Terms of Use

Last updated: 15 July 2026

These terms are the agreement between you and Proof28 when you use the app. We've kept them as human-readable as we can — but they do matter, so please read them.

1. Acceptance of these terms

By downloading, installing or using Proof28, you agree to these Terms of Use and our Privacy Policy. If you do not agree, please do not use the app.

2. What Proof28 is

Proof28 is a skincare photo-tracking app. It helps you take consistent daily photos over a 28-day cycle and uses AI visual analysis to describe visible changes between the photos you choose to compare. It exists for informational and personal-tracking purposes only.

3. Not medical advice

4. Your account

You must provide accurate information when creating an account, and you're responsible for keeping your login credentials secure. One account per person. You must be at least 17 years old to use Proof28.

5. Subscriptions and billing

• Proof28 offers a free tier and a paid Premium subscription, billed monthly or annually. The exact features and prices are always shown in the app before you buy, including the full amount you will be billed.
• All subscriptions are processed by Apple through your App Store account. Proof28 never sees or stores your payment details.
• Subscriptions auto-renew unless cancelled at least 24 hours before the end of the current period. Any free trial converts to a paid subscription at the end of the trial unless cancelled before it ends — we will always tell you the trial length and the price you'll be charged before you start.
• To cancel: open Settings on your iPhone → your name → Subscriptions → Proof28. Deleting the app does not cancel a subscription.
• Subscription fees are non-refundable except where required by applicable law or Apple's refund policies. Refund requests are handled by Apple at reportaproblem.apple.com.

6. Your photos and content

• You own your photos. You retain full ownership of every photo you take in Proof28 and anything you create with them.
• By using an AI analysis feature, you consent to the photo(s) involved being transmitted securely to our AI provider (Anthropic) for visual processing, as described in our Privacy Policy. Photos are not stored on Proof28's servers.
• You must only photograph yourself. Do not upload photos of anyone else.

7. Acceptable use

You agree not to:

• misuse, disrupt or attempt to gain unauthorised access to the app or its systems;
• reverse engineer, decompile or copy any part of the app;
• use the app for any unlawful purpose;
• upload photos of anyone other than yourself;
• attempt to circumvent subscription payments or usage limits.

8. Intellectual property

The Proof28 name, logo, design and all content within the app (other than your own photos and content) are owned by Proof28. You may not copy, reproduce or distribute any part of the app without written permission.

9. Limitation of liability

Proof28 is provided on an "as is" and "as available" basis. To the maximum extent permitted by law, we are not liable for: any skin reactions or conditions; any decisions you make based on AI analysis results; loss of data; or any indirect or consequential losses arising from your use of the app. Nothing in these terms limits liability that cannot be limited under the law of England and Wales, including liability for death or personal injury caused by negligence, or your statutory rights as a consumer.

10. Governing law

These terms are governed by the laws of England and Wales. Any disputes will be subject to the exclusive jurisdiction of the courts of England and Wales — although if you live elsewhere in the UK, you may also bring proceedings in your home nation's courts where consumer law gives you that right.

11. Changes to these terms

We may update these terms from time to time. If we make material changes we'll notify you in the app or by email. Continued use of the app after changes take effect means you accept the updated terms.

12. Contact

Questions about these terms? Email support@proof28.com.