When we lived in San Jose, it worked most of the time. The delay scew for tower location was evident, but minimal.
Now that we live in a rural community, with more sporadic cellular reception, not as reliable.
I use this app to time preparation of dinner. Im retired. My younger wife ( By a year or two) is not.
So I try to plan dinner based on where she is at any given time.
So far, about 75% of the time it works great. But that 25% is a bummer.
I dont blame the app. The cell coverage out where I live is spread thin. Hopefully it will get better.
We tried to get our grown daughter to hook up with us on it. Silence.....LOL!