Hi there,
Personally, I bought it for its health applications (number of steps, heart rate, sleep, etc).
It is possible to install applications but there are very few. The applications are from Huawei.
More info here: https://www.youtube.com/watch.
have a nice day

Hello
Unfortunately, I can't give you a well-founded answer to your question. The offer on the "clock" is enough for me.

What I can say, however, is that sleep recording is relatively pointless. I'll explain straight away; if, like me, you read a lot, even in bed (i.e. without much movement), the watch thinks you're asleep or taking a nap (during the day), depending on the time of day. Since you can't edit the recorded sleep data in the app, I don't think the sleep recording is meaningful.

No idea