How accurate is Flo ?

Question

Okay the one at the bottom is my cycle for November and other one at the top is for this month flo says I start on the 15 but i had bleeding on the 11th and I’m trying to see why and I don’t know how to see how long my cycle was can anybody help ?

Answer

Apps only guess. They aren’t accurate.

Answer

I actually find flo is the most accurate for my cycles and my ovulation days but I also update it everyday and have done so for the last 5 months so it started to see my pattern.