Privacy Policy
Last updated: August 5, 2025
1. Introduction
Korutech.io ("we," "our," or "us") operates the Quick Currency Converter mobile application (the "Service"). This Privacy Policy explains how we collect, use, disclose, and safeguard your information when you use our Service.
GDPR Compliance Notice: This app is designed with privacy by design principles and complies with the General Data Protection Regulation (GDPR). We collect only the minimum data necessary for app functionality and provide you with full control over your personal data.
2. Information We Collect
2.1 Information You Provide
- App Preferences: Currency list, base currency selection, and theme preferences
- Rating Interactions: Your responses to app rating prompts (locally stored)
2.2 Automatically Collected Information
- Unique App Identifier: A randomly generated UUID stored locally on your device
- Device Information: Operating system name and version (optional)
- Usage Analytics: Anonymous app usage patterns and feature interactions
- App Performance Data: Crash reports and performance metrics (anonymous)
2.3 Crash and Performance Data
We collect crash reports and performance data to improve app stability and user experience:
- Error logs and stack traces when the app crashes or encounters errors
- Performance metrics (app startup time, screen load times, memory usage)
- Device information (operating system version, device model, app version)
- Anonymous user actions leading to crashes (breadcrumb trail)
- Network request failures and API errors
This data is collected automatically and is essential for maintaining app functionality and user experience.
2.4 Third-Party Data Collection
- Google Mobile Ads (Free Version Only): For displaying advertisements in the free version
- Google Analytics 4: Anonymous usage analytics for app improvement
- Sentry: Crash reporting and performance monitoring for app stability
- App Store/Play Store: Purchase receipts for premium subscription verification
- RevenueCat: In-app purchase management and subscription status
Premium Subscription Privacy: Premium subscribers experience zero ad tracking and minimal data collection. No advertising identifiers are collected or shared for premium users.
3. How We Use Your Information
We use the collected information for the following purposes:
- Providing and maintaining the currency conversion service
- Synchronizing your preferences across app sessions
- Verifying premium subscription status
- Improving app performance and user experience through analytics
- Displaying relevant advertisements (free version only)
- Complying with legal obligations
3.1 Premium vs Free Version Data Usage
- Premium Users: Only essential app functionality data is processed. No advertising data collection or tracking.
- Free Users: Basic analytics and advertising data may be collected to support the free service and show relevant ads.
4. Data Sharing and Disclosure
4.1 We DO NOT sell your personal data to third parties.
4.2 We may share information with:
- Service Providers: RevenueCat (payment processing), Google Mobile Ads (advertising), Sentry (crash reporting)
- Legal Requirements: When required by law or to protect our rights
- Business Transfers: In case of merger, acquisition, or asset sale
5. Your Rights Under GDPR
If you are located in the European Economic Area (EEA), you have the following rights:
- Right to Access: Request copies of your personal data
- Right to Rectification: Request correction of inaccurate data
- Right to Erasure: Request deletion of your personal data
- Right to Restrict Processing: Request limitation of data processing
- Right to Data Portability: Request transfer of your data
- Right to Object: Object to data processing based on legitimate interests
- Right to Withdraw Consent: Withdraw consent for data processing
6. Data Retention
- App Preferences: Retained until you delete the app or clear app data
- Analytics Data: Anonymized and retained for up to 24 months
- Crash and Performance Data: Automatically deleted after 90 days
- Purchase Records: Retained as required by law and app store policies
- Local Storage: You can clear all local data through the app settings
7. Data Security
We implement appropriate technical and organizational measures to protect your personal data:
- Data encryption in transit and at rest
- Access controls and authentication
- Regular security assessments
- Minimal data collection principles
8. International Data Transfers
Your data may be transferred to and processed in countries outside your country of residence. We ensure appropriate safeguards are in place for such transfers, including:
- Standard Contractual Clauses (SCCs)
- Adequacy decisions by the European Commission
- Other legally recognized transfer mechanisms
9. Children's Privacy
Our Service is not intended for children under 13 years of age. We do not knowingly collect personal information from children under 13. If you are a parent or guardian and believe your child has provided us with personal information, please contact us immediately.
10. Third-Party Services
10.1 Google Mobile Ads (Free Version Only)
We use Google Mobile Ads to display advertisements in the free version of our app. Google may collect and use data as described in their privacy policy. You can opt out of personalized advertising by visiting Google's Ad Settings. Premium subscribers do not see ads and are not subject to any advertising data collection.
10.2 Google Analytics 4
We use Google Analytics 4 to understand app usage patterns and improve user experience. This data is anonymized and aggregated. Premium and free users may be included in anonymized analytics data.
10.3 Sentry (Crash Reporting)
We use Sentry for crash reporting and performance monitoring to improve app stability and user experience:
- Purpose: App stability monitoring and bug fixing
- Data collected: Error logs, device information, app performance metrics, anonymous breadcrumb trails
- Privacy Policy: https://sentry.io/privacy/
- Data retention: 90 days (automatically deleted)
- Location: Data processed in the United States
- Legal basis: Legitimate interest for maintaining app functionality
Note: No personal identifying information is included in crash reports. All data is anonymized and used solely for debugging purposes.
10.4 RevenueCat
We use RevenueCat for in-app purchase management. RevenueCat processes purchase data according to their privacy policy.
10.5 Exchange Rate API
We use ExchangeRate-API.com to fetch current currency rates. This service does not receive any personal user data.
11. Data Controller and Processor
Korutech.io acts as the data controller for the personal data collected through the Quick Currency Converter app. For third-party services, we act as a data processor, and those services act as data controllers for their respective data collection.
12. Changes to This Privacy Policy
We may update this Privacy Policy from time to time. We will notify you of any changes by posting the new Privacy Policy in the app and updating the "Last updated" date. Changes are effective immediately upon posting.
13. Contact Information
14. Legal Basis for Processing (GDPR)
Our legal basis for processing personal data includes:
- Legitimate Interest: App functionality, performance improvement, security, and crash reporting for app stability
- Contract Performance: Providing the currency conversion service
- Consent: Analytics data collection and advertising (where required)
- Legal Obligation: Compliance with applicable laws and regulations
14.1 Crash and Performance Data
- Legal basis: Legitimate interest
- Purpose: Maintaining app functionality and user experience
- Justification: Essential for identifying and fixing bugs that could impact user experience and app security
- User rights: Information provided in this privacy policy; data automatically deleted after 90 days
15. Supervisory Authority
If you have concerns about our data processing practices, you have the right to lodge a complaint with your local data protection authority. For EU residents, you can find your local authority at: https://edpb.europa.eu/about-edpb/board/members_en