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Price and Release Date |
| Suggested Price | $179 | $399 | $799 | $399 | $149 | $159 | $100 | $90 | $199.99 | $200 | $180 | $179.95 | $120 | $300 |
| Release / Update | 2019 | 2024 | 2023 | 2023 | 2019 | 2023 | 2020 | 2020 | 2017 | 2019 | 2019 | 2017 | 2015 | 2022 |
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 | 24 days | Up to 18 hours normal use | Up to 36 hours normal use, Up to 72 hours in Low Power Mode | 18 hrs | 6 Months | Up to 7 days | 10 Days | 1 year | 7 days | 1 day | 2 days | Up to 3 days | 8 days (without notifications) | 7 days |
| Rechargeable | | | | | | | | | | | | | | |
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Compatibility Support |
| Android | | | | | | | | | | | | | | |
| iOS | | | | | | | | | | | | | | |
| Windows Phone | | | | | | | | | | | | | | |
| Mac | | | | | | | | | | | | | n/a | |
| Windows | | | | | | | | | | | | | n/a | |
Connectivity Support |
| Bluetooth | | | | | | | | | | | | | | |
| Cellular | | | | | | | | | | | | | | |
| GPS | | | | | | | | | | | | | | |
| NFC | | | | | | | | | | | | | | |
| Wi-Fi | | | | | | | | | | | | | | |
Display |
| Color | | | | | | | | | | | | | | |
| Resolution | 454 x 454 | 42mm: 374 x 446 pixels; 46mm: 416 x 496 pixels | 502 x 410 pixels | 484x396 | | | 141 x 63 | 112x112 | 72 x 144 | 360 x 360 | 400 x 400 | 160 x 80 | | 240x240 |
| Size | 1.39 inches | 42mm or 46mm | 49mm | 41mm and 45mm | 0.4 inches | 1.04-inch AMOLED | 1.47 inches | 0.79 inches | | 1.2 inches | 1.39 inches | 1.18 inches | | 1.2 inches |
| Touch | | | | | | | | | | | | | | |
| Type | AMOLED | Always-On Retina LTPO OLED | Always-On Retina LTPO OLED | OLED | Analog | AMOLED | OLED | MIP | MIP | AMOLED | OLED | TFT LCD | LED | MIPS |
Functions |
| Audio Speaker | | | | | | | | | | | | | | |
| Clock | | | | | | | | | | | | | | |
| Phone | | | | | | | | | | | | | | |
| Vibration | | | | | | | | | | | | | | |
| Voice | | | | | | | | | | | | | | |
Hardware |
| Accelerometer | | | | | | | | | | | | | | |
| Barometer or Altimeter | | | | | | | | | | | | | | |
| Ultraviolet Sensor | | | | | | | | | | | | | | |
| Water Resistance | 5 ATM | 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 (50 Meters) | 3 ATM | Water-resistant up to 50m | 5 ATM | 5 ATM (50 Meters) | 5 ATM | IP68 | 5 ATM | WR30 | 2 ATM | 5 ATM (50 Meters) |
Notifications |
| Phone | | | | | | | | | | | | | | |
| Emails | | | | | | | | | | | | | | |
| Texts | | | | | | | | | | | | | | |
Software |
| Operating System | Built-in | watchOS 11 | WatchOS 10 | WatchOS 10 | | Fitbit OS | Fitbit OS | | | Wear OS | Wear OS | | n/a | Built-in |
| Apps | | | | | | | | | | | | | | |
| Music | | | | | | | | | | | | | | |
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