Tendwick — Family Medicines & Health Records

Privacy Policy

Tendwick · Developer and operator: Daniil Sudarev · Last updated: November 15, 2026

Tendwick ("the app") helps you keep the family's medicines, dose reminders, lab results, vaccines, symptoms and an emergency card in one place. It has no account, no server and no internet connection of its own — the Android version does not even request internet access. No personal or health data leaves your device unless you send a file yourself. We never sell or share data, and the app is free with no purchases.

1. Your data stays on your phone

People, medicines, schedules, dose history, records and attachments are stored only in the app's private storage on your device, which is protected by the operating system. We have no copy and cannot see them. Deleting the app deletes the data. You can turn on an app lock with Face ID, Touch ID, fingerprint or the device passcode; biometric checks are done by the system and the app never receives your biometric data.

2. Camera, photos and files

The camera is used only when you photograph a lab report or prescription yourself. From the gallery and Files the app receives only the pictures or PDFs you pick. The app asks to add a picture to your photo library only when you save the emergency card there. Text and values on lab reports are recognised on the phone (Apple Vision on iOS, Google ML Kit on Android); pictures and recognised text are never sent anywhere.

3. Reminders and widget

Dose and low-stock reminders are local notifications scheduled on your phone; no server is involved. The home-screen widget shows only the number of doses and the next time — no names or medicines, because other people can see your home screen.

4. Emergency card, PDF for the doctor and backups

The emergency card (picture) and the PDF for the doctor are created on the phone and go only where you send, print or save them. A backup is a file encrypted with a password you choose (PBKDF2 + AES-256-GCM); you decide where to keep it. We do not receive these files and cannot open a backup without your password.

5. Sharing with Docwick by Sudarev

If you also use Docwick by Sudarev, you can exchange the family list (names, dates of birth, child mark) and document expiry dates between the two apps. On iPhone this goes through a shared folder of the two apps on the same device (App Group); otherwise through a file you export and import yourself. Medicines and health records are never shared. No server is involved.

6. Deleting your data

Settings → Delete all data removes everything the app stores on the device at once. There is no account, so there is nothing to delete on our side. Backup files you saved elsewhere are deleted by you.

7. No purchases, ads, analytics or tracking

The app is free and has no in-app purchases. It has no advertising, analytics, crash reporting, trackers or third-party SDKs that collect data, and does not use the advertising ID. The microphone, contacts, calendar and location are not used. Data is not used for any other purpose and is not shared with health services or insurers.

8. Not medical advice

Tendwick is a diary and a reminder. It does not diagnose, recommend treatment or replace a doctor. Normal ranges are for reference; always follow your doctor's advice.

9. Children

The app collects no data from anyone. Parents may keep their children's medicines and records on their own phone.

10. Changes and contact

If this policy changes, the new version will be published on this page. Contact: support@sudarev.app.