About Us

About Qubittime

OEM Smartwatch Solutions by GREENWELL LIMITED COMPANY

At Qubittime, a brand of GREENWELL LIMITED COMPANY (Business ID 0110080008), we research and supply affordable OEM smartwatches tailored for the Vietnamese market. Every model is rigorously inspected to deliver dependable performance and a seamless user experience.

Our mission is to make wearable technology accessible—helping you monitor health, stay connected, and live efficiently. We are headquartered on Floor 6, V11-B09 An Hung New Urban Area, La Khe Ward, Ha Dong District, Hanoi City, Vietnam, serving customers nationwide through qubittime.net.

Smart & Effortless Experience

Affordable, Trusted, Always Connected

Every Qubittime device is assembled to international standards and tested through multiple checkpoints before shipping. We provide transparent warranties and responsive support via email [email protected] or hotline +84 825 802 498.

Whether you’re in the gym, at work, or on the move, the Qubittime smartwatch offers fashion-forward design, precise sensors, and up to seven-day battery life. Start living smarter today!

How It Works

A Smarter Experience in 3 Steps

Order

Choose your favorite model on qubittime.net and complete secure checkout in minutes.

Receive & Connect

Enjoy fast nationwide delivery, then scan the QR code in the box to install the app and pair via Bluetooth instantly.

Live Smart

Track fitness, get notifications, customize watch faces, and enjoy lifelong support from the Qubittime team.

Frequently Asked Questions
and Trouble Shooting

Fail to start the watch

Maybe the battery level is too low. Please charge the battery timely

The blueteeth is not connected or cannot be connected

  1. The blueteeth is not connected or cannot be connected
  2. Please restart the mobile phone blueteeth and connect again
  3. Do not connect your mobile phone to other blueteeth device at the same time 

The measurement of heart rate/blood oxygen is inaccurate

  1. General, it is caused by poor contact between the watch sensor and human body
  2. Please ensure that the sensor contacts the wrist well during measurement
  3. Please keep your body still and the watch attached to your wrist tightly during measurement

Sleep data is not accurate enough

  1. Sleep monitoring simulates the status of natural sleep and getting up of human, and you should wear it as usual
  2. If you sleep too late or you do not wear the watch until you go to sleep, there may be some error
  3. It does not monitor the sleep data during daytime. The default time for sleep monitoring is from 9:30 in the evening to 12:00 at noon on the next day

For more frequently asked questions, please view
[My>FAQ] on the App