I tried to make a statement by buying one of those smart watches in AliExpress and the results were so bad that I returned the watch even if the reason I purchased them for namely the offline maps were somehow functioning, although that's a very long way until it becomes practical. What didn't function? Everything else. The heart rate sensor the compass the altimeter and many of the other so-called smart functions none operated properly making this watch unusable in the field.
This text is not even a pretence of re-writing a marketing bull generated by an auto-generated Chinese no-brand (dnt1 what?), it's just copy and paste.