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 a sister, 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: Hers is not on Google Play, it has no health content, and there is 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 not on Google Play. Choose Flo too if you want its health library — years of articles, symptom explanations and a chat assistant — or pregnancy and perimenopause modes. Hers has none of these, and is not trying to. 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 you want someone else to follow along from their own phone — while you choose what they see and can disconnect anytime — that is exactly what Flo for Partners does. Hers has no equivalent. There is nothing to share in Hers, because there is only one phone. There is another side to this: 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 the better tool
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.
It also means you only log once. Hers Pro syncs with Apple Health’s menstrual data, so a period you record here shows up in Apple Health too, and one you recorded elsewhere shows up here — you are not keeping the same month in two places.
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 two PMS windows land on the same days — that is the hard week 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. Hers is the other shape: one phone, up to three cycles, nothing to pair.
Is Hers a good alternative to Flo?
It depends on what you want. If you want one app for your own cycle with a large health library, pregnancy mode, and an Android version, Flo is the better tool and Hers does not try to compete with it. If you want 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. Flo for your own cycle and its health content, Hers for the shared calendar that holds two or three people. They do not talk to each other, so nothing gets confused.
Can I bring my Flo history into Hers?
Not automatically from Flo. Flo’s help center says “logged Menstruation data in Flo will not be sent to the Health app”, so your Flo history will not reach Hers that way. What does come across is anything already in Apple Health from other sources — Hers Pro reads those period records in when you connect it. For a copy of your Flo data, you can ask Flo for an export.
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.
Flo and Google Health
Flo and Google Health announced a partnership on October 12, 2026, and Google says a two-way sync will arrive “early next year” (i.e. early 2027). It does not change any row in the table above, but if that is what you came to read about, we wrote it up on its own page: Flo and Google Health.
About this page
Everything said about Flo here comes from Flo's own published help pages and product tour, checked in October 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.