | BioCharge energy-level tracking | Personalized insights available through Google Health and optional Google Health Premium |
| Other health features | PAI health assessment and heart-rate recovery | — |
| Third-party fitness apps | Strava, TrainingPeaks, adidas Running, Runna, komoot, Relive, Google Fit and Apple Health; availability varies by region and platform | — |
| Packing list | Smart band and strap assembled, magnetic charging head without cable, and instruction manual | Google Fitbit Air tracker, wristband and USB-C charging cable |
| Packaging materials | Made with 100% recyclable materials | — |
| Movement sensors | — | 3-axis accelerometer and gyroscope |
| Bluetooth and Wi-Fi | — | Bluetooth 5.0; Bluetooth LE sync up to 9 m |
| strap material | — | Textile performance band with stainless-steel buckle; silicone bands optional |
| temperature monitoring | — | Skin-temperature variation in the Google Health app |
| offline storage | — | 7 days of detailed minute-by-minute motion data and 30 days of daily totals |
| packaging materials | — | 100% plastic-free packaging |
| Positioning / GPS | — | Phone-connected GPS through the Google Health app; Fitbit Air does not have built-in GPS. |
| Health & wellness features | — | 24/7 heart rate, resting heart rate, heart-rate variability, breathing rate, blood oxygen (SpO2), skin-temperature variation, steps, distance, calories, Active Zone Minutes, Cardio Load and Readiness; Google Health also supports weight, nutrition, water, mood and cycle logging. |
| Sleep tracking | — | Sleep Score, sleep schedule, sleep duration and sleep stages; Smart Wake uses sleep movement and heart rate to wake during a lighter sleep stage; adaptive sleep coaching requires Google Health Premium. |
| Sports / workout modes | — | Automatic detection for walking, running, cycling, sports, elliptical, rowing machine and stationary bike; manual and app-started workout tracking is also supported. |
| Smart features / notifications | — | Vibration and LED battery/status alerts, optional phone notifications, Fast Pair on Android and multi-device support with a compatible Pixel Watch. |
| Charging | — | Magnetic USB-C charging cable; 0–100% in 90 minutes; a 5-minute quick charge provides up to one day of battery life. |
| Colors | — | Obsidian with Matte Black buckle; Berry with Polished Champagne Gold buckle; Lavender or Fog with Polished Silver buckle; Stephen Curry Rye/Pyrite and Pokémon Sleep Sleepy Blue special editions. |
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