APP Name Gloryfit, Model KW66, Type: IPS, Battery Capacity: 340mAh, Charging Type: Magnetic charging, Resolution: 240*240pixels, Size: 1.28inch, Standby Time: About 30 days, Waterproof IP68, Compatible OS Android 5.1 or above IOS 9.0 or above, Bluetooth Version BT 5.0, Operating Mode Full Touch, Using time: About 15 days, Charging Time: About 2 hours.
Basically copy coupon, view price history or create e-mail price alert. Let’s see what best price is ATM.
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($19.99): BGefd92c
2. ($32.99): BG3849a7
3. ($42.49): BG51f436
you should apply the coupon in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGKW66, 7d18f7, BGHALLOWEEN, BGGRKW66, BGKW6635, BGB5KW66, band10, BGGRIMI66, BGWRIBAND10, BG520be5, BG29bdbd, BG97d738, BG5e91ed
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Here is price history (for all/most countries) for IMILAB KW66 Watch. The lowest price was: $19.99.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).