Fitbit Charge 6 vs Fitbit Air
Both are good picks with different strengths. The Fitbit Charge 6 has an EDA stress sensor, while the Fitbit Air is lighter and is slimmer.
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Key differences
-
Battery life
Evenly matched
Similar battery life: up to 7 days and 7 days.
-
Health
Evenly matched
Much the same health sensors.
-
Weight
Fitbit Air wins
The Fitbit Air is lighter: 5.2 g against 30 g.
Other differences
- Stress sensor Fitbit Charge 6 wins
The Fitbit Charge 6 adds an EDA sensor that reads skin response to measure stress.
Which one should you choose?
Choose the Fitbit Charge 6 if…
- You want to track stress: it has an EDA sensor.
- You want heart-rhythm checks: it can record an ECG.
- You want to pay from your wrist: it has contactless payments.
Choose the Fitbit Air if…
- You wear it to bed or have small wrists: it weighs 5.2 g.
- You want it to slide under a sleeve: it's 8.3 mm thick.
Full spec comparison
The Fitbit Air leads on size and durability; elsewhere the two are closely matched.
Green cells with a ✓ mark the better spec in that row. Tick "Show differences only" to hide the rows where they match.
Overview
| Spec | Fitbit Charge 6 | Fitbit Air |
|---|---|---|
| Brand | ||
| Series | Charge | Fitbit |
| Versions | — | Special Edition Stephen Curry, Special Edition Pokémon Sleep |
| Colours | Coral/Champagne Gold Aluminum | Obsidian, Berry, Lavender, Fog, Rye, Sleepy Blue |
Platform & apps
Both work with the same phones and software.
| Spec | Fitbit Charge 6 | Fitbit Air |
|---|---|---|
| Operating system | — | Fitbit OS |
| Works with | iPhone and Android | iPhone and Android |
| Minimum iOS | iOS 16.4 | iOS 16.4 |
| Minimum Android | Android 11 | Android 11 |
| Software support | — | 2 years |
| Subscription | Optional | — |
| Subscription name | Google Health Premium | — |
| Subscription features | Daily Readiness Score, Stress Management Score, in-app coaching built with Gemini | — |
Display
The screens are closely matched.
| Spec | Fitbit Charge 6 | Fitbit Air |
|---|---|---|
| Display type | AMOLED | — |
| Screen size | 1.04 in | — |
| Colour display | Yes | — |
| Always-on display | Yes | — |
| Touchscreen | Yes | — |
| Controls | touchscreen, buttons | — |
Design & durability
The Fitbit Air is ahead on size and durability.
It is lighter and is slimmer, and the Fitbit Charge 6 doesn't beat it on anything here.
| Spec | Fitbit Charge 6 | Fitbit Air |
|---|---|---|
| Case shape | Band | Band |
| Dimensions | 36.73 x 23.09 x 11.2 mm | 34.9 x 17 x 8.3 mm |
| Thickness | 11.2 mm | 8.3 mm |
| Weight (case) | 30 g | 5.2 g |
| Weight with band | — | 12 g |
| Case material | Aluminum | Recycled polycarbonate and PBT plastics |
| Lens | Corning Gorilla Glass 3 | — |
| Band material | silicone | Textile with stainless steel buckle |
| Fits wrists | 130-211 mm | 130-210 mm |
| Water resistance | 5 ATM | 5 ATM |
| IP rating | IP68 | — |
| Water standard | ISO 22810:2010 | — |
| Operating temperature | -10 to 45 °C | — |
| Max altitude | 8,534 m | — |
Battery
Battery life is close on both.
How you use the screen, GPS and notifications will matter more than the difference between them.
| Spec | Fitbit Charge 6 | Fitbit Air |
|---|---|---|
| Battery (smartwatch mode) | 7 days | 7 days |
| All battery modes | Smartwatch: 7 days | Battery saver: 7 days |
| Battery type | Lithium-polymer | Lithium-polymer |
| Charging | proprietary-plug | USB-C |
| Full charge time | 120 min | 90 min |
| Fast charging | — | 1 day of battery life in 5 min |
GPS & navigation
Both handle location the same way.
| Spec | Fitbit Charge 6 | Fitbit Air |
|---|---|---|
| GPS | Built-in | — |
| Satellite systems | GPS, GLONASS | — |
| Navigation features | turn-by-turn | — |
Health & sensors
The Fitbit Charge 6 is ahead on health tracking.
It has an EDA stress sensor, and the Fitbit Air doesn't beat it on anything here.
| Spec | Fitbit Charge 6 | Fitbit Air |
|---|---|---|
| Sensors | optical HR, ECG electrode, SpO2, skin temperature, EDA | optical HR, accelerometer, gyroscope, SpO2, skin temperature |
| Heart-rate tracking | 24/7 | 24/7 |
| ECG | Yes | — |
| Irregular rhythm alerts | Yes | — |
| High/low heart-rate alerts | Yes | — |
| Blood oxygen (SpO2) | Yes | Yes |
| Skin temperature | Yes | Yes |
| Respiration rate | Yes | — |
| Sleep tracking | Sleep score | — |
| Stress tracking | Yes | — |
| Readiness score | Daily Readiness Score | — |
| Cycle tracking | Yes | — |
Training
Training features are evenly matched.
| Spec | Fitbit Charge 6 | Fitbit Air |
|---|---|---|
| Sport profiles | 40 | — |
| Auto activity detection | Yes | — |
| Training metrics | VO2 max, training load | — |
| Adaptive coaching | Yes | — |
| Heart-rate broadcast | Yes | — |
| External sensors | Bluetooth Heart Rate Profile exercise machines | — |
Smart features
Both offer much the same smart features.
| Spec | Fitbit Charge 6 | Fitbit Air |
|---|---|---|
| Notifications | Yes | — |
| Contactless payments | Yes | — |
| Payment service | Google Wallet | — |
| Offline music apps | YouTube Music | — |
| Bluetooth | Bluetooth 5.0 | Bluetooth 5.0 |
| Find my phone | Yes | — |