Using a Haylou RS 4. Being using itfor about 8 months now.
Pros & Cons.
Have watch faces. can download via Haylou app.
teams, whatsapp, twitter and so on, notifications are displaying under the messaging app in Haylou watch.
Calls alert notification are visible but cannot answer a call but can Hang up.
Main thing which I dislike is the messages content, regardless of the app, does not shows in real format. Displayed with NO SPACES.
In terms of exercising, steps, heart rate, bp is slightly correct. Only have difference of a 2 digit 8.
But not sure of the correct reading.
My final conclusion after purchasing this - I bought this because I cannot afford the Samsung Galaxy one or the huawei one. It's sad but what to do. For the amount of money that you going to spend, I would suggest, Amazfit or Imilad or Haylour LS05.
Whatever your choice, read online reviews on reddit and other places.
PS: I would still suggest to buy a General watch. Buying a smart watch is useless. Try wristlab, there support KOKO as well