How accurate is the glow period predictions?

Keya

My cycle is all over the place starting from last month till April 2016 .....40, 28,56,39,41,47,34,43,37,47 does glow calculate an average between the cycle to get an accurate cycle for you? For example glow said I start my period Monday the 17th do you think that's accurate?

Glow Resources

Let’s Glow

Glow is here for you on your path to pregnancy

Glow helps you navigate your fertility journey with smart tools, personalized insights, and guidance from medical experts who understand what matters most.

25+ million

Users

4.8 stars

200k+ app ratings

20+

Medical advisors