Loupe – A iOS app that raises awareness about what native apps can see

	Loupe – A iOS app that raises awareness about what native apps can see(github.com)
	538 points by Cider9986 46 days ago \| 239 comments
	tl;dr: Loupe is an open-source iOS/iPadOS app from Mysk that demonstrates the device fingerprinting surface exposed to third-party apps, displaying raw values from public APIs grouped into three tiers: passive (no prompt), permission-gated, and advanced side-channel techniques like `canOpenURL` probing and Keychain persistence. All data stays local unless explicitly exported. The app was written almost entirely with AI coding tools and serves partly as promotion for Mysk's privacy-focused browser, Psylo.
	HN Discussion: ↑Shock and concern at the amount of fingerprintable data exposed to apps without permission ↑Apple should provide finer-grained controls and better disclosure about app data access ~Correction/clarification that iOS already restricts some access like installed app enumeration ↑Apps should simply not collect extra data in the first place as the real solution •Sharing similar awareness tools or demos for other platforms