A private Flo alternative for iPhone
HerFlow tracks your period, moods, and cycle phases without an account, and lets your partner follow along with a random code instead of a linked account.
| Feature | HerFlow | Flo |
|---|---|---|
| Use without an accountNo email, phone number, or sign-in | Yes | OptionalAnonymous Mode, not with Flo for Partners |
| Data used to track youApp Store privacy label | None | YesPurchases, location, identifiers, usage data |
| Partner sharing without an accountNo sign-up for you or your partner | YesA random code is all it takes | NoFlo for Partners links two Flo accounts |
| Free period tracking | YesNo ads, no time limit | YesFlo Premium optional |
Checked on September 25, 2026, against the Flo App Store listing and Flo's help pages. Privacy labels are self-reported by each developer. See how HerFlow compares with Flo, Clue, Stardust, and Natural Cycles in the full comparison.
HerFlow is not a medical device or a contraceptive; its predictions are estimates. Flo is a trademark of its owner, which is not affiliated with HerFlow.
Why people switch from Flo
No account, even when you share
HerFlow works the moment you open it, with no email, phone number, or password. Sharing doesn't change that: there's no account to link, only a random code.
Nothing used to track you
HerFlow has no ads, no analytics, and no tracking SDKs. Its App Store privacy label lists no data used to track you, where Flo's lists purchases, location, identifiers, and usage data.
Made for the people who support you
Your partner, friend, or family member sees your cycle day and phase, a plain explanation of what it may feel like, and daily tips on how to support you.
Switching from Flo takes a minute
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Get HerFlow
Download it free from the App Store. There is nothing to sign up for.
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Add your cycle
Enter the start of your last period and your usual cycle length, and HerFlow shows your phase right away.
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Share, if you want to
Give your random code to your partner or someone you trust, and they follow your cycle with tips on how to support you.
Is HerFlow a good alternative to Flo?
Yes, if privacy matters to you. HerFlow works without an account, declares no data used to track you on its App Store privacy label, and never links your cycle to your name. It predicts your period and fertile window, logs moods and symptoms, and explains each phase of your cycle in plain language.
Can my partner follow my cycle like with Flo for Partners?
Yes. Give your partner your random code, and once they enter it in their copy of HerFlow they see your cycle day and phase, get a heads-up when your period is due or a phase changes, and receive daily tips on how to support you. Neither of you creates an account. Following someone is part of the People subscription, which starts with a free 7-day trial that needs no payment.
Do I need an account to use HerFlow?
No. There is no sign-up, login, or password, and HerFlow never needs your email, phone number, or Apple ID. You can start tracking the moment you open the app.
Try HerFlow on your iPhone
Free to track your own cycle. No account, no ads, no analytics.