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key specs | ||||
Water Resistant | Yes | Yes | ||
Compatible Devices | Android, iOS | Android, iOS Phones | ||
Battery Life (Days) | 8 | 20 | ||
Display Type | - | AMOLED | ||
Heart Rate Monitor | - | Yes | ||
general | ||||
Brand | Fitbit | Mi | ||
Model | Ace 3 | Smart Band 4 | ||
Release date | March 9, 2021 | - | ||
Color | Black/ Sport Red, Cosmic Blue/ Astro Green | Black | ||
Ideal For | Kids (Age 6+) | Unisex | ||
Material | Silicone | Thermoplastic | ||
Suitable For | Health, Lifestyle | Health, Lifestyle | ||
Touch Enabled | Yes | Yes | ||
Water Resistant | Yes | Yes | ||
Model Name | - | Band 4 | ||
Dial Shape | - | Rectangle | ||
display and battery features | ||||
Battery Life (Days) | 8 | 20 | ||
Battery Type | Lithium Polymer (Li-poly) | Lithium Ion (Li-ion) | ||
Charge Time (hours) | 2 | 2 | ||
Display Resolution | - | 120 x 240 RGB | ||
Display Type | - | AMOLED | ||
Battery Capacity (mAh) | - | 135 | ||
performance features | ||||
Shock Resistant | Yes | Yes | ||
Water-Resistant Depth (metres) | 50 | 50 | ||
connectivity features | ||||
Bluetooth Enabled | Yes | Yes | ||
Bluetooth Version | v4.2 | v5.0 | ||
Wi-Fi Enabled | - | No | ||
compatibility | ||||
Compatible Devices | Android, iOS | Android, iOS Phones | ||
activity tracking function | ||||
Alarms | Yes | - | ||
Do Not Disturb Mode | Yes | - | ||
Reminders | Yes | - | ||
Sedentary Reminder | Yes | - | ||
Sleep Tracking | Yes | Yes | ||
Step Counter | Yes | Yes | ||
Calories Burned | - | Yes | ||
Distance Covered | - | Yes | ||
Heart Rate Monitor | - | Yes | ||
Phone Notifications | - | Yes | ||
workout modes | ||||
Swimming | Yes | Yes | ||
Treadmill | - | Yes | ||
Exercise | - | Yes | ||
Outdoor Running | - | Yes | ||
Cycling | - | Yes | ||
Walking | - | Yes | ||
sensors | ||||
Accelerometer | Yes | Yes | ||
Pedometer | Yes | - | ||
Vibration Motor | Yes | - | ||
Gyroscope | - | Yes | ||
Optical Heart Rate Sensor | - | Yes | ||
dimensions | ||||
Width (mm) | 37.39 | 45.72 | ||
Height (mm) | 16.8 | 12.7 | ||
Depth (mm) | 12.9 | 17.78 | ||
Weight (grams) | - | 22.1 | ||
ratings | ||||
Overall NDTV Rating | - | Read Review | ||
Design and comfort Rating | - | |||
Tracking accuracy Rating | - | |||
Companion app Rating | - | |||
Battery life Rating | - |