Frequently Asked Questions

Check most frequently asked questions here, if you still need help then please contact us at


Due to actual situation, some delays can take place. We apologize. Thanks for your patience.

You can track your order here: Track my Order

Please note that shipping timelines are from the the date of shipment not the order date. Generally orders are shipped out between 1 - 3 business days.

 7-15 days:

  • US
  • AU
  • NZ
  • UK
  • CA


Read full Shipping Policy here: Shipping Policy


Download or update the DaFit app here:

Apple App Store ➡

Google Play Store ➡

The SMT4 works on any Android with 5.0+ version and iOS with 9.0+

Date and time will be automatically updated once the SMT4 was paired with the app through Bluetooth

Please remember to remove the protector film from laser sensor.

Read our full setup page here: Setup page


Press and hold your finger on your current clock face to open the Clocks app. Move right or left to see the options.


Within the app you have many clock faces to choose from

  1. Open the SMT4 app on your smartphone and tap the device icon.
  2. Tap "Watch Faces"
  3. Choose a clock face and tap. Automatically will update on SMT4

Change SMT4 clock face

For measuring blood pressure, smartwatches use the optical heart rate sensor.

It detects the time it takes for a pulse to travel from the heart to the wrist. It is also known as Pulse Transit Time (PTT), based on which it shows the blood pressure readings. If the blood pressure is high, the pulse transit time is faster and if the blood pressure is low, the pulse transit time is slow.

Measuring blood pressure is much harder than tracking heart rate and rhythm, and getting it right is arguably even more important. 

Squeeze-free methods
Having more ways to easily take blood pressure measurements at home could be a big benefit to people with hypertension (high blood pressure) or other concerns. Pressure measurements taken exclusively in a doctor’s office are often unreliable: some people have higher blood pressure in-office because they’re anxious about the visit, while other people have masked hypertension — high blood pressure at home, but normal blood pressure at the doctor. 

What is the correct way to measure blood pressure?
 Use this checklist:

  • Don’t eat or drink anything 30 minutes before you take your blood pressure.
  • Empty your bladder before your reading.
  • Sit in a comfortable chair with your back supported for at least 5 minutes before your reading.
  • Put both feet flat on the ground and keep your legs uncrossed.
  • Rest your arm with the cuff on a table at chest height.
  • Make sure the Smartwatch is snug but not too tight. The watch should be against your bare skin, not over clothing.
  • Do not talk while your blood pressure is being measured.

In one position it repels, in the other it attracts the magnetic charger.


You can replace with any of our Original Watch Bands: SMT4 WatchBands.

You can also use any standard 22mm / 0.86" third party band.

SMT4 WatchBnads