Your health data
belongs to you.

1 Our Commitment

At Serum, privacy isn't a checkbox — it's a design decision made before the first line of code was written. We built Serum to give people meaningful insight into their own health data, and we believe that mission is only possible if users can trust us completely with their most sensitive information.

This Privacy Policy explains what data Serum handles, how it is handled, and the technical and philosophical commitments we've made to protect your privacy.

2 What Data Serum Uses

Serum is a personal health data app. The information it works with includes:

• Blood test results and biomarker values you import or enter manually
• Lab report images captured with your camera or imported from your photo library
• Health data you choose to sync from Apple Health (e.g. blood pressure, glucose, heart rate)
• Custom notes, protocol preferences, and reminder settings you configure

None of this data ever leaves your device. It is stored locally using Apple's SwiftData framework in the app's private, sandboxed container — inaccessible to any other app or service without your explicit permission.

3 What We Do Not Collect

To be explicit:

• We do not operate servers that store your health data
• We do not use analytics tools that track how you use the app
• We do not collect advertising identifiers or build behavioural profiles
• We do not sell, license, or share your data with any third party — ever
• We do not use your data to train AI or machine learning models
• We do not have the ability to access your data even if compelled to do so, because we simply do not have it

4 Camera & Photo Library

Serum requests access to your camera and photo library solely to enable lab report import. When you photograph a lab result, that image is processed entirely on your device using on-device AI. The image is used to extract your biomarker values and is then discarded — it is not stored in the app, uploaded anywhere, or retained in any form after processing.

You will always be asked for permission before Serum accesses your camera or photos. You can revoke this permission at any time in iOS Settings.

5 Apple Health Integration

Serum can read data from Apple Health — such as blood glucose readings from a CGM, blood pressure from a connected device, or heart rate from Apple Watch — to display alongside your lab results. This integration is entirely optional.

Any Apple Health data displayed in Serum remains subject to Apple's own privacy framework and is never transmitted outside your device by Serum. We only read the data types you explicitly approve, and you can disconnect Serum from Apple Health at any time via iOS Settings → Privacy & Security → Health.

6 Subscriptions & Payments

Serum offers optional premium features through an auto-renewable subscription managed entirely by Apple via the App Store. All payment processing, billing information, and transaction records are handled by Apple — Serum never sees, stores, or processes your payment details. Apple's privacy policy governs all transaction data.

7 iCloud Backup

If you have iCloud Backup enabled on your device, your Serum data may be included in your personal iCloud backup as part of your device backup. This backup is encrypted end-to-end and accessible only to you via your Apple ID. Serum has no involvement in or access to your iCloud account or backups. You can exclude Serum from iCloud Backup at any time in iOS Settings → [your name] → iCloud → Manage Storage.

8 Serum is for Adults (18+)

Serum is designed exclusively for adults aged 18 and over. The biomarker reference ranges, optimal zones, health scores, and clinical context provided within the app are based on peer-reviewed research conducted on adult populations. Applying this data to children or adolescents would be inappropriate and potentially misleading — and is not something Serum is designed to support.

If you are under 18, please do not use Serum. If you are a parent or guardian and believe someone under 18 has accessed the app, we encourage you to remove it from their device.

9 Changes to This Policy

If we ever update this Privacy Policy, the revised version will be published at this URL with an updated effective date. We will not make changes that compromise the core privacy commitments described here — specifically, your health data will always remain on your device and under your control. If we ever face a situation where that commitment cannot be maintained, we will communicate it clearly and directly before any change takes effect.

10 Your Rights

Because Serum does not collect or store your personal data, there is nothing for us to provide, correct, or delete on your behalf. You are already in complete control of your data. To delete your Serum data entirely, simply delete the app from your device — all locally stored data will be permanently removed.

If you have questions about your rights under applicable privacy regulations (including GDPR, CCPA, or others), or if you believe we have not honoured this policy, please reach out. We take every inquiry seriously.