Basically copy coupon, view price history or create e-mail price alert. Let’s see what best price is ATM.
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
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 code price check (UTC time):
Banggood
Banggood warehouse is located in Hong Kong. I don’t think there is an active coupon right now – at least in my database.
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!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
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
(these coupons are old, so probably won’t work)
Price history and price alert
Check out price history chart (for all/most countries) for Haylou RS4 LS12 Smart Watch.
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)).