Privacy policy

Last updated: April 16, 2026

Data Controller

Christopher Brock
Vennhauser Allee 196 C
40627 Düsseldorf
Deutschland
Email: support@zeroduplicates.com

Data Processing

Zero Duplicates processes all files locally on your device. No files or personal data are transmitted to external servers.

Website Analytics

This website uses PostHog for cookieless audience measurement, operated by PostHog Inc. Website data is stored on PostHog Cloud EU, with servers located within the European Union. PostHog Inc. is a U.S.-incorporated company; any access to data from outside the EU is governed by the EU Standard Contractual Clauses (Art. 46 GDPR) and, where applicable, the EU–U.S. Data Privacy Framework adequacy decision (Art. 45 GDPR). Privacy policy: https://posthog.com/privacy

What is Collected

Page URL, including any campaign parameters contained in the link you followed
Referrer
Timestamp
Browser, operating system, device type and language
IP address, processed by PostHog to derive an approximate country/region
Interactions with page elements, such as clicks on links and buttons

What is NOT Collected

No cookies and no local storage; analytics state is kept in memory only and is discarded when the page is closed
No persistent identifiers and no cross-site tracking
No account information, email addresses or names
No files, file names or scan results

Legal Basis

Website analytics processing is based on legitimate interests (Art. 6(1)(f) GDPR) for privacy-friendly audience measurement. No cookies or local storage are used, so no consent to device access is requested. You can object to this processing at any time under Art. 21 GDPR by enabling Do Not Track in your browser, which the analytics script honors, or by contacting me at the address above.

Retention

Events are kept only as long as they are needed for aggregate traffic analysis and are deleted in line with the retention period of the PostHog plan in use. Session recordings are disabled entirely.

Usage Analytics

The app includes optional usage analytics to help me understand how the app is used and improve it over time. This feature is disabled by default and requires your explicit consent during first launch or via Settings. Processing is based on your explicit consent under GDPR Art. 6(1)(a).

What is Collected

Analytics data does not identify you personally. Each event includes:

Screen views and navigation patterns
Features used within the app
Scan statistics (aggregate duplicate counts and total size)
Paywall and in-app purchase flow events — event types only, never payment details
Subscription tier
App and system language preferences
Device class and platform
App version, build number, and build configuration
Errors encountered (error types only, no file paths or personal data)
A per-session identifier (see below)

What is NOT Collected

Analytics data does not contain:

Files or filenames
Scan results or file paths
IP addresses (not stored by the analytics providers used here)
Persistent device identifiers or fingerprints
Account information, email addresses, or names
Cross-session user tracking — only a per-session identifier is used (see below)

Session Identifier

Events within a single app session are grouped by a session identifier that is generated fresh at each app launch, is not persisted, and is not reused. Activity therefore cannot be correlated between different sessions or across devices.

Analytics Providers and Storage

Analytics data is transmitted over an encrypted connection to:

PostHog — operated by PostHog Inc. Data for this app is stored on PostHog Cloud EU, with servers located within the European Union. PostHog Inc. is a U.S.-incorporated company; any access to data from outside the EU is governed by the EU Standard Contractual Clauses (Art. 46 GDPR) and, where applicable, the EU–U.S. Data Privacy Framework adequacy decision (Art. 45 GDPR). Privacy policy: https://posthog.com/privacy.
Aptabase — a self-hosted instance of the open-source Aptabase analytics software, running on a server located in Germany and operated directly by the data controller. No third-party company processes this data.

The sole purpose of this processing is to understand aggregate app usage and improve features.

Your Control

To disable usage analytics: Settings → Usage Analytics → toggle off

Crash Reporting

The app includes optional crash reporting to improve stability. This feature is disabled by default and requires your explicit consent during first launch or via Settings. Processing is based on your explicit consent under GDPR Art. 6(1)(a).

What is Collected

Crash reports are completely anonymous and contain only technical diagnostic information:

Error type and stack trace
Device model and OS version
App version and available memory

What is NOT Collected

Crash reports do not contain:

Files or filenames
Scan results
IP addresses
User identifiers or account information
Usage analytics or behavioral tracking

Storage and Purpose

Crash reports are transmitted via encrypted connection to a server hosted in Germany. The sole purpose is to identify and fix crashes to improve app stability.

Your Control

To disable crash reporting: Settings → Crash Reporting → toggle off

In-App Purchases

Payment processing and subscription management is handled exclusively by Apple. I do not have access to your payment details. See Terms and Conditions for details.

Your Rights

You can disable crash reporting and usage analytics at any time in Settings. Because neither crash reports nor analytics events contain direct identifiers (no account, email, IP address, or persistent device identifier) and session identifiers are not reused across sessions, I have no reliable way to locate data belonging to a specific individual and therefore cannot fulfill data access or deletion requests for specific users.

Changes to This Policy

This privacy policy may be updated to reflect changes in the app or legal requirements.

Contact

For questions: support@zeroduplicates.com