Privacy Policy

MindWhet is designed so your health record stays under your control. Cognitive scores, lifestyle logs, and insights are processed on your iPhone.

Last updated: 18 August 2026

On-device by default

Test results, meals, sleep, fasting, supplements, biomarkers, and generated insights do not leave your iPhone unless you turn on iCloud sync, connect Apple Health, search the USDA food catalog, export a file, or send an email. There is no MindWhet user account and no MindWhet analytics backend for health data.

Who I am

MindWhet is provided by Vitalijs Teze. Questions: [email protected]. This policy applies to the MindWhet iOS app and mindwhet.com.

Information stored on your device

The app stores the following locally (SwiftData and related app files), for app functionality:

  • Cognition: self-reports (focus, energy, mood) and results from memory, Stroop, reaction-time, and task-switching tests; derived daily scores and baseline comparisons
  • Sleep and exercise: manual logs and, if you allow HealthKit, data read from Apple Health
  • Nutrition: meals, templates, and nutrient values you logged (including items looked up via USDA)
  • Fasting: eating windows, timer state, and completed fasts
  • Biomarkers: values you enter (for example ketones, glucose)
  • Supplements: labels and doses you log
  • Goals and practice state: the three goal types (baseline growth, daily challenge, streak), daily quest completion, and related progress
  • Profile and preferences: name and body metrics you enter, units, notification and test-limit settings

Daily scoring uses a 70% objective / 30% subjective blend of that day’s medians when both exist; otherwise a simple average. Principal Component Analysis is not run on your data. Insights use Pearson and Spearman correlations on aligned days; a finding is shown only with enough samples and a minimum strength threshold.

Apple HealthKit (optional)

With your permission, MindWhet may:

  • Read sleep analysis, workouts, and related metrics
  • Read age, sex, height, and weight for energy estimates
  • Write meals and exercise sessions you log in MindWhet back to Apple Health

HealthKit data remains in Apple’s health ecosystem and is also subject to Apple’s privacy policy. You can revoke access in iOS Settings → Privacy & Security → Health → MindWhet, or disable Health sync in Profile.

What leaves the device

USDA FoodData Central

When you search for a food, the search text is sent to the USDA FoodData Central API so the app can show nutrient data. I do not send your identity, meal history, or health record with that request.

iCloud (optional)

If you enable iCloud sync in Profile, encrypted copies may sync through your Apple ID. I cannot read your iCloud contents. You can turn sync off in the app and manage storage in iOS Settings.

Email you send

Profile feedback and mail to [email protected] or [email protected] are messages you choose to send. A feedback draft may include generic device wording to help reproduce bugs. It does not attach your health database. I keep correspondence only as long as needed to reply.

This website

mindwhet.com is a static site. It does not run a MindWhet analytics or advertising SDK. Your host or CDN may see ordinary server logs (IP address, pages requested) as part of delivering the pages.

What I do not do

  • No MindWhet account, sign-in, or advertising identifier
  • No Firebase, Crashlytics, or other third-party crash or product analytics in the iOS app
  • No sale, rent, or trade of personal or health data
  • No cross-app tracking

Notifications

Fasting and reminder notifications are scheduled locally on your device. I do not operate a push server for marketing messages.

How I use on-device information

  • Show Today, Insights, and Profile
  • Compute daily scores, baselines, correlations, and recommendations on the device
  • Honor goals and the daily measure-and-log practice
  • Export files you request

Your control

  • Access: browse your logs and scores in the app
  • Export: Profile → Export data
  • Erase local app data: Profile → Delete local data. This removes MindWhet’s local database. It does not delete Apple Health samples or iCloud data outside the app container
  • Uninstall: removes the app sandbox on that device
  • HealthKit: managed in iOS Settings

More practical steps: Support.

Legal bases and international users

I process data to provide the app you asked for (performance of a service) and, where required, on the basis of your consent (HealthKit, notifications, optional iCloud).

If you are in the European Economic Area or United Kingdom, you may have rights of access, rectification, erasure, restriction, portability, and objection. Export and local delete are the primary tools; email [email protected] if you need help exercising them. You may also lodge a complaint with your supervisory authority.

Because health analysis is local, I do not operate a MindWhet health-data server in another country. USDA, Apple (Health / iCloud), and your email provider process only the limited information described above under their own terms.

Children

MindWhet is intended for people 17 years and older. I do not knowingly collect personal information from children under 17. If you believe a child has used the app, contact [email protected] and I will help delete what I can (local data is on the device).

Disclosure

I may disclose information only if required by law, to protect someone’s safety, or in a transfer of the app’s operation (you would be notified). I do not have a standing feed of your health database to hand over — it lives on your device unless you sent it.

Changes

If this policy changes in a material way, I will update the date above and post the new version at this URL. Continued use after the update means you accept the revised policy.

Contact

I aim to respond to privacy inquiries within 30 days.