App

Happy Fertility

Track your cycle with natural methods, made simple — a few seconds a day, fully private.

Happy Fertility app preview: cycle calendar and current cycle view.

Quick-entry screen: today's sensation and mucus observation in the Happy Fertility app.

Details screen: intercourse, pregnancy, temperature and peak day.

Colour and symbol legend used to mark cycle days.

Cervical mucus observation scale, from non-peak to peak.

Personal notes and pain linked to the cycle.

Cervix observation: height, opening and texture.

The App

An app built for natural methods

Adapted to the three most-followed methods — Fertility Care, the sympto-thermal method and the cervical mucus method — the app lets you log your observations in seconds, with your own keywords, colours and reminders.

In short: a complete, free app that keeps your data to yourself.

The 4 most-used methods:

Fertility Care
Sympto-thermal method
Cervical mucus-based method
I2F chart

Visualise & share

See your cycle in every format

Monthly calendar, temperature chart or detailed history: pick whichever view speaks to you.

An editor built for you

Choose in settings the type of observations you use, your custom keywords, your visual markers for fertile, infertile or period days. And always: no data sent for statistics or advertising.

Share with your partner

Both apps stay in sync: you and your partner can edit the shared calendar.

Temperature curve and cycle signals over a full month.

Monthly calendar with fertile days and periods marked by colour.

Detailed day-by-day history of cycle observations.

Highlights

Easy

Add your observations in the blink of an eye

For everyone

Compatible with the three most-used methods

Together

A calendar shared live with your partner

Pro-friendly

Export your chart for healthcare professionals

Secure

Your data stays on your phone — your cycle, your life

Reminders

Reminders so you never forget to log

Testimonials

“I used to track everything on paper, until this app that takes me 5 seconds to fill in every evening! I never forget to log thanks to my daily reminder, and I use the keywords that make sense to me. I can use my husband's phone when I don't have mine at hand, and I know our data belongs to us! A real peace of mind for tracking your fertility, thank you.”

Éléonore

Track your cycle with peace of mind

A free, secure app built to be used together. Join the couples who already track natural methods with Happy Fertility.

Privacy

Your data isn't used

Our commitment: your data stays exclusively on your phone. Data shared with your partner is encrypted, stored online only for the time of the transfer, then deleted. No information is stored on the internet long-term, and we run no statistics or analysis on your cycle.

Your privacy stays in your hands.