Privacy Policy
1) Summary
Yuni works without an account, and an account changes where your data lives:
- Without an account, everything you enter stays on your device. Cycle dates, notes and preferences are never uploaded, and we cannot see them.
- With an account (Sign in with Apple or Google), the entries you make in Yuni are stored on our servers, so they survive a lost phone, reach your other devices, and reach your partner if you connect one. See Section 2.
- We use PostHog for usage analytics (no ad networks, no advertising trackers). See Section 2.
- We use Adapty for subscription management. See Section 4.
- We use Apple Health (HealthKit) to read and write period and intimacy data — with your explicit permission. See Section 5.
Apple requires developers to keep App Store privacy disclosures accurate and up to date.
2) Data we do and do not collect
We never collect or store:
- Your messages, contacts, photos, or camera roll contents
- Face data or biometric identifiers
- Precise location
- Card numbers or other payment details (Apple takes payments in the iPhone app; Stripe and Onelink take them on the web, see Buying Yuni on the web)
Stored on your device:
Depending on the features you use, Yuni stores the following locally on your device:
- Cycle tracking inputs (e.g., start date, cycle length preferences, phase estimates)
- Notes, journal entries, and saved preferences
- Reminder settings (if you enable notifications)
- App settings (language, appearance, onboarding answers, etc.)
- Period start dates imported from Apple Health, if you grant access
If you never sign in, this is the only copy that exists, and we cannot access it.
Stored on our servers, if you create an account:
An account is optional and off by default. Signing in is what makes your entries survive a lost phone, reach your other devices, and reach a partner you connect. It also means the following is stored on our servers:
- Your email address and the identifier Apple or Google returns at sign-in
- Confirmed period start dates — including dates imported from Apple Health
- Daily check-ins: your rating of the day, the tags you choose, and any note you write
- Self-reports, if you are the one tracking: mood, energy, symptoms, needs, and any note
- Intimacy entries you log, including their tags and notes
- Cycle settings for the profile you track (cycle length, period length, preferences)
- AI reports you ask Yuni to generate, and the entries they are generated from
- A push notification token, plus your device's time zone and language, if you enable notifications
This data is stored on servers in the EU and the UK. If you connect a partner, the entries belonging to the cycle you share are visible to them — that is what connecting is for. Deleting your account in the App deletes all of it from our servers.
Usage analytics (PostHog):
We use PostHog (posthog.com) to collect usage events, for example which onboarding steps are completed, whether features are used, and purchase funnel steps. This helps us understand how the App is used and improve it.
- Before you sign in, events are tied to a random identifier. After you sign in, they are tied to your Yuni account id, and Yuni on the web also gives PostHog the email you signed in with. The iPhone app does not send your email.
- The quiz at yuniapp.co.uk/start never sends PostHog your email, her name, her dates or what you answered about her cycle. See The quiz at yuniapp.co.uk/start.
- We do not collect cycle dates or notes via analytics.
- PostHog data is stored on servers in the EU.
If you prefer not to be included in analytics, you can contact us at [email protected] and we will opt you out.
3) Permissions the App may request
Depending on features you use, the App may request:
- Notifications (to send reminders or prompts you enable)
- (Optional) Calendar access only if you choose a feature that writes events (if the App supports it)
- Apple Health (HealthKit) — to read your period history and intimacy entries, and to write period start dates and intimacy entries back. You choose exactly which data types to share via the HealthKit permission sheet.
- No contact access is required for core functionality
You can revoke any permission at any time in iOS Settings.
4) In-App Purchases
If the App offers paid features via In-App Purchase:
- Apple processes payment details.
- We use Adapty (adapty.io) for subscription management and paywall functionality. Adapty receives limited entitlement data (e.g., whether a subscription is active) to unlock features. See Adapty's Privacy Policy at adapty.io.
- We do not receive your full payment information.
- Refund evaluation: If a refund is requested for an in-app purchase, we may provide Apple with information about your in-app purchase activity to help Apple evaluate the request. This may include time since app installation, total app usage time, an anonymous account identifier, whether the in-app purchase was consumed, whether it included a trial period, total amount spent, and total amount refunded. This data is shared with Apple only and is not used for any other purpose. By using the App, you consent to this data sharing; you can revoke consent at any time by contacting us at [email protected].
The quiz at yuniapp.co.uk/start
The quiz stores your answers in your browser. What you tell us about her stays there until you create an account or sign in. Then it is saved to your account like any Yuni profile, unless your account already has one: her name, the date her last period started, how long her cycle and her period usually last, whether her cycle is irregular, whether her date is an estimate, and your time zone. Where you did not give a date or a length, Yuni saves an estimate instead.
