Yes, and Plum is the one built for it. You make a group, send your daughter the invite link, and once she joins you each see the other’s period days on one calendar. Neither of you sees the other’s symptoms or moods. Groups are free. Plum is rated 13+ and runs on iPhone, so for a girl under 13 we’d start her on Oky instead. Apple Health Sharing and Clue Connect can share too, but only one way.
How we chose
We make Plum, and there are no affiliate links here. We read each company’s own help pages and App Store listings, most recently on October 16, 2026. We looked for one thing first. Can a mom and a daughter both see each other’s dates, from their own phones, without either one seeing the other’s whole log? Then we checked the age rating and what it costs.
Why a mom and daughter share period dates
Mostly for practical reasons. You know when to buy pads before they run out, and nobody gets caught out on a trip. You can see a late or long cycle without asking about it at dinner. A lot of girls find it easier to tap “join” than to bring it up.
It also helps you know what’s normal for her. ACOG’s page on a first period says cycles of 21 to 45 days are normal for teens and can take six years or more to settle. A calendar you both see makes the odd 40-day cycle less alarming, and it makes a real problem easier to spot.
Plum, for seeing each other’s dates both ways
A Plum group is a few people who’ve agreed to see each other’s period dates. Everyone in it sees everyone, so you see hers and she sees yours. Each member’s last period, next expected period and whether today is a period day show up on one timeline. If you track exercise, the days you worked out show too, and that has its own switch.
Everything else stays in each person’s own account. That covers symptoms, mood, flow, sex, birth control, the fertile window and ovulation day. The shared fields are fixed in the app’s code, and nothing a group admin does can widen them. Our page on what a group can see lists every field. That limit matters with a teenager. She can share her dates with you and still keep her log private.
To set one up:
- Open the Groups tab in Plum and tap Create a group. Give it a name, like Mom and me.
- Tap Invite friends and send her the link in Messages.
- She opens the link on her iPhone, signs in to Plum and joins. You both see each other from then on.
A group holds up to 100 people, so sisters, aunts and grandmas can join the same one. Every group has its own sharing switch, and anyone can leave a group whenever they like. Plum has no ads and never sells data. Logging, predictions, reminders and groups are free, and Plum Premium adds insights and the full set of phase tips.
Apple Health Sharing, for one-way sharing on iPhone
If your daughter already tracks in Apple’s Health app, she can share Cycle Tracking with you. Apple’s iPhone guide has her tap Sharing, then Share with Someone, pick you from her contacts and choose what to share. Apple’s Health privacy paper caps it at five people. Both of you need an iCloud account with two-factor authentication, and you read her data in your own Health app on an iPhone or iPad.
It’s private and costs nothing. But it runs one way. If you want her to see your dates too, you have to set up a second share, and you’ll each see the other in a separate list rather than on one calendar.
Clue Connect, for watching one cycle
Clue Connect shows the people you invite your period days, fertile days, ovulation and PMS. Clue says it’s for partners, friends or family. Its help centre also says you can’t share your cycle and view someone else’s at the same time, and sharing needs Clue Plus. So a mom and daughter on Clue can’t both share with each other. One of them shares, and the other only views.
Flo has a sharing mode too, but Flo for Partners is made for couples, one partner at a time, and it doesn’t fit a family. Our friends sharing guide covers Stardust and the other apps with a friends feature.
Side by side
| Both see each other | What’s shared | Cost to share | Phones | |
|---|---|---|---|---|
| Plum groups | Yes, on one calendar | Period dates, plus exercise days if tracked | Free | iPhone, rated 13+ |
| Apple Health Sharing | Only with two separate shares | The Health topics she picks | Free | iPhone or iPad for both |
| Clue Connect | No, one shares and one views | Period, fertile days, ovulation, PMS | Clue Plus for the one sharing | iPhone and Android, rated 13+ |
| Flo for Partners | No, made for one partner | Calendar and phase tips | Basic access free | iPhone and Android |
If she hasn’t started yet, or she’s under 13
Most period apps are rated 13+, Plum and Clue included. For a younger girl, Oky is the better start. UNICEF made it for girls aged 10 and up, it’s rated 9+, and it explains periods as well as tracking them. It has no way to share with you, so you’d talk about dates the old way. Our guide to period tracker apps for teens goes through the age ratings, and you can move her to a shared group once she’s 13.
Do a mom and daughter’s periods sync?
It often feels that way when you live together, but the studies don’t find it. Two cycles of different lengths drift into overlap and back out again. Our syncing guide explains why. A shared calendar lets you check for yourselves.
A few ground rules that help
Let her set up her own app. It’s her log, so she picks what to track. Join the same group and track your own cycle in it, so sharing goes both ways and doesn’t feel like being watched. Tell her she can turn sharing off for the group, and mean it. And if a period is very heavy or lasts more than 7 days, take that to a doctor rather than an app.
