Yup, not tried it with Google Fit yet. I just really got it as an alarm more than anything so there's not much incentive to stray from the official app.
I'm not sure I wanted stuff being sent to ... Well anyone who isn't Google (and only because google already know everything about me anyway so that horse has bolted). I'm using Gadgetbridge which seems to work okay for the data connection, and can set- but not stop- the alarms
Doing the same. Are you using the official app?