Privacy Policy

Last updated: July 2026

1. What data we collect

Here is exactly what we collect, and what we don't:

• We do not collect your day-to-day skin logs, severity ratings, exposure entries, notes, food logs, photos or GP export data. This is stored locally on your device only, and we never see it.
• Onboarding answers. When you first set up Skintrics, we ask a handful of questions about your skin (condition, severity, how often it flares, how long you've dealt with it, what you've tried, your goals). We send these answers to our analytics provider, TelemetryDeck, so we can understand our users in aggregate — for example, which conditions are most common, or where people drop off during setup. This is not linked to your name or email address.
• Name and email address. When you sign in with Apple, we request your name and email so we can identify your account and send you product updates through Mailchimp, our email provider. If you use Apple's "Hide My Email," we only ever see the private relay address Apple generates, never your real one. You can unsubscribe from emails at any time using the link in any email we send.
• Weather data — if you grant location permission, we request current weather data from OpenWeatherMap using your approximate location. We do not store or log your location.
• Ad measurement. If you consent via Apple's App Tracking Transparency prompt, we share limited events (such as app install, trial start or subscription purchase) with Meta so we can measure whether our ad campaigns are working. This never includes your health data, onboarding answers or skin logs. If you decline the prompt, this is switched off.
• Subscriptions. We use Superwall to display and manage our subscription screens, alongside Apple's StoreKit, which handles all payment processing directly.
• Community content — if you choose to use the optional Community feature, what you post there is handled differently from everything above. See Section 3.

2. Where your health data is stored

Your skin logs, exposures, notes, food logs, photos, severity ratings and GP export data are stored exclusively on your iPhone using Apple's SwiftData framework. This never leaves your device, is never backed up to our servers, and is never accessible to us.

Your one-time onboarding answers, and your name and email address, are sent to the third-party services listed in Section 5 below, for the specific purposes described there.

If you enable iCloud backup on your device, Apple may back up your on-device data as part of your standard iCloud app backup. This is governed by Apple's privacy policy, not ours.

3. Community features

Skintrics includes an optional Community area where you can post to condition-specific groups under an anonymous display handle, reply to others, and send direct messages. If you choose to use it:

• Your posts, replies and direct messages are stored using Apple's CloudKit, in a shared database — not on your device, and not private the way your health logs are.
• Other members can see your handle and anything you post publicly. Direct messages are visible to you and the recipient only, but they are not end-to-end encrypted, so please don't share anything sensitive in them.
• Your activity is linked internally to an account identifier from Apple's CloudKit system — never your name, email or Apple ID — so other members never learn who you really are. We use that identifier only to support blocking and moderation.
• You can report a post or block another member at any time from within the app. We review reports and may remove content or restrict accounts that break our guidelines.
• If you'd rather nothing you do is visible to anyone else, simply don't use the Community tab — every other part of the app works exactly the same without it.

4. Data deletion

Deleting your account from within the app permanently deletes everything stored on your device: your health logs, exposures, notes, food and skincare logs, photos, saved preferences and onboarding answers, and your Apple sign-in link. This cannot be undone.

Content you've posted to the Community — threads, replies and direct messages — lives in the shared CloudKit database described in Section 3, separately from the on-device data above, and is not automatically removed when you delete your account, since it may still be visible in ongoing conversations with others. If you'd like specific posts or messages removed, contact us using the details in Section 9 and we'll take care of it.

To stop receiving marketing emails, use the unsubscribe link in any email, which removes your address from our Mailchimp list. Onboarding analytics sent to TelemetryDeck is anonymous and not tied to an identifiable account, so it isn't linked to your name or email in the first place.

5. Third-party services

Skintrics uses the following third-party services:

• Sign in with Apple (Apple Inc.) — for authentication. Apple's privacy policy applies to this service.
• Apple CloudKit — for the optional Community feature (posts, replies, direct messages) described in Section 3.
• OpenWeatherMap — for current weather data in the log screen. Only your approximate location is sent to retrieve weather. No personal data is transmitted.
• Apple StoreKit — for processing subscription payments. Handled entirely by Apple.
• Superwall — for displaying and managing our subscription paywalls.
• TelemetryDeck — anonymous product analytics, including your onboarding answers as described in Section 1. Not linked to your identity.
• Mailchimp — hosts our marketing mailing list, using the name and email you provide when signing in.
• Meta (Facebook) — ad campaign measurement, gated by Apple's App Tracking Transparency permission. See Section 1.

6. Children's privacy

Skintrics is not directed at children under the age of 13. We do not knowingly collect any information from children.

7. Your rights

Depending on where you live, you may have rights to access, correct or delete personal data we hold about you, or to object to certain processing. Since your daily logs never reach us, most of this applies to your name, email address, and anything you've posted to the Community — contact us using the details in Section 9 and we'll act on it. This section is a plain-language summary, not a substitute for legal advice specific to your jurisdiction.

8. Changes to this policy

If we make material changes to this privacy policy, we will update the date at the top of this page. Continued use of the app after any changes constitutes acceptance of the updated policy.

9. Contact

If you have any questions about this privacy policy, please contact us at hello@skintrics.app.