Brand Zeblaze, Bluetooth Version BLE 5.0, APP Name GloryFit, Operating Mode Full Touch, Compatible OS Android 5.0 or above; iOS 9.0 or above, Model GTR 3.
Basically copy coupon, view price history or create e-mail price alert. 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 coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. So I have checked for active coupons (all category coupons and old ones), but there was no working coupon in Banggood.
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/i1u
Old coupons (from the oldest to the newest): BGbf11dd, BG86c60e, BG4239df, BGffad8b, BGSaleFeb8, BGb8e78e, BGc56daf, BG323942, BG00d153, BG284c49, BGf4de63, BGcf7158, BGCOUPERT8
(probably won’t work, but you can try them out)
Price history and price alert
Check out price history chart (for all/most countries) for Zeblaze GTR 3 Smart Watch. The lowest price was: $20.99.
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)).