# Privacy Policy for ProVocab (고급 영단어)

**Last Updated:** January 24, 2026

## Introduction

ProVocab ("we", "our", or "us") is committed to protecting your privacy. This Privacy Policy explains how we collect, use, disclose, and safeguard your information when you use our mobile application ProVocab (고급 영단어) (the "App").

Please read this privacy policy carefully. If you do not agree with the terms of this privacy policy, please do not access the application.

## Information We Collect

### 1. Automatically Collected Information

When you use the App, we automatically collect certain information about your device and usage patterns:

#### Analytics Data (via Firebase Analytics)
- Device information (model, operating system version, unique device identifiers)
- App usage data (screens viewed, features used, session duration)
- Language preferences
- Premium subscription status
- Actions performed within the app (e.g., viewing word groups, marking words as learned, playing audio)

#### Crash and Performance Data (via Firebase Crashlytics)
- Crash logs and stack traces
- Device state information at the time of crashes
- App performance metrics
- Custom logs related to app errors

#### Advertising Data (via Google AdMob)
- Device advertising ID
- IP address
- Device information
- Ad interaction data
- Location data (coarse location, if permitted)

### 2. Information You Provide

#### Learning Progress Data
- Words you mark as "learned" or "familiar"
- Your progress through vocabulary levels
- Custom study preferences

#### Purchase Information (via In-App Purchases)
- Purchase transaction data (processed by Apple App Store or Google Play Store)
- Premium subscription status
- We do not collect or store your payment information directly

## How We Use Your Information

We use the information we collect to:

1. **Provide and Maintain the App**
   - Track your learning progress
   - Save your vocabulary study history
   - Synchronize your preferences across app sessions

2. **Improve the App**
   - Analyze usage patterns to improve features
   - Identify and fix bugs and crashes
   - Optimize app performance

3. **Personalize Your Experience**
   - Display relevant vocabulary content
   - Remember your language preferences
   - Track your learning statistics

4. **Display Advertisements** (for non-premium users)
   - Show personalized ads via Google AdMob
   - Measure ad performance

5. **Process Purchases**
   - Manage premium subscriptions
   - Restore previous purchases

## Third-Party Services

We use the following third-party services that may collect information:

### Google AdMob
- **Purpose:** Display advertisements in the free version of the app
- **Data Collected:** Device identifiers, ad interaction data, coarse location
- **Privacy Policy:** https://policies.google.com/privacy

### Firebase Analytics
- **Purpose:** Understand app usage and improve user experience
- **Data Collected:** Device information, usage patterns, user actions
- **Privacy Policy:** https://firebase.google.com/support/privacy

### Firebase Crashlytics
- **Purpose:** Monitor app stability and fix crashes
- **Data Collected:** Crash reports, device state, stack traces
- **Privacy Policy:** https://firebase.google.com/support/privacy

### Apple App Store / Google Play Store
- **Purpose:** Process in-app purchases
- **Data Collected:** Purchase transaction data
- **Privacy Policies:**
  - Apple: https://www.apple.com/legal/privacy/
  - Google: https://policies.google.com/privacy

## Data Storage and Security

### Local Storage
- Your learning progress (words marked as learned) is stored locally on your device using SQLite database
- Language preferences are stored locally using SharedPreferences
- This data is not transmitted to our servers

### Cloud Storage
- Analytics data is transmitted to Firebase servers
- Crash reports are transmitted to Firebase Crashlytics
- All data transmission is encrypted using industry-standard HTTPS/TLS protocols

### Data Security
We implement appropriate technical and organizational security measures to protect your information against unauthorized access, alteration, disclosure, or destruction.

