# Privacy Policy — Stop Smoking Tracker
**Last updated: May 27, 2026**
This Privacy Policy explains how Stop Smoking Tracker ("the App", "we", "us", or "our") collects, uses, and protects information when you use our mobile application. By using the App, you agree to the practices described in this policy.
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## 1. Who We Are
Stop Smoking Tracker is developed and operated by Panagiotis Karagiannis. If you have any questions about this policy, you can contact us at:
**Email:** panoskaragiannhs@gmail.com
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## 2. Information We Collect
### 2.1 Information You Provide Directly
When you set up the App, you enter personal health and lifestyle information to personalise your quit journey. This includes:
- Number of cigarettes smoked per day
- Daily spending on cigarettes
- Your primary reason for quitting
- Your quit-journey stage (e.g. ready to quit today, cutting down first)
- Preferred daily reminder time
- Whether you opt in to anonymous analytics
**This information is stored only on your device.** It is not transmitted to our servers.
### 2.2 Information Collected Automatically
**Device identifiers and purchase data** — When you make or restore an in-app purchase, our payment processor RevenueCat processes the transaction. RevenueCat may collect your device identifier (e.g. IDFA on iOS, advertising ID on Android), purchase history, and subscription status. This information is processed under RevenueCat's own privacy policy (see Section 5).
**Notification permissions** — If you grant notification permission, the App schedules daily local reminders on your device. No notification content is transmitted to external servers; reminders are generated and delivered entirely on-device.
**Crash and diagnostic data** — The operating system (Android/iOS) may automatically collect crash reports and send them to the platform provider (Google/Apple) under their respective privacy policies. We do not receive personally identifiable information from these reports.
### 2.3 Analytics (Optional, Opt-In Only)
During onboarding, you are given the option to share anonymous usage analytics. If you opt in:
- We collect aggregated, non-identifiable data about how features are used (e.g. which onboarding steps are completed, feature interaction frequency).
- This data cannot be used to identify you personally.
- You can withdraw this consent at any time by contacting us or reinstalling the App and declining analytics during setup.
If you do not opt in, no analytics data is collected.
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## 3. How We Use Your Information
| Purpose | Data Used | Legal Basis |
|---|---|---|
| Delivering the App's core features (progress tracking, streak calculation, savings estimates) | Health/lifestyle data you entered | Contract performance |
| Sending daily reminders you have configured | Reminder time preference | Contract performance |
| Processing in-app purchases and restoring entitlements | Purchase data (via RevenueCat) | Contract performance |
| Improving the App with aggregate insights | Anonymous analytics (opt-in only) | Consent |
| Responding to support requests | Your email address | Legitimate interest |
We do not use your information for advertising, behavioural profiling, or selling to third parties.
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## 4. Data Storage and Retention
- **On-device data** (your quit profile, progress, preferences) is stored in your device's local storage and is never uploaded to our servers. It persists until you uninstall the App or clear the App's data.
- **Purchase data** held by RevenueCat is retained according to RevenueCat's data retention policy.
- **Anonymous analytics** (if you opted in) are retained in aggregated form indefinitely for product improvement purposes. No individual record is kept.
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## 5. Third-Party Services
The App uses the following third-party services. Each operates under its own privacy policy:
### RevenueCat
Manages in-app subscriptions and one-time purchases.
- **Data collected:** Device identifiers, purchase history, subscription status.
- **Privacy policy:** https://www.revenuecat.com/privacy
### Google Play Services / Apple App Store
Facilitate app distribution, crash reporting, and purchase verification.
- **Google Privacy Policy:** https://policies.google.com/privacy
- **Apple Privacy Policy:** https://www.apple.com/legal/privacy
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## 6. Data Sharing
We do not sell, rent, or trade your personal information. We share data only in the following limited circumstances:
- **With RevenueCat**, as described above, solely to process your purchases.
- **When required by law**, if we receive a valid legal request from a court or government authority.
- **In a business transfer**, if the App is acquired or merged with another entity, under the condition that the acquiring party agrees to honour this Privacy Policy.
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## 7. Your Rights
Depending on your location, you may have the following rights regarding your personal data:
### All Users
- **Access** — You can view all data the App holds about you directly within the App.
- **Deletion** — You can delete all on-device data by clearing the App's storage (Android: Settings → Apps → Stop Smoking Tracker → Clear Data) or uninstalling the App.
- **Correction** — You can update your quit profile at any time within the App settings.
- **Withdraw analytics consent** — Contact us at panoskaragiannhs@gmail.com and we will remove any analytics association with your installation.
### European Economic Area (EEA) and UK Users — GDPR Rights
In addition to the above, you have the right to:
- **Object** to processing based on legitimate interests.
- **Portability** — Request a copy of data we hold about you in a machine-readable format.
- **Lodge a complaint** with your local data protection authority (e.g. the Hellenic Data Protection Authority at www.dpa.gr).
### California Users — CCPA Rights
California residents have the right to:
- Know what personal information is collected and how it is used.
- Request deletion of personal information.
- Opt out of the sale of personal information. **We do not sell personal information.**
- Non-discrimination for exercising these rights.
To exercise any of these rights, contact us at **panoskaragiannhs@gmail.com**. We will respond within 30 days.
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## 8. Children's Privacy
Stop Smoking Tracker is intended for adults aged **18 and over**. We do not knowingly collect personal information from children under 13 (or under 16 in the EEA). If you believe a child has provided us with personal information, please contact us immediately and we will delete it.
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## 9. Data Security
We take reasonable technical measures to protect the information processed by the App:
- All data is stored locally on your device and protected by your device's own security mechanisms (encryption, screen lock, etc.).
- Purchase transactions are handled end-to-end by RevenueCat and the App Store / Google Play, which use industry-standard TLS encryption.
- We do not operate servers that store your quit-journey data, which means there is no central database to breach.
No method of electronic storage is 100% secure. While we strive to use commercially acceptable means to protect your data, we cannot guarantee absolute security.
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## 10. International Data Transfers
If you are located in the EEA, UK, or another jurisdiction with data transfer restrictions, please note:
- Your on-device data does not leave your device.
- Purchase and analytics data may be processed by RevenueCat and other providers in the United States. RevenueCat participates in the EU-U.S. Data Privacy Framework and applies standard contractual clauses where required.
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## 11. Links to Other Services
The App may display links to external websites (e.g. support pages). We are not responsible for the privacy practices of those sites and encourage you to read their privacy policies.
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## 12. Changes to This Policy
We may update this Privacy Policy from time to time. When we do:
- The "Last updated" date at the top will be revised.
- If the changes are material, we will notify you via an in-app notice or other reasonable means.
Continued use of the App after changes take effect constitutes your acceptance of the revised policy.
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## 13. Contact Us
For any privacy-related questions, requests, or complaints, please contact:
**Stop Smoking Tracker**
**Email:** panoskaragiannhs@gmail.com
We aim to respond to all inquiries within **30 days**.
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*Stop Smoking Tracker is committed to helping you build a healthier future. Your data exists to serve your journey — nothing else.*
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