APP Name Haylou Fun, Operating Mode Full-Touch, Bluetooth Version BT 5.1, Model LS12, Brand Haylou, Series RS4, Compatible OS Android 6.0 or above; iOS 11.0 or above.
Basically copy coupon, view price history or create e-mail price alert. What is best price?
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 Hong Kong. Hmmm… There is no active coupon in Banggood at this moment.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGHYRS4, BGc70579, BGHU1619, BG830d10, BGbf11dd, BGHOBBY26, BGJP67, BGe0f5e9, BG8a9bc9, BGed645b, BGd9a830, BG2b7721, BGb92c26, BG565144, JanBGCoupon8, BGSaleFeb8, BGSaleAD, BG284c49, BGMARCHSALE, BG9ac4a8, BG52d643, BGAUGUST8, BG217661, BGCAPITALOS8, BGCOUPERT8, BG8FORMULAMX, BGBFDAY8, BGNEWYEAR8
(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 Haylou RS4 LS12 Smart Watch. The lowest price was: $25.99.
Price records source(s): 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)).