Kidney Stone Tracker

# Privacy Policy for Kidney Stone Tracker

**Effective Date:** June 24, 2026

**Developer:** Muhammad Ilyas (Mobilia Apps)

**Contact:** muhammadilyas15@gmail.com

## 1. Introduction

Kidney Stone Tracker ("we", "our", "the app") is an offline, informational health-logging app that helps you track hydration, dietary oxalate intake, urine pH readings, and your kidney-stone history. This Privacy Policy explains how we collect, use, store, and protect your information when you use our mobile application.

By using Kidney Stone Tracker, you agree to the collection and use of information as described in this policy.

**Privacy by design:** Kidney Stone Tracker does not require an account, does not sign you in, and does not sync your data to any server. All of the health information you enter stays on your device.

## 2. Information We Collect

### 2.1 Information You Provide (stored only on your device)

You may enter the following information, which is saved locally in an on-device database and is never transmitted to us or to any third party:

- **Hydration logs** — water/fluid amounts and timestamps

- **Dietary oxalate logs** — foods you select from the built-in database, serving sizes, and oxalate totals

- **Urine pH readings** — pH values you record and their dates

- **Kidney-stone episodes** — date, side, stone composition, pain level, treatment, and any notes you add

- **App preferences** — daily water goal, fluid unit (ml/oz), pH target band, reminder settings, and theme

We do **not** collect your name, email address, phone number, date of birth, or any account identifier. The app has no login.

### 2.2 Information Collected Automatically

We do not operate our own analytics or crash-reporting servers, and the app contains no Firebase Analytics or Crashlytics. However, the third-party advertising service we use (Google AdMob) may automatically collect:

- **Advertising identifier** (Android Advertising ID)

- **Approximate (coarse) location** — inferred by the ad SDK, typically from your IP address; the app itself does **not** request or use any device location permission

- **Ad interaction and general device data** used to serve and measure advertisements

### 2.3 Information from Third-Party Services

The app does not use Google Sign-In or any social login, so no profile data (email, name, photo) is collected from third-party sign-in providers.

## 3. How We Use Your Information

We use information to:

- Provide core app functionality — hydration tracking, oxalate budgeting, urine pH trends, and stone-episode history (all processed locally on your device)

- Generate on-device charts and a doctor-ready PDF summary that you choose to export and share

- Send optional hydration reminder notifications that you enable

- Display advertisements to users on the free tier (via Google AdMob)

- Process one-time Premium purchases (via Google Play Billing)

Your health logs are used **only** to power features inside the app on your device. They are never sent to us and are never used for advertising.

## 4. Data Storage and Security

### 4.1 Local Storage

- All your data (hydration, food, urine pH, stone episodes, and preferences) is stored locally on your device in a private app database (Room) and in local app preferences.

- Exported PDF summaries are written to the app's private storage and shared only when you explicitly choose to share them.

- Because data is stored on-device and is not synced, it is only as secure as your device. We recommend using a device lock screen.

### 4.2 Cloud Storage

- Kidney Stone Tracker does **not** use cloud storage, cloud backup, or server-side sync. There is no user account and no remote copy of your health data.

### 4.3 Security Measures

- Any network communication made by third-party SDKs (advertising, billing) uses HTTPS/TLS encryption.

- Premium purchases are handled entirely by Google Play Billing; we never see or store your payment details.

## 5. Data Sharing

### 5.1 We Do NOT Sell Your Data

We do not sell, trade, or rent your personal information to third parties. We have no access to your health logs and therefore cannot share them.

### 5.2 Third-Party Services

We use the following third-party services, which may collect limited data as described:

|---------|---------|--------------|----------------|

The app does **not** include Firebase Authentication, Firebase Firestore, Firebase Analytics, or Firebase Crashlytics.

### 5.3 Ad Personalization

- Free-tier users see advertisements served by Google AdMob.

- AdMob may use device identifiers and the data above for ad personalization.

- On first launch we use Google's User Messaging Platform (UMP) to request your consent for data processing and personalized advertising where required.

- You can opt out of personalized ads through your device settings (Settings > Google > Ads).

- Premium (one-time purchase) users see no advertisements.

## 6. Health Data

### 6.1 Health Information

Kidney Stone Tracker stores health-related information that you choose to enter, including:

- Hydration / fluid intake logs

- Dietary oxalate intake logs

- Urine pH readings

- Kidney-stone episode records (date, side, composition, pain level, treatment, notes)

### 6.2 Health Data Protection

- Your health data is stored **locally on your device only**. It is never uploaded, synced, or transmitted to us or to any server.

- Health data is **never** shared with advertisers, ad networks, or marketing partners.

- We do **not** use your health data for advertising or any commercial purpose.

- Health data leaves your device only if you personally export a PDF/report and choose to share it (for example, with your doctor) through another app you select.

### 6.3 Medical Disclaimer

Kidney Stone Tracker is a personal, informational logging tool and is **NOT** a medical device, diagnostic tool, or source of medical advice. It does not diagnose, treat, cure, or prevent kidney stones or any other condition. Oxalate values and pH ranges shown are published reference figures for general information only. Always consult your urologist or doctor for medical decisions. Never delay seeking professional care because of something you read in this app.

## 7. Children's Privacy

Kidney Stone Tracker is not directed at children under the age of 13. We do not knowingly collect personal information from children under 13. If you believe a child has provided us with personal information, please contact us and we will address it promptly.

## 8. Your Rights and Choices

### 8.1 Access and Control

- You can view all of your data within the app at any time.

- You can edit or delete any entry you have added.

- You can export your data as a PDF report for your own records.

### 8.2 Data Deletion

- Because all data is stored locally, you can delete individual entries inside the app at any time.

- Uninstalling the app permanently removes all locally stored data from your device.

- There is no cloud copy of your data to request deletion of; if you have other questions, email us at muhammadilyas15@gmail.com.

### 8.3 Notifications

- Hydration reminders are optional. You can disable them at any time in the app's Settings or in your device notification settings.

### 8.4 Ad Preferences

- A one-time Premium purchase removes all advertisements.

- You can opt out of personalized ads via your device settings (Settings > Google > Ads).

## 9. GDPR Compliance (European Users)

If you are located in the European Economic Area (EEA), you have rights including:

- **Right to access** — your data is fully visible and exportable within the app

- **Right to rectification** — edit any entry directly

- **Right to erasure** — delete entries or uninstall the app to remove all local data

- **Right to restrict / object** — disable ads (via Premium) and personalized ads (via device settings)

- **Right to data portability** — export your data as a PDF report

The app uses Google's User Messaging Platform (UMP) to obtain consent for data processing and personalized advertising in compliance with GDPR. To exercise any of these rights, contact us at muhammadilyas15@gmail.com.

## 10. Data Retention

- Local data is retained on your device until you delete it or uninstall the app.

- We do not retain any copy of your health data, because it is never transmitted to us.

- Advertising data handled by Google AdMob is retained per Google's standard policies.

## 11. Changes to This Policy

We may update this Privacy Policy from time to time. We will notify you of significant changes by updating the "Effective Date" above and posting the revised policy at its hosted URL. Your continued use of the app after changes constitutes acceptance of the updated policy.

## 12. Contact Us

If you have questions or concerns about this Privacy Policy or our data practices, contact us at:

**Email:** muhammadilyas15@gmail.com

**Developer:** Muhammad Ilyas (Mobilia Apps)

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_This policy will be published at: https://sites.google.com/view/mobilia-apps/kidney-stone-tracker_

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