Myth 18: Period Apps Can Tell You When You’re Fertile

Are you using a period app to tell you when you’re fertile? Then this myth is for you.

The myth: Period apps can tell you when you’re fertile. 

The truth: Not all apps are created equal.

Did you know there nearly 100 apps to allow women to track their menstrual cycles and are being used to avoid pregnancy?

Well this is what you need to know… only some apps use evidence-based fertility awareness methods (which is where you’ll get effectiveness that rivals the birth control pill).

Beware the predictions! Apps that ask you to simply log when you get your period and then predict your fertile days… well that’s just the good ol’ ineffective, outdated rhythm method disguised in fancy-dancy app technology.

The apps you want to look for don’t predict your fertility or at least allow you to turn that option off. 

And they allow you to record evidence-based signs of fertility like cervical mucus and basal body temperature.

Apps can be a convenient way to record your observations on your phone; but it’s the daily observations you make that tell you when you’re fertile.
So don’t rely on an app to do that for you.

You know your body best.


  1. Dara-Mae C on October 13, 2021 at 10:58 pm

    Hi Chloe! Is there a specific app that you would recommend for tracking cervical mucus and BBT? Daysy and Natural Cycles are really popular with people I know, but I’m seeing negative feedback from actual FAM educators. Is the Apple Health app good enough?

    • Chloe Skerlak on October 14, 2021 at 6:44 pm

      Hi Dara! Thanks for your question. The best app to track your cycle with is one that allows you to track your cervical mucus, BBT, and cervical position and doesn’t make predictions for your fertile time (like Daysy and Natural cycles). My favourite app is Read Your Body!

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