Heart rate monitoring app Google fit

Hi. Are there any apps that monitoring heart rate and sync data in google fit?
I have lemfo lem15 and heartontop do not working properly…

Hi. plz can you write link of the app that you use… thanks

I just have ? Click on the link in the post above . I have not tested this

Download to your pc
Drag it into download folder on watch
Tap on it and install ( allow permissions )

Hi. I’ve installed heartontop from playstore. it works without sync in google fit. but are there any other app?