Accurate, affordable ovulation-cycle insight.

Know your fertile days in real time with personalized, private predictions that put you in charge of your cycle.

The Problem

Only 13% of women can accurately estimate when they are ovulating & likely to conceive.

19 million women in America today lack reasonable access to contraception.

61% of women have deleted a specific health app because of privacy concerns. 

Your Biology, Your Results

The Fernn Difference

>97% accurate - Know your fertile window in real time, not after ovulation

Custom ovulation-window predictions - Based on your hormones, not averages

Secure & anonymous - Your data is always private, never shared

Reusable & non-invasive - Simple testing, no strips, nothing invasive

Affordable - Evergreen device + 1-year app subscription, just $89

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