Hi, I'm a Nerd - I'd love to try it out smartwatches, which are not too expensive, but still offer everyday usability and functionality. This time I'm testing T12 (also called T12 Pro) with a large 1.81-inch screen and Bluetooth calling features. Below is my review.
Technical specifications
Screen: 1.81″ TFT full-touch, resolution approximately 240 × 286 px
Processor and connectivity: GR5515 + AC6963A chipset with Bluetooth 5.1 (BLE)
Battery: 230 mAh with magnetic charger, charging in ~2.5 h, battery lasts 4–7 days of regular use or up to 20 days on standby
Water resistance: IP67 certified (water resistant to a depth of 1 m for the first time)
Compatibility: works with Android 4.4+ and iOS 8.0+ via the Da Fit app
Sensors: heart rate, blood pressure, blood oxygen (SpO₂) measurement, sleep and exercise monitoring
Bluetooth calls: wireless answering and calling with the watch, phonebook and call log synchronization
Additional features: AI voice assistant, weather, alarm, remote camera, remote music control, customizable watchfaces
My user experience
Screen
The screen is not ultra-capable (TFT, 240 × 286 px), but sharp enough for notifications and basic applications. Usable even in the sun, although with reflection in stronger light.
Calling and connectivity
Bluetooth calling works solidly – you can receive or make calls via watchThe sound is clear, but for more functionality you also need a Bluetooth phone nearby.
Health measurements
Heart rate, SpO₂, and blood pressure measurements worked accurately enough – ideal for health guidance, not medical diagnostics.
Battery usage
The battery charges quickly (2.5 watch) and lasts for several days. Magnetic charging is convenient, but requires precise alignment.
Sports modes
Supports up to 14 sports modes - from walking, running, cycling to group activities (basketball, football, etc.). Measures steps, calories burned and distance.
Advantages
Large 1.81″ screen, which is not standard on the cheapest models
Bluetooth calling with watch – phonebook and call synchronization
Health monitoring (heart rate, SpO₂, sleep)
Long operating time: up to several days without recharging
Waterproof IP67 – suitable for everyday use
Disadvantages and limitations
Screen it's not AMOLED, colors are a bit pale
Bluetooth calling only works with a nearby phone
Robustness: made of plastic and zinc alloy, not as robust as premium watch
Sensor accuracy: only approximate, suitable for trend measurements, not for medical purposes
Evaluation by criteria
| Category | Rating (★‑★5) | Comment |
|---|---|---|
| User screen | ★★★★☆ | Larger image, but slightly lower resolution |
| Calling function | ★★★★☆ | You call directly from watch, and needs a phone |
| Health measurements | ★★★★☆ | Useful for monitoring, not diagnostics |
| Battery autonomy | ★★★★★ | Good days of use on a single charge |
| Price / functionality | ★★★★☆ | Low price, lots of features for every day |
Overall rating: about 4.1 / 5 ⭐
Who do I recommend the T12 watch to?
Yes, I recommend it for:
- users who want a basic smartwatch with Bluetooth calling and health monitoring,
- those with fewer display requirements but want long battery life,
- suitable as the first watch for children or the elderly.
I do not recommend for:
- demanding users who expect high screen resolution, AMOLED, GPS or more robust materials,
- those who need precise measurements for medical use.
Purchase smartwatches at Piflar: T12
All smartwatches at the Nerd shop.
