What a Private Period Tracker Actually Means
'Private' is the easiest word in this category to print and the hardest to verify. Here is what it should mean, how to check it in any app, and what HarmoFlux does.
A private period tracker is one where you can verify the claims: no advertising business, a named list of the third parties that process your data, stated retention periods, and working export and deletion. HarmoFlux publishes all four, has no ads, and does not sell health data.
Written by The HarmoFlux editorial team at Panzica Technologies Inc.. Last reviewed . Editorial standards.
Educational information based on cited authoritative sources. Not individually reviewed by a medical professional, and not medical advice.
Four things you can check in any app
None of these require trusting a marketing page. Each one is either published or it isn't.
- Business model: does the company make money from advertising? An ad-funded tracker has a structural reason to profile you.
- Subprocessors: are the third parties that touch your data named, or described vaguely as 'trusted partners'?
- Retention: does the policy say how long data is kept after you stop using the app, and after you delete your account?
- Control: is there a working way to export your entries and delete your account — not just an email address that may go unanswered?
If an app fails the first one, the other three matter much less.
How HarmoFlux answers each
- No advertising business, and health data is not sold. Revenue comes from the Core and Plus subscriptions.
- Subprocessors for hosting, payments and AI features are listed by name in the privacy policy, with what each one receives.
- Retention periods are stated rather than left open-ended.
- Export and deletion can be requested from the privacy requests page.
Where AI is involved, and where it isn't
Recording periods, symptoms, medications and supplements does not use AI. The wellness insights in the Plus plan and the assistant on this website are AI-powered, and that is disclosed at the point of use. AI features are described on the methodology page.
What HarmoFlux does not claim
- It does not diagnose, and it is not a medical device.
- It does not predict fertility and must not be used for contraception; projected dates are arithmetic on the dates you logged.
- It does not claim that something you took caused a symptom. It records timing only.
One app across the whole lifecycle
Privacy is more valuable the longer you use one tool, because the history compounds. HarmoFlux is built to be used from first periods through perimenopause and postmenopause, so you are not exporting your history into a new app every few years.
Common questions
What makes a period tracker private?
Three things you can check: it does not run advertising or sell health data, it tells you which third parties process your data, and it lets you export and delete what you entered. HarmoFlux publishes all three on its privacy pages.
Does HarmoFlux sell or share my health data with advertisers?
No. HarmoFlux has no advertising business and does not sell health data. The subprocessors that handle hosting, payments and AI features are listed by name in the privacy policy.
Can I delete my data?
Yes. You can request export or deletion of your account data at any time from the privacy requests page, and retention periods are stated in the privacy policy.
Is a free private period tracker realistic?
It is if the business model is subscriptions rather than ads. HarmoFlux has a free plan, a $1.99/month Core plan and a $4.99/month Plus plan, so the product is paid for by people who choose to upgrade, not by monetizing data.
Does HarmoFlux predict ovulation or work as contraception?
No. Any date HarmoFlux projects is a calendar-based estimate from the dates you logged. It is not a fertility prediction and must never be used for contraception.