Garmin D2 Air X15 vs Fire-Boltt Ninja comparison
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| key specs |
| Strap Colour | Black | Black |
| Display Size | 35mm | 33mm |
| Compatible OS | Android and iOS | Android, iOS |
| Strap Material | Silicone | Silicone |
| Dial Shape | Round | Rectangle |
| Display Type | AMOLED | - |
| Ideal For | Unisex | Unisex |
| general |
| Brand | Garmin | Fire-Boltt |
| Model | D2 Air X15 | Ninja |
| Release date | October 22, 2025 | August 4, 2021 |
| Model Name | Garmin D2 Air X15 | Ninja touch to Wake SpO2 |
| Dial Shape | Round | Rectangle |
| Strap Colour | Black | Black |
| Strap Material | Silicone | Silicone |
| Size | Regular | Regular |
| Water Resistance Depth | 5 ATM | 1m |
| Usage | Fitness & Outdoor | - |
| Ideal For | Unisex | Unisex |
| Model Number | - | BSW007 |
| Touchscreen | - | Yes |
| Water Resistant | - | Yes |
| Dial Material | - | Metal |
| Dial Colour | - | Black |
| dimensions |
| Weight (g) | 38.00 | 80.00 |
| Width | - | 41 |
| Height | - | 34 |
| Thickness | - | 10 |
| Diameter | - | 33 |
| product details |
| Sensor | Heart Rate Monitor, Stress, Sleep, Pulse Ox blood oxygen | Accelerometer Sensor, Barometer Sensor, Gyro Sensor, Light Sensor, Optical Heart Rate Sensor, SpO2 Sensor, Blood Pressure Monitor |
| Compatible Device | Android and iOS | Android, iPhone |
| Notification | Call Notification, Smartphone Apps Notifications | Yes |
| Battery Life | 10 days | 5 days |
| Battery Type | - | Li-ion |
| Charge Time | - | 120 minutes |
| Stand By Time | - | 15 days |
| Rechargeable Battery | - | Yes |
| connectivity features |
| Call Function | Yes | No |
| Bluetooth | Yes | Bluetooth |
| Third Party App Support | Yes | Limited |
| Call Features | Make and Receive calls | - |
| Other Connectivity Features | GPS, Galileo, Glonass, Beidou, QZSS | - |
| Bluetooth Version | - | 5.0 |
| Messaging Support | - | Yes |
| Operating Range | - | 10m |
| platform and storage features |
| Compatible Operating System | Android and iOS | Android, iOS |
| RAM | 8GB | - |
| camera and display features |
| Display Resolution | 454 x 454 | 240x240 |
| Display Size | 35mm | 33mm |
| Display Type | AMOLED | - |
| Backlight Display | - | Yes |
| Scratch Resistant | - | Yes |
| fitness and watch functions |
| Step Count | Yes | Yes |
| Calorie Count | Yes | Yes |
| Heart Rate Monitor | Yes | Yes |
| Altimeter | Yes | - |
| Compass | Yes | - |
| Calendar | Yes | Yes |
| Alarm Clock | Yes | Yes |
| Date & Time Display | Yes | Yes |
| Language | English | English |
| Chronograph | - | No |
| Other Fitness Features | - | 7 sports modes |
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