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Fitbit Charge 3
Key features:
- 24/7 heart rate
- Battery life up to 7 days (varies based on use and other factors)
- Auto exercise tracking
- Sleep tracking and insights
- Swimproof (water-resistant to 50M)
- Call, text and app notifications
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Fitbit Inspire 2
Key Features:
| Battery Life | Battery life of up to 10 days |
| IP Rating | Water resistant to 50 meters |
| Sensors | Optical heart rate monitor |
| Size | Dimensions: 1.47″ l x .66″ w x .5″ h; Small – Fits wrist 5.5″ – 7.1″ in circumference; Large – Fits wrist 7.1″ – 8.7″ in circumference |
| Storage | Saves 7 days of detailed motion data, minute by minute; Saves daily totals for past 30 days; Stores heart rate data at 1 second intervals during exercise tracking and at 5 second intervals all other times |
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Fitbit Sense
Key Features;
- 1.58″ AMOLED screen display
- Multi-path optical heart rate sensor
- Skin temperature sensor
- Ambient light sensor
- Built-in GPS + GLONASS
- PurePulse® 2.0
- Menstrual health tracking
- 20+ goal-based exercise modes
- 6+ days of normal usage
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Fitbit Versa 3
Key features:
- Run, bike, hike and more phone-free—and see your real-time pace & distance—with built-in GPS. Then check out your workout intensity map in the Fitbit app
- Active Zone Minutes uses your resting heart rate to gauge exercise effort and gives you a buzz when you step up the intensity so you can make the most of your workouts
- Better track heart rate 24/7 with PurePulse 2.0, Fitbit’s enhanced heart rate technology
- Use your voice with Amazon Alexa Built-in to check the weather, set reminders, control smart home appliances and more from your watch (Voice assistant availability and features may vary)
- Free 90-day Fitbit Premium trial for new Premium users