A Flo alternative with no server to subpoena.

Cycle data is the most legally exposed category of personal record in several countries right now. Promises about handling it are only as good as the company, its next owner, and the jurisdiction it sits in. A file removes all three variables.

Flo publishes no price we could verify. We checked on 3 August 2026 and record that absence in our Subscription Price Index.

Why "anonymous mode" isn't the answer

A mode is a setting inside a product owned by a company that can be sold, breached, or ordered to comply. The only architecture that can't disclose your cycle is one that never received it.

Flo does not publish what Premium costs

We looked. There is no price on the open web, and Flo’s own help article titled "What is the price for a Flo subscription" states no figure at all: it tells you to open the app and look at your own screen. So we will not print one here, not even an estimate, because a page about knowing what you are paying for cannot invent the number. Draw from that what you like. We think a price you can only be shown in private, after the app has learned something about you, is worth remarking on.

What it records

Start and end dates, flow, symptoms and notes, and from those it predicts the next cycle and the fertile window with visible arithmetic you can check yourself, rather than a model you can't.

Keeping it private on a shared device

It's a file: name it whatever you like, keep it in an encrypted folder, or on a USB stick. There is no app icon announcing itself on a home screen.

The refund

Thirty days, one e-mail, money back. And the file stays yours either way.