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)
	329 points by Cider9986 23 hours ago \| 124 comments
	tl;dr: Loupe is an open-source iOS/iPadOS app (built almost entirely with AI coding tools) that reveals what device fingerprinting data any third-party app can access via public iOS APIs. It organizes readings into three tiers—Passive (no prompt), Needs Permission, and Advanced side-channel techniques like `canOpenURL` probing and Keychain persistence across reinstalls. All data stays on-device, and the project is made by Mysk as a companion to their privacy-focused Psylo browser.
	HN Discussion: ↑Outrage at how much data apps can access by default, calling for opt-in controls ↑Specific privacy leaks (device setup date, volume creation, installed apps) are particularly egregious and need OS-level fixes •Technical clarification that iOS restricts app enumeration more than some commenters suggest ↑Appreciation for the awareness tool and sharing similar projects/demos ↓Skepticism about the app's quality due to it being AI-generated