Privacy Policy

Last updated: March 2026

1. Data Controller

Robert Mittl
Mittl Medien
Schulstraße 18/1
73061 Ebersbach, Germany
Email: privacy@callvent.app

2. Overview

Callvent is available for iOS and Android. It detects phone calls and helps you create calendar entries. All data is stored exclusively on your device. No data is transmitted to servers, cloud services, or third parties.

3. What Data Does the App Process?

The app processes the following data locally on your device:

• Call information: Time, duration, and direction (incoming/outgoing/missed) of phone calls. On iOS, the app technically cannot read phone numbers from calls – this is prevented by Apple. On Android, the app reads phone numbers from the call log with your permission to display caller information.
• Contact data: Name and phone number of the contact you assign. On iOS, the contact picker runs in a protected sandbox process. On Android, contacts are read with your explicit permission.
• Calendar entries: The app creates entries in the calendar you choose (iCloud, Google, Outlook, etc.). These entries sync through your calendar service – not through Callvent.
• Reminders: Optionally created callback reminders. On iOS, these are stored in the Reminders app. On Android, local notifications are used.
• Caller ID data: Phone numbers and names you import for call identification are stored locally. On iOS, this uses the Call Directory extension. On Android, data is stored in a local Room database.
• Notes and tags: Notes you enter and tags you assign are stored locally.

4. Permissions

The app requires the following permissions, which you can grant or deny individually:

iOS

• Phone (CallKit): To detect when a call starts and ends. No phone numbers are read.
• Contacts: For the contact picker and importing contacts into call identification.
• Calendar: To create calendar entries.
• Reminders: To create callback reminders.
• Notifications: To show a notification with a Quick Save action after calls.

Android

• Phone State: To detect incoming and outgoing calls in real time.
• Call Log: To read call history including phone numbers, duration, and direction.
• Contacts: For the contact picker and importing contacts into caller identification.
• Calendar: To read and create calendar entries.
• Notifications: To show notifications after calls with a Quick Save action.

5. Data Storage

All app data is stored exclusively on your device. On iOS, data is stored as JSON files in the app container. On Android, data is stored in a local Room database. There is no server, no cloud backend. The app does not communicate with any external service.

6. Tracking and Analytics

The app contains no tracking, no analytics, no advertising, and no third-party SDKs. No usage data is collected or transmitted.

7. Hosting

This website is hosted on GitHub Pages (GitHub Inc., a subsidiary of Microsoft Corporation, USA). When you visit the website, technical data (including your IP address, browser type, and time of access) is automatically recorded in server log files. The legal basis is Art. 6(1)(f) GDPR (legitimate interest in providing the website).

GitHub is certified under the EU-US Data Privacy Framework, ensuring an adequate level of data protection for transfers to the USA. More information: GitHub Privacy Statement.

This website does not use cookies, tracking, or analytics.

8. App Stores

The app is distributed through the Apple App Store and Google Play Store. Apple's Privacy Policy and Google's Privacy Policy apply to purchases and downloads respectively. No other third-party services are used.

9. Your Rights (GDPR)

Since all data is stored locally on your device, you have full control at all times:

• Access: All data is viewable directly in the app.
• Deletion: You can delete individual calls or all data in the app. Uninstalling the app removes all data completely.
• Data portability: Calendar entries are available in your calendar service. The call list stays local.
• Withdrawal: You can revoke any permission at any time in your device settings.

10. No Account Required

The app requires no registration, no account, and no sign-in. No personal data is collected to use the app.

11. Children

The app is not directed at children under 16 and does not knowingly collect data from children.

12. Changes

This privacy policy may be updated with app updates. The current version is always available on this page.

13. Contact

For privacy-related questions, you can reach me at:
privacy@callvent.app