Privacy Policy

Last Updated: November 21, 2025

1. Introduction

Welcome to Handwerker Toolbox. This Privacy Policy explains how we collect, use, and protect your information when you use our mobile application. We are committed to protecting your privacy and ensuring transparency about our data practices.

By using Handwerker Toolbox, you agree to the collection and use of information in accordance with this policy. If you do not agree with this policy, please do not use our app.

2. Information We Collect

2.1 Information You Provide

Handwerker Toolbox is designed to work completely offline and does not require you to create an account or provide personal information. Any data you enter into the calculators (measurements, quantities, etc.) is stored locally on your device and is never transmitted to our servers.

2.2 Automatically Collected Information

When you use our app, we may automatically collect certain information, including:

• Device Information: Device model, operating system version, unique device identifiers
• App Usage Data: Features used, calculation types performed, app crashes and performance data
• Preference Settings: Language preferences, theme settings (light/dark mode)

2.3 Information Collected by Third Parties

We use Google AdMob to display advertisements in our app. AdMob may collect and use certain information for advertising purposes. This includes:

• Advertising ID (AAID on Android, IDFA on iOS)
• IP address
• Device information and identifiers
• Ad interaction data
• General location information (country/city level)

3. How We Use Your Information

We use the collected information for the following purposes:

• App Functionality: To provide and maintain the core features of the app
• Personalization: To remember your language and theme preferences
• Analytics: To understand how users interact with the app and improve features
• Advertising: To display relevant advertisements through Google AdMob
• Bug Fixes: To identify and fix technical issues and crashes
• App Improvements: To develop new features and enhance user experience

4. Data Storage and Security

All calculation data and user preferences are stored locally on your device. We do not transmit this data to any external servers. Your data remains on your device and is protected by your device's security features.

While we implement reasonable security measures, please note that no method of electronic storage is 100% secure. We cannot guarantee absolute security of your information.

5. Third-Party Services

5.1 Google AdMob

We use Google AdMob to display advertisements in our app. AdMob is a third-party advertising service provided by Google LLC. AdMob may use cookies and similar technologies to collect information about your device and app usage to provide personalized advertisements.

For more information about how Google uses your data, please review:

• Google Privacy Policy: https://policies.google.com/privacy
• Google AdMob Partners: https://support.google.com/admob/answer/9012903

5.2 Your Advertising Choices

You can opt out of personalized advertising by:

• Android: Go to Settings → Google → Ads → Opt out of Ads Personalization
• iOS: Go to Settings → Privacy → Advertising → Limit Ad Tracking

6. Children's Privacy

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

7. Data Retention

All app data is stored locally on your device and remains there until you uninstall the app or manually clear the app's data. We do not store your calculation data on our servers, so we have no data to retain or delete.

8. Your Rights

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

• Access: Request information about what data we have about you
• Deletion: Request deletion of your data (you can do this by uninstalling the app)
• Opt-Out: Opt out of personalized advertising (see Section 5.2)
• Portability: Request a copy of your data in a portable format

To exercise these rights or if you have questions about your privacy, please contact us using the information provided below.

9. International Data Transfers

Your information, including data collected by third-party services like AdMob, may be transferred to and processed in countries other than your country of residence. These countries may have different data protection laws. By using our app, you consent to such transfers.

10. 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 on this page and updating the "Last Updated" date at the top of this policy.

We encourage you to review this Privacy Policy periodically for any changes. Changes to this Privacy Policy are effective when they are posted on this page.

11. GDPR Compliance (European Users)

If you are located in the European Economic Area (EEA), you have certain rights under the General Data Protection Regulation (GDPR), including:

• 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

The legal basis for processing your data is your consent and our legitimate interest in providing and improving our services.

12. California Privacy Rights (CCPA)

If you are a California resident, you have specific rights regarding your personal information under the California Consumer Privacy Act (CCPA), including:

• Right to know what personal information is collected
• Right to know whether personal information is sold or disclosed
• Right to opt-out of the sale of personal information
• Right to deletion of personal information
• Right to non-discrimination for exercising your rights

We do not sell your personal information. To exercise any of these rights, please contact us.

13. Contact Us

14. Consent

By using Handwerker Toolbox, you consent to this Privacy Policy and agree to its terms. If you do not agree with this policy, please uninstall the app and discontinue use.