fabm.app Open the app →

An easy way
to chart
your cycle.

A daily cycle tracker for anyone wanting to chart their cycle. Free for everyone.

Open the app → How it works

Free forever No account Works on any device

Private by default. Your cycle marks stay on your device.
Works on any device. Phone, tablet, or laptop.

Made for everyone.

  1. 01

    Free forever.

    Paid for by the RRM Foundation, a nonprofit.

  2. 02

    Plain language.

    Two boxes a day. No jargon.

  3. 03

    No sign-up involved.

    Open it on whatever device you have with you.

How it works.

Under a minute a day. You mark what you saw. You read your own chart.

  1. Step 01

    Open fabm.app.

    Type fabm.app into your browser. No download. No account.

  2. Step 02

    Mark what you saw.

    A few quick taps record what you observed today.

  3. Step 03

    Read your chart.

    The History page shows what you marked. You read the pattern.

Questions people ask.

Is fabm.app birth control?

No. fabm.app is a chart that remembers what you mark. If you want to use fertility awareness for family planning, learn it from a trained teacher first.

Will anyone see what I mark?

No. What you mark stays on your device.

Is it really free?

Yes. fabm.app is paid for by a nonprofit, the RRM Foundation.

What does "fabm" mean?

FABM stands for Fertility Awareness-Based Methods. fabm.app is named after them. Read more at RRM Academy.

Does fabm.app work without internet?

After your first visit, yes. fabm.app saves a copy on your phone so it opens even with no signal.

Why this exists

Built by the RRM Foundation.

fabm.app is built and maintained by the RRM Foundation, a 501(c)(3) nonprofit (EIN 93-4594315). RRM Foundation makes accessible cycle tools and fertility education.

Visit RRM Academy → About the foundation →