We measure how the quiz is used with PostHog. For most questions it records which option you picked. For questions about her cycle it records only whether you answered, and an answer that names a health condition is recorded only as a health reason. It never gets her name, her dates or your email from the quiz. Screen recording is off on the quiz. When you sign in, PostHog links your quiz visit to your Yuni account id (see Section 2).
Before you see the plans page, usually while the quiz builds your plan, we ask Adapty, which runs Yuni's subscriptions, which version of that page to show you, and later tell it when you have seen it. For that, Adapty gets a random id for your visit, your country and language, how you reached the quiz, and whether you are supporting a partner or tracking your own cycle. During the quiz it gets nothing else: not your email, her name, her dates or your other answers.
If you give us your email, we use it to send the link to your plan and, only if you ticked the box, tips and news. We keep it until you ask us to delete it, with a record of where you came from and, if you ticked the box, when you ticked it and the wording you agreed to.
Buying Yuni on the web
Payments go through Stripe and Onelink, LLC. We never see or store your card number. Onelink uses your payment details, email and billing address to take the payment, calculate tax and prevent fraud, under its own privacy policy.
We keep a record of your plan (its status, dates and the email you paid with) so Yuni knows you have Yuni Premium.
Adapty, which the iPhone app uses to unlock Yuni Premium, reads your subscription from Stripe: the plan, whether it started with a free trial, its price and its dates, and the details we attach to it. Those details are your Yuni account id once you have one, which version of the plans page you bought from, your time zone, the id of your quiz visit and the id PostHog knows you by. Stripe may also pass Adapty the email you paid with.
We use the country your connection comes from to choose the currency the plans page shows, to offer checkout only where our payment partner can handle the tax, and to keep Yuni free on the web in countries where we cannot sell it.
5) Apple Health (HealthKit) integration
Yuni uses two Apple Health data types, and only with your permission. Which of them applies depends on how you use the App: if you track your own cycle, both; if you use Yuni to support a partner, Yuni writes your own intimacy entries and reads nothing at all.
Data Yuni reads (with your permission):
- Menstrual flow history — to import your existing cycle data and avoid manual re-entry
- Sexual activity — only to check whether Apple Health already has an entry on a given day, so Yuni does not write a duplicate
Data Yuni writes (with your permission):
- Confirmed period start dates — to keep Apple Health in sync with your entries in Yuni
- Intimacy entries you log in Yuni, recorded as sexual activity
What leaves your device:
The Health samples themselves are never uploaded. One thing derived from them can leave: the date of a period start read from Apple Health. If you have an account, that date syncs to your other devices and to a connected partner exactly like a period start you enter by hand. Nothing else Yuni reads from Apple Health is transmitted anywhere.
What Yuni does NOT do with HealthKit data:
- Use it for advertising or marketing
- Share it with analytics services (PostHog does not receive any HealthKit data)
- Sell it, or disclose it to anyone other than the partner you choose to connect
You can revoke HealthKit access at any time in iOS Settings → Health → Data Access & Devices → Yuni. Revoking access does not delete data already saved in Apple Health by other apps.
6) Device backups and iCloud
Yuni does not write your data to iCloud itself — cross-device sync, where you use it, runs through your Yuni account instead (Section 2). Your device may still back up app data depending on your Apple settings (for example, iCloud Backup). Apple's handling of backups and sync is governed by Apple's policies and your settings.
7) Data retention
- On-device data: kept until you delete it in the App (if available) or delete the App from your device.
- Account data on our servers: kept for as long as your account exists. Deleting the account deletes it.
- Purchase entitlement status (if applicable): retained only as needed to provide access to paid features.
8) Your choices and controls
You can control your data by:
- Editing or deleting content inside the App (if the App provides deletion controls)
- Disabling notifications in iOS Settings
- Deleting the App to remove locally stored data
- Revoking HealthKit access in iOS Settings → Health → Data Access & Devices → Yuni
- Deleting your account in the App, which removes your server-side data
If you have an account, write to us and we will export or delete what our servers hold. If you have never signed in, your data exists only on your device and there is nothing for us to export.
9) Security
We rely on iOS security features for data on your device. Account data travels over TLS and is stored with our hosting providers in the EU and the UK. No method is 100% secure; you are responsible for securing your device, passcode/Face ID settings, and backups.
10) Children's privacy
The App is not intended for children under 13 (or the applicable minimum age in your region) without parental consent. We do not knowingly collect personal data from children.
11) International users
Yuni is operated from the United Kingdom. If you use an account, your content is stored on servers in the EU and the UK. Apple may process App Store purchase and device-related data under Apple's own policies.
12) Changes to this Privacy Policy
We may update this policy from time to time. If changes are material, we will provide notice within the App or via the App Store listing where feasible.
13) Contact
Privacy questions: [email protected]