Privacy Policy

Effective date · 2026-09-05

At Trialist we believe personal health data should remain personal. This app is designed to work entirely on your device using Apple HealthKit and local storage. We do not run accounts or servers, and your health data never leaves your device.

Summary

• No account, no login.
• No cloud. Data is stored locally on your device and in Apple Health (when you opt in).
• No ads, no tracking. We count anonymous feature usage (for example "an experiment was created") with no identifiers and no health values, so we can see which features are worth improving.
• Health data stays on your device. Nothing from Apple Health, your logs, or your results is ever sent anywhere.
• Export anytime. You control your data (PDF reports and JSON exports).

Health data & permissions

Trialist reads and writes health data via Apple HealthKit only with your explicit permission. You can manage permissions at any time in Settings → Health → Data Access & Devices.

• Read (optional): sleep (duration/segments), heart rate, HRV, steps, workouts, and other metrics you approve.
• Write (optional): none by default; if enabled, only the data types you approve.

Information we collect

We do not collect personal data. All app content (experiments, logs, results) is stored on your device. Diagnostic logs are kept locally and are never transmitted unless you choose to share them with us.

Two service providers receive limited, non-personal data so the app can work:

• Purchases. Trialist Pro is sold through Apple's App Store. RevenueCat validates purchases and receives your purchase history under a random, anonymous identifier. It is not linked to your name, email, or health data.
• Usage analytics. We use TelemetryDeck, a privacy-focused, EU-hosted service, to count how often features are used. Each event is a bare name such as "experiment created" or "paywall shown", plus general context such as app version, iOS version, device type, language, country, time zone, and accessibility settings like text size. It carries no health data, no experiment names, no metric values, and no identifier that can be traced back to you. This data is not used for advertising or tracking across apps.

Crash reports & analytics

Trialist includes no advertising SDKs and does not track you across apps or websites. Anonymous feature-usage counts are described above. If you opt in to Apple's system diagnostics, Apple may send us anonymized crash reports. None of these contain health data.

Data export & deletion

You can export data (e.g., JSON, PDF) from within the app. To delete app data, remove it from within the app, revoke Health permissions, and optionally delete the app from your device. Health data written to Apple Health is managed in the Health app.

Children's privacy

Trialist is not intended for children under 13. We do not knowingly collect information from children.

Contact

Questions? Email us at contact@gettrialist.app.