The short answer
Flo Health and Google Health announced a partnership on October 12, 2026. The sync is not live yet, and Google says it will be opt-in.
Google’s words: “Beginning early next year, you will be able to easily sync your Flo Health app with Google Health.” (i.e. early 2027) The company describes the whole thing as built on “a strict, transparent opt-in model”, and the connection runs in both directions. If you would rather your cycle data never sat on a company server in the first place, that is a different kind of app — there is a note about that at the end.
What Flo and Google announced
On October 12, 2026, Google published a post describing a long-term partnership with Flo Health, organised around what it calls “four central pillars”. The first one is “Secure, consent-based app syncing”.
On timing, Google says: “Beginning early next year, you will be able to easily sync your Flo Health app with Google Health.” The post is dated October 12, 2026, so “early next year” means early 2027. Nothing has changed inside either app today.
It is also not a one-way pipe. Google says your cycle data from Flo can be linked with your Google Health metrics, and then: “Similarly, the data from your Google Health app will be made available to Flo for a deeper, more personalized, and consistent experience between apps.” Alongside the sync, Google announced an investment in Flo Health and an integration with Google Health Coach.
Is it optional?
Google is explicit on this point: “this entire experience is built on a strict, transparent opt-in model”. It goes a step further on the mechanics: “No data will move between the apps without your explicit permission — given separately for each type of data and each purpose — and you have the control to withdraw permission at any time.”
We are not going to describe what the settings screen will look like, because the feature has not shipped and we have not seen it. What Google has put in writing is per-purpose consent that you can take back.
What Google promises about the data
“Flo data shared with Google Health will never be used for advertising, never be sold, and will not be made available to other apps or developers through Google’s health platforms.”
That sentence is worth reading closely, and not as an accusation: it is about Flo data that is shared with Google Health. It is a commitment about one direction of one connection, which is exactly what it says it is. It is not a summary of everything either company does with the data it already holds, and it does not claim to be.
What data could move between the apps
Google names four of its own metrics in the announcement: resting heart rate, heart rate variability, skin temperature, and sleep stages. Those are the signals a watch or a ring collects while you sleep, and lining them up against a cycle is the stated point of the partnership. From the Flo side, the post refers to your cycle data without listing the individual fields.
Questions worth asking before any health-data sync
None of these are specific to Flo. Any time two health apps offer to connect, these are the things that decide what you are actually agreeing to:
- Where does the data physically end up — on your device, or on a company’s servers?
- Can you delete it on both sides, and does deleting it in one place remove it from the other?
- Can you switch the connection off later, and what happens to what already moved?
- Is consent given per category and per purpose, or is it one switch for everything?
- Open the app’s App Store page and read Apple’s privacy label. The section called “Data Used to Track You” is the one to look at first.
If you want your cycle data to stay on your phone
Plenty of people will want this sync, and for a real reason: a watch that knows your resting heart rate overnight genuinely sees things a calendar cannot. Other people would rather their cycle not be on any company’s server at all, whatever promises are attached to it.
That second preference is the one Hers is built around. There is no account and no Hers server holding your cycle, so there is nothing on our side to share with anyone or to sell. Entries stay on your iPhone, and Hers Pro syncs them with your own Apple Health. One calendar can also hold up to three people, each with their own colour and their own predictions — if that is what brought you here, there is a longer side-by-side with Flo, including the things Flo does better.
Questions
Does Flo share data with Google?
Not yet, and when it does it is meant to be your choice. Flo Health and Google Health announced a partnership on October 12, 2026. Google describes it this way: “this entire experience is built on a strict, transparent opt-in model”, and adds that “No data will move between the apps without your explicit permission — given separately for each type of data and each purpose — and you have the control to withdraw permission at any time.” Google also says “Flo data shared with Google Health will never be used for advertising, never be sold, and will not be made available to other apps or developers through Google’s health platforms.”
When does the Flo Google Health sync start?
Google says: “Beginning early next year, you will be able to easily sync your Flo Health app with Google Health.” The announcement is dated October 12, 2026, so that means early 2027. It is not live yet.
Can I track my period without syncing to Google?
Yes. Google describes the Flo sync as opt-in, so you can leave it off and keep using Flo as before. If you would rather your cycle not sit on a company server at all, there are apps built that way: Hers has no account and no server holding your cycle, so entries stay on your iPhone, and Hers Pro syncs them with your own Apple Health.
About this page
Every quotation on this page is taken verbatim from Google’s own announcement, checked in October 2026. The only words here that are ours rather than Google’s are the reading “(i.e. early 2027)”, which is why it sits outside the quotation marks. Announcements 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. Google and Google Health are trademarks of Google LLC. Hers is not affiliated with, endorsed by, or connected to either company. We named them because you asked about them, not because they asked us to.