Natural Cycles Fertility App

55 of 100 · reviews
4.8of 5 · store
29,370ratings on the App Store
500reviews read

An editorial reading of the saved reviews

Natural Cycles is built on basal temperature measurement: the method works for stable cycles with strict logging discipline. Oura Ring integration reduces the effort. Users with regular cycles achieve high accuracy and genuinely stop using hormonal contraception. The problem: at the slightest deviation (irregular cycle, stress, illness, postpartum) the algorithm produces false green days, and several users explicitly report unintended pregnancies. IVF clinic users note that ovulation predictions diverge from lab results by 7-plus days.

Screenshots

What people use it for

A woman with a regular cycle who is willing to measure basal temperature at the same time every day and treats the method as contraception requiring strict discipline.

What reviews praise

With a stable cycle and consistent measurements, the accuracy is impressive: long-term users know the next cycle date in advance.
The feeling of control without hormones is a powerful motivator for the audience that was sidelined by pill side effects.

What reviews complain about

With an irregular cycle, ovulation is predicted with an error of up to a week, confirmed by users with clinical monitoring.
The postpartum period makes the app completely useless.
The algorithm does not explain why a day is red or green, which generates anxiety.

What users experience

2 excerpts from the breakdown. These are individual cases, not a verdict on all users.

As someone with PCOS and a history of fertility struggles, I've tried nearly everything to regulate my cycle and understand my body better. But nothing has been as life-changing as the Natural Cycles app.

I was honestly a bit skeptical about starting this app and I've been seeing it all over my Facebook and my Instagram feed as an ad. Eventually, I decided that I should just try it. I've been on birth control now for the past 12 years and I