Is Glow calculating your period day properly?

Question

I just noticed that Glow was showing my period due on 19 June when in fact  it's on 23 June?
Last period on 26May, regular 28day cycle. 
Is it an app? I can only amend period dates when period is on, which I don't need; but prediction is definitely wrong? Anyone?

Answer

Depends how long you've been tracking and every time you adjust it, it learns more. I've been tracking for a long time and glow realized that my cycles have became longer before I did. I kept thinking my period was late every month and spent a lot of money peeing on all sorts of sticks even though I wasn't TTC then 🙈. Also, the calculations are mathematics and statistics. Biology doesn't always comply 😅

Answer

If you've entered the results of OPKs that didn't match its prediction that could be why (it moved my predicted period date for this reason)

Answer

Same with me! AF last month was 22. I have a very regular 28 day cycle so it should 20th but Glow and Ovia say 19 lol. Confused!

Answer

I think its the app, said i was suppose to start June 11th when ovia said the 14th. Ovia was right come on time.

Is Glow calculating your period day properly?

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