Partner sharing that shows only what you choose
Cycella is a free Android period tracker. If you want, you can let a partner see a little of your cycle, such as when your period is due, so they can be more supportive. It is optional, off until you turn it on, and end-to-end encrypted.
Soon your partner can also use Cycella Partner, a separate app made just for them, with the same rule: they see only what you choose.
What your partner sees
Only the items you switch on, one by one:
- Your mood
- Your next period date
- Your pad stock (whether you are low, and how many pads are left)
- If you turn it on, the days food cravings are likely, learned from the days you log Cravings
Your partner can send back a preset note, such as "I'll bring pads", or type a short note of their own.
What your partner never sees
- Your flow
- Your symptoms (other than food cravings, if you choose to share them)
- Your notes
- Your doctor report
These stay on your phone, even with sharing turned on. Nothing is shared by default, and you can stop at any time. When either of you stops sharing, the shared box on our server is deleted.
How the encryption works
What you share is encrypted on your phone before it leaves, using a key that only your phone and your partner's phone know. Our server relays and stores only the encrypted data and cannot read it. To connect, you give your partner a 10-character code. It expires after 3 minutes, and is deleted after pairing. There is no account on either side, no ads and no analytics. Details are in the privacy policy.
Free, with no account
Cycella launches free, with no paid features. Neither you nor your partner needs to create an account or give a name, email or phone number. Partner sharing is only for people aged 18 and over.
How this compares with other apps
Other period apps have partner features too, and they work differently. This is a short factual comparison, and plans change, so check each app's own pages before deciding.
| App | What to know |
|---|---|
| Cycella | Free. No account. You choose each item shared. Flow, other symptoms, notes and doctor report are never shared. End-to-end encrypted. |
| Flo for Partners | Flo's partner feature. Check Flo's own pages for what is shared and whether an account or a paid plan is needed. |
| Clue Connect | Clue's sharing feature. When we checked in October 2026, Clue's help page said sharing your cycle needs Clue Plus, which is paid. |
We do not make claims about how other apps store or protect data. Flo, Flo for Partners, Clue, Clue Connect and Clue Plus are trademarks of their owners. Cycella is not affiliated with or endorsed by them. If privacy matters to you, our article on what to check before trusting any period app lists the questions to ask any app.
Questions about partner sharing
What can my partner see in Cycella?
Only what you switch on: your mood, your next period date, your pad stock and, if you turn it on, the days food cravings are likely. Nothing is shared by default, and you can turn sharing off at any time.
What can my partner never see?
Your flow, notes, doctor report and symptoms (other than food cravings, if you share them) are never shared, even with sharing turned on.
Is partner sharing encrypted?
Yes. What you share is encrypted on your phone with a key that only your phone and your partner’s phone know, before it reaches our server. Our server cannot read it.
Does my partner need to pay or make an account?
Cycella is free at launch with no paid features, and it never asks for a name, email or phone number. You invite a partner with a 10-character code that expires after 3 minutes.
Is partner sharing available if I am under 18?
No. Backup and partner sharing are switched off for users under 18, so nothing leaves the phone.
The Cycella period tracker is free on Google Play for Android, not yet in the EU or UK. Read about the private period tracker approach, or try the free period calculators.