Privacy Policy

Effective date: April 28, 2026

Introduction

Proofwise ("we", "our", or "the app") is a personal health experimentation app that helps you run N=1 supplement experiments using your own biomarker data. We are committed to protecting your privacy and giving you full control over your health information. This policy explains what data we collect, how we use it, and how we protect it.

Medical Disclaimer

Proofwise is a personal self-experimentation tool designed to help you track supplement routines and analyze your own biomarker data. It is not a medical device and is not intended to diagnose, treat, cure, or prevent any disease or health condition.

The statistical results, effect sizes, confidence levels, and other analyses provided by Proofwise are for informational and educational purposes only. They reflect patterns in your personal data and should not be interpreted as medical advice, clinical evidence, or a substitute for professional healthcare guidance.

Always consult a qualified healthcare provider before starting, stopping, or changing any supplement, medication, or health regimen. Do not disregard professional medical advice or delay seeking it because of information presented in this app.

Data Collection

Proofwise is designed as a local-first application. Your personal health data is stored on your device and under your control. Here is what the app handles:

  • Experiment data — Experiments you create, interventions you log, supplement names, dosages, and timing. Stored locally on your device.
  • Biomarker observations — Health metrics you track, including manually entered observations and data read from Apple Health. Stored locally on your device.
  • Barcode scans — Barcode scanning for blinded experiments is processed on your device. No barcode is sent off the device in the current version.
  • Usage analytics — Production builds send privacy-preserving product interaction events to TelemetryDeck, such as onboarding completion, experiment creation, settings views, export format, duration days, and metric count.
  • Diagnostics — Production builds can send crash reports and technical diagnostic breadcrumbs to Sentry so we can fix stability issues.
  • Email address — Only if you voluntarily joined our pre-launch waitlist. Collected via Formspree and used solely to notify you about app availability.

TelemetryDeck and Sentry do not receive HealthKit samples, biomarker values, supplement names, template names, barcodes, notes, photos, or exported files from Proofwise. We do not use advertising identifiers or collect data for third-party marketing.

Apple HealthKit Usage

Proofwise integrates with Apple HealthKit to read health data you explicitly authorize, such as sleep analysis, heart rate variability (HRV), resting heart rate, blood oxygen saturation, and other biomarkers.

  • We only read HealthKit data types you grant permission for. We never write data to HealthKit.
  • HealthKit data is used exclusively within the app to power your experiments and statistical analysis.
  • HealthKit data is never sold, shared with third parties, used for advertising, sent to analytics/diagnostics providers, or transmitted to external servers.
  • You can revoke HealthKit access at any time via iOS Settings > Privacy & Security > Health > Proofwise.

Analytics and Diagnostics

Proofwise uses limited analytics and diagnostics in production builds to understand app reliability and feature usage without collecting your health records.

  • TelemetryDeck receives product interaction events and limited non-health metadata, such as duration days, metric count, settings toggles, and export format.
  • Sentry receives crash reports and technical diagnostic breadcrumbs. We configure Sentry to avoid screenshots, view hierarchy capture, automatic PII, automatic session tracking, and network tracing.
  • Analytics and diagnostics are not used for advertising or tracking across other apps and websites.

Barcode Lookup

When you choose to scan a supplement barcode for template matching, Proofwise sends that barcode to Open Food Facts at world.openfoodfacts.org and receives product details such as product name, brand, quantity, serving size, ingredients, and categories. This lookup is only triggered when you scan a barcode.

Local-First Storage

Proofwise follows a local-first architecture. This means:

  • All your data is stored on-device using Apple's SwiftData framework.
  • The app works fully offline — no internet connection is required to create experiments, log interventions, or view your analysis.
  • We do not operate backend servers that store your personal or health data.
  • If you delete the app, your local data is removed from that device.

Data Sharing & Third Parties

We do not sell or rent your personal or health data. Specifically:

  • No advertising SDKs or tracking pixels are included in the app.
  • No analytics or diagnostics services receive your HealthKit samples, biomarker values, notes, barcodes, or exported files.
  • TelemetryDeck receives limited product interaction analytics.
  • Sentry receives crash and stability diagnostics.
  • Open Food Facts receives a scanned barcode only when you use barcode lookup.
  • Formspree processes pre-launch waitlist email signups on our website.

Data Security

Your local data is protected by the security measures built into iOS:

  • On-device data is protected by iOS Data Protection and your device passcode.
  • HealthKit data is encrypted on-device and governed by Apple's HealthKit privacy framework.

Children's Privacy

Proofwise is not intended for use by children under 13. We do not knowingly collect personal information from children under 13. If you believe a child has provided us with personal data, please contact us so we can take appropriate action.

Your Rights

Because Proofwise is local-first, you have full control over your data at all times:

  • Access & export — Your data lives on your device. You can view it at any time within the app.
  • Deletion — Delete individual experiments or all data from within the app. Uninstalling the app removes all local data.
  • HealthKit permissions — Manage which health data Proofwise can read via iOS Settings.

If you are located in the European Economic Area (GDPR) or California (CCPA/CPRA), you have additional rights including data access, erasure, portability, and the right to opt out of data sales. Because Proofwise is local-first and does not store your personal health data on our servers or sell your data, your personal health data stays on your device. For any data rights requests, contact Proofwise — the independent developer that operates this app and acts as the data controller — at proofwise.app@gmail.com.

Changes to This Policy

We may update this privacy policy from time to time. If we make material changes, we will notify you through the app or on our website. The "Effective date" at the top of this page indicates when the policy was last revised.

Contact Us

If you have questions about this privacy policy or your data, please reach out at proofwise.app@gmail.com.