Loupe

Loupe is a privacy-focused iOS and iPadOS application created to help users understand the device fingerprinting surface exposed by their devices. The app reads values from public iOS APIs and presents them in a transparent format so users can see what information other applications may be able to access. Rather than collecting or transmitting personal data, Loupe focuses on education and awareness by demonstrating how device characteristics can be observed through standard system interfaces. It provides a hands-on exploration of identifiers, hardware information, and other attributes that can contribute to fingerprinting techniques. All information remains on the device unless the user explicitly chooses to export it, reinforcing the project's privacy-first philosophy. By exposing these signals in a clear and accessible way, Loupe helps users, developers, and researchers better understand the privacy implications of mobile device fingerprinting.