Privacy Policy

1. Introduction

Welcome to ConvertMaster (the "App"). We take your privacy seriously. This Privacy Policy explains how we collect, use, store, and protect your personal information.

Please read this Privacy Policy carefully before using the App. By using the App, you agree to the terms of this policy. If you do not agree, please do not use the App.

2. Information We Collect

2.1 Automatically Collected Information

When you use the App, we may automatically collect the following information:

• Device Information: Device model, OS version, device identifiers (IDFA/AAID), screen resolution
• Usage Data: App launch count, feature usage frequency, operation logs, crash logs
• Network Information: IP address, network type, time zone
• Ad Data: Ad impression count, click records (via Google AdMob)

2.2 Information You Provide

• Conversion History: Your unit conversion records (stored locally on device only)
• Favorites: Your saved unit conversion combinations (stored locally on device only)
• Purchase Records: In-app purchase information (processed via Apple/Google servers)

2.3 Third-Party Services

The App uses the following third-party services that may collect your information:

3. How We Use Your Information

We use the collected information for the following purposes:

• Core Functions: Perform unit conversions, save history and favorites
• Display Ads: Show relevant ads through Google AdMob (free version users)
• Improve Products: Analyze usage data, optimize app performance and user experience
• Bug Fixes: Collect crash logs to fix program errors
• Process Purchases: Verify and manage in-app purchases and subscriptions
• Prevent Fraud: Detect and prevent fraudulent activities

4. Data Storage and Security

4.1 Local Storage

The following data is stored only on your device and is not uploaded to our servers:

• Conversion history records
• Saved unit conversion combinations
• App settings (e.g., decimal places, theme mode)

You can clear this data anytime through the app settings.

4.2 Data Security

We take the following measures to protect your data:

• Use industry-standard security protocols to transmit data
• Do not store any sensitive personal information (e.g., name, address, payment card numbers)
• Purchase information is securely processed by Apple/Google, we do not handle payments directly

5. Data Sharing and Disclosure

We will not sell your personal information to third parties. Data may only be shared in the following circumstances:

• Service Providers: Share necessary data with Google (ads and analytics), Apple/Google (app stores)
• Legal Requirements: As required by laws and regulations or legitimate requests from government authorities
• Protect Rights: As necessary to protect our legitimate interests or user safety

6. Your Rights

Depending on your local laws, you may have the following rights:

• Right of Access: Know what data we have collected about you
• Right of Rectification: Correct inaccurate or incomplete data
• Right of Erasure: Request deletion of your personal data
• Right to Restrict Processing: Restrict our processing of your data
• Right to Data Portability: Obtain a copy of your data
• Right to Object: Object to certain data processing activities

To exercise these rights, please contact us through the contact information below.

7. Children's Privacy

This App is not intended for children under 13. We will not knowingly collect personal information from children under 13. If you believe we may have collected information from a child, please contact us immediately for deletion.

8. Ads and Tracking Choices

8.1 Personalized Advertising

You can control personalized ads through the following methods:

• iOS: Settings → Privacy & Security → Tracking → Turn off "Allow Apps to Request to Track"
• Android: Settings → Google → Ads → Choose "Opt out of Personalized Ads"

8.2 Remove Ads

You can remove all ads by purchasing the Pro version. The Pro version offers one-time purchase (lifetime) or subscription (monthly/yearly) options.

9. International Data Transfers

Your data may be transferred to servers outside your country/region (e.g., United States) for processing by Google, Apple, and other service providers. We ensure such transfers comply with applicable laws and take appropriate security measures.

10. Privacy Policy Updates

We may update this Privacy Policy from time to time. Any significant changes will be communicated to you through in-app notifications or email. Continued use of the App constitutes acceptance of the revised policy.

We recommend checking this page regularly for the latest information.

11. Contact Us

12. Additional Terms for Specific Regions

12.1 EU Users (GDPR)

If you are located in the European Economic Area (EEA), we have a legal obligation to protect your personal data under the General Data Protection Regulation (GDPR). We have appointed a Data Protection Officer (DPO) to oversee data protection.

12.2 California Users (CCPA)

If you are a California resident, you have additional privacy rights under the California Consumer Privacy Act (CCPA). We do not sell your personal information.

12.3 Users in Mainland China

In accordance with the Personal Information Protection Law of the People's Republic of China, we have obtained your consent when processing your personal information and strictly adhere to the principle of data minimization.