My period

Kendra • *I am me and no one else*
I just started glow last month and I was wondering how accurate the period thing is? I'm not sure if I have a 28 day cycle thingy or not. It says I was suppose to start today and my period has always arrived when it was suppose too. A month in between give or take a few days. Anybody remember when they first started glow how accurate it is?