## Data Retention

- **Learning Progress:** Stored locally on your device until you delete the app
- **Analytics Data:** Retained by Firebase according to their data retention policies (typically 14 months)
- **Crash Reports:** Retained by Firebase Crashlytics for 90 days
- **Ad Data:** Retained by Google AdMob according to their policies

## Your Privacy Rights

Depending on your location, you may have the following rights:

### General Rights
- **Access:** Request information about the data we collect
- **Deletion:** Request deletion of your data (note: most data is stored locally and deleted when you uninstall the app)
- **Opt-Out of Personalized Ads:** Use device settings to limit ad tracking:
  - **iOS:** Settings > Privacy > Tracking > Turn off "Allow Apps to Request to Track"
  - **Android:** Settings > Google > Ads > Opt out of Ads Personalization

### GDPR Rights (European Users)
If you are in the European Economic Area (EEA), you have additional rights:
- Right to access your personal data
- Right to rectification of inaccurate data
- Right to erasure ("right to be forgotten")
- Right to restrict processing
- Right to data portability
- Right to object to processing
- Right to withdraw consent

### CCPA Rights (California Users)
If you are a California resident, you have the right to:
- Know what personal information is collected
- Know whether personal information is sold or disclosed
- Opt-out of the sale of personal information
- Access your personal information
- Request deletion of personal information
- Non-discrimination for exercising your rights

**Note:** We do not sell your personal information.

## Children's Privacy

Our App is not directed to children under the age of 13 (or 16 in the EEA). We do not knowingly collect personal information from children. If you are a parent or guardian and believe your child has provided us with personal information, please contact us, and we will delete such information.

## Premium Subscription

When you purchase a premium subscription:
- Ads are removed from the app
- Additional features are unlocked (example audio, word management for all groups)
- Your premium status is stored locally and verified through App Store/Play Store
- We do not collect or store your payment information

## International Data Transfers

Your information may be transferred to and processed in countries other than your country of residence. These countries may have data protection laws that are different from the laws of your country.

We ensure appropriate safeguards are in place to protect your information in accordance with this Privacy Policy.

## Changes to This Privacy Policy

We may update this Privacy Policy from time to time. We will notify you of any changes by:
- Updating the "Last Updated" date at the top of this policy
- Displaying a notice in the app (for material changes)

You are advised to review this Privacy Policy periodically for any changes.

## Contact Us

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

**Email:** hello.prseo7@gmail.com
**App:** ProVocab (고급 영단어)
**Developer:** PrSeo7

## Consent

By using our App, you consent to our Privacy Policy and agree to its terms.

## Data Collection Summary for App Store/Play Store

### Data Used to Track You
- **Identifiers:** Device ID, Advertising ID (for personalized ads)
- **Usage Data:** Product interaction, advertising data

### Data Linked to You
- **Usage Data:** App interactions, word progress (stored locally)
- **Identifiers:** Device ID (for analytics)
- **Purchases:** In-app purchase history

### Data Not Linked to You
- **Diagnostics:** Crash logs, performance data
- **Usage Data:** Anonymous analytics

## Specific Feature Data Collection

### AdMob (Non-Premium Users Only)
- **Collects:** Device identifiers, ad interaction data, approximate location
- **Purpose:** Display relevant ads
- **Opt-out:** Purchase premium or use device ad tracking settings

### Firebase Analytics
- **Collects:** App usage events, screen views, user actions
- **Purpose:** Improve app performance and user experience
- **Opt-out:** Cannot be fully disabled but data is anonymous

### Firebase Crashlytics
- **Collects:** Crash reports, device state, app logs
- **Purpose:** Fix bugs and improve app stability
- **Opt-out:** Data collection is automatic for app stability

### In-App Purchases
- **Collects:** Purchase transaction data (via App Store/Play Store)
- **Purpose:** Manage premium features
- **Storage:** Verified through platform receipts

## Your Choices

1. **Limit Ad Tracking:** Use iOS/Android settings to opt-out of personalized ads
2. **Delete Data:** Uninstall the app to remove all locally stored data
3. **Premium Subscription:** Purchase premium to remove ads
4. **Contact Us:** Request data deletion or access by contacting us

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**This privacy policy is effective as of January 24, 2026.**