The short answer
Flo gives one person one calendar. Hers gives one phone up to three.
Almost everything below follows from that one line. If you are looking for a Flo alternative because you want more than one person’s cycle in one place — you and your partner, you and your daughter, you and a friend — Flo’s Partner Mode is not that. It lets someone else follow your cycle from their own phone, read-only, after you both install the app and pair with a code. It does not give you a second cycle to log.
Side by side
Three of those rows go Flo’s way, and none of them are small: there is no Android version of Hers, no health content, and no way for someone to follow along from a second phone.
To put it plainly: if what you need is guidance about your body — what a symptom might mean, what to expect week by week, something to read when you are worried — we would send you to Flo. It is a genuinely good product and it does that far better than we do. If what you need is a plain calendar that holds more than one person, and a reminder before the hard week arrives, that is what Hers is for.
When Flo is the better tool
If the phone in question runs Android, this page ends here — Hers is iOS only and no Android version is planned. Choose Flo too if you want the health library, which is years of articles, symptom explanations and a chat assistant, or pregnancy and perimenopause modes, none of which Hers has or is trying to have. And if you are tracking only yourself, Flo is simply the bigger and better-resourced app for one body.
One more, and it is the one people miss. If the point is for someone else to follow along from their own phone, with you deciding what they see and free to unlink whenever you want, that is exactly what Flo for Partners does and Hers has no equivalent. There is nothing to share in Hers, because there is only one phone. That also cuts the other way: Flo keeps your data on its servers so it survives a lost phone, while a Hers calendar lives on the phone you built it on and in your own iCloud. We have no server and cannot read it, which also means we cannot restore it for you.
When Hers is
When one calendar has to hold more than one person. Up to three, each with their own color and their own predictions, on the same month view. Tracking one person is free; the second and third come with Hers Pro at $15.99 a year.
When the other person does not want an app. No email, no phone number, no sign-up, no invitation, no pairing code — one person keeps the calendar and logs everyone’s days. This matters more than it sounds: the most common reason a shared tracker fails is that the other person never installs it, and there is nothing here for them to install. And when what you actually need to see is the week where two PMS windows land on the same days, which is the week that is hard when two people in one house both menstruate.
One thing worth saying plainly. Apps that add a partner feature are usually written for a boyfriend or a husband, and the person following along is assumed not to have a cycle. In Hers everyone in the calendar is tracked and predicted the same way. Two women, two sisters, a mother and a daughter, two friends: the same three slots, no roles.
And plenty of people keep both — Flo for their own cycle and its content, Hers for the shared calendar. The two do not talk to each other, so nothing gets confused.
Questions
Can Flo track two people?
No. A Flo account holds one person's cycle. Flo for Partners lets someone else follow your cycle from their own phone in a read-only view, after you both install the app and pair with a code. It does not give you a second cycle to log.
Is Hers a good alternative to Flo?
It depends on what you want. For one person's cycle with a large health library, Flo is the better tool and Hers does not try to compete with it. For more than one person in a single calendar, without accounts and without asking anyone to install anything, Hers does that and Flo does not.
Do I have to stop using Flo to use Hers?
No, and plenty of people keep both. They do not talk to each other, so nothing gets confused.
Does the other person need to install Hers?
No. There is no account, no invitation, and no pairing code. One person keeps the calendar and logs everyone's days on their own phone. Nothing passes between devices because there is only one device.
About this page
Everything said about Flo here comes from Flo's own published help pages and product tour, checked in September 2026. Apps change; if something on this page has gone out of date, tell us and we will fix it.
Flo is a trademark of Flo Health, Inc. Hers is not affiliated with, endorsed by, or connected to Flo Health in any way. We named their app because you asked about it, not because they asked us to.