The Best Flo Alternative in 2026 — Private, Accurate, Built for Real Cycles

Flo is the most downloaded period app in the world. It's also the app that was required by the FTC to notify users that it had shared their health data with Facebook and Google — data users were told would be kept private.

What Flo gets wrong

In 2021, the Federal Trade Commission settled with Flo Health after finding that the company had shared sensitive health information — including menstrual and pregnancy data — with third-party analytics firms, contrary to its privacy policy. Flo was required to obtain independent privacy audits and notify affected users. The settlement is a matter of public record.

Beyond privacy, Flo's prediction model is built around average cycle data. For women with cycles that fall neatly between 26 and 32 days, it works reasonably well. For women with PCOS, perimenopause, post-hormonal-contraception irregularity, or cycles outside that range, the predictions are often wrong — and wrong in ways that matter if you're trying to understand your fertility window or predict symptoms.

This isn't a design failure. It's a consequence of Flo's business model: free app, ad-supported, large user base, optimised for the statistical majority. If your cycle is irregular, you're an edge case in a model built for averages — we wrote up why averaging breaks on irregular cycles, including where our own approach still falls short.

What to look for in a Flo alternative

If you're switching, it's worth being specific about what you actually need. A useful alternative should have:

One practical note, and an honest one about the limits. Flo doesn't publish an export format — you request your data through their support chat and they email back a TXT or JSON file whose structure isn't documented anywhere — so there is no one-click Flo import, and we're not going to pretend otherwise. What does work: if you can get that data into a spreadsheet and save it as CSV, Dawn Phase lets you map your own columns and shows you exactly what will be added before anything is saved. How importing works →

Why Dawn Phase was built

Dawn Phase was built by someone with PCOS who was frustrated with two things: apps that broke with irregular cycles, and apps that treated health data as an asset to monetise.

Dawn Phase is free to use. There are no ads, no data brokers, no third-party analytics on your health information — and because we don't sell or share your data, there's no structural incentive to treat you as the product.

The cycle engine builds every prediction from the median of your own intervals, and counts an interval of up to about four months as a real cycle rather than an error. When you skip a month or run unusually long it hedges, then pauses predictions rather than counting up a “late” number indefinitely — and recalibrates from your next logged period. Symptom tracking covers 16 presets plus any symptom you name yourself, and the insights view shows how your symptoms pattern across phases over multiple cycles.

The doctor export generates a clean PDF of your cycle history — dates, symptoms, patterns — that you can share at appointments instead of trying to recall months of data from memory.

What Dawn Phase does now

This post was first written in May 2026. Several things have shipped since, and they are worth listing plainly rather than leaving the description out of date:

Side by side

This comparison reflects publicly available information as of 2026. Always verify current privacy policies directly. The FTC settlement with Flo Health (2021) is a matter of public record. This article is for informational purposes only.