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Price and Release Date |
| Suggested Price | $399 | $799 | $149 | $324 | $199 | $255 | $150 | $330 |
| Release / Update | 2024 | 2023 | 2020 | 2020 | 2019 | 2018 | 2022 | 2018 |
Activity & Fitness |
| Calories | | | | | | | | |
| Distance | | | | | | | | |
| Heart | Third-generation optical heart sensor | Third-generation optical heart sensor | | | | | | |
| VO2max (Oxygen) | | | | | | | | |
| Sleep | | | | | | | | |
| Steps | | | | | | | | |
| Stress mgt | | | | | | | | |
| Female health | | | | | | | | |
| Skin temp | | | | | | | | |
| Breath rate | | | | | | | | |
Battery |
| Duration | Up to 18 hours normal use | Up to 36 hours normal use, Up to 72 hours in Low Power Mode | 7 days | 6 Days | 5 days | 24 hours | 2 days | 7 days |
| Rechargeable | | | | | | | | |
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Compatibility Support |
| Android | | | | | | | | |
| iOS | | | | | | | | |
| Windows Phone | | | | | | | | |
| Mac | | | | | | | | |
| Windows | | | Not yet | | | | | |
Connectivity Support |
| Bluetooth | | | | | | | | |
| Cellular | | | | | | | | Coming +$ |
| GPS | | | | | | | | |
| NFC | | | Fitbit Pay | | | | | |
| Wi-Fi | | | | | | | | |
Display |
| Color | | | | | | | | |
| Resolution | 42mm: 374 x 446 pixels; 46mm: 416 x 496 pixels | 502 x 410 pixels | 66x18 | 360 x 360 | 300 x 300 | 454 x 454 | 240 x 240 pixels | 360 x 360 |
| Size | 42mm or 46mm | 49mm | .721 inches | 1.58 inches | 1.34 inches | 1.4 inches | 1.3 inches | 1.2" or 1.3" |
| Touch | | | | | | | | |
| Type | Always-On Retina LTPO OLED | Always-On Retina LTPO OLED | OLED | AMOLED | AMOLED | AMOLED | | AMOLED |
Functions |
| Audio Speaker | | | | | | | | |
| Clock | | | | | | | | |
| Phone | | | | | | | | |
| Vibration | | | | | | | | |
| Voice | | | | | | | | |
Hardware |
| Accelerometer | | | | | | | | |
| Barometer or Altimeter | | | | | | | | |
| Ultraviolet Sensor | | | | | | | | |
| Water Resistance | Water resistant up to 50 meters | Water resistance 100m, Dust resistance IP6X, EN13319 recreational scuba diving to 40m, Tested to MIL-STD 810H | 5 ATM | 5 ATM | 5 ATM | IP67 | 5 ATM (50 Meters) | 5 ATM |
Notifications |
| Phone | | | | | | | | |
| Emails | | | | | | | | |
| Texts | | | | | | | | |
Software |
| Operating System | watchOS 11 | WatchOS 10 | Fitbit OS | Fitbit OS | Built-in | Wear OS | Built-in | Tizen OS |
| Apps | | | | | | | | |
| Music | | | Spotify control | | | | | Spotify |
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