UMIDIGI Uwatch2 Smart Watch (Banggood, Aliexpress: Charging Type: Magnetic charging, Charging Time: About 3 hours, Resolution: 240*240pixels, Size: 1.33inch, Standby Time: About 25 days, Battery Capacity: 180mAh, Type: OLED (updated by supporting multi-touch function), Using time: About 5 days (the best price with coupon)).
You can create price alert here, copy coupons and view price history. What is best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in Hong Kong. One coupon is available. Cool!
Link: Banggood product page
1. ($38.02): BG51f436
you should apply the coupon in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGuwatch2, band10, BGpb1112, AFfbG10, BGBFAFF2019, BGUWATCH29, BGUwatch32, BGband10, BGAFF10OFF, BGUW2, BGCuponation10, BGWRIBAND10, 6GSGIT
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Price history and price alert
Check out price history chart (for all/most countries) for UMIDIGI Uwatch2 Smart 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)).