格物 Whence

Whence lays open where the devices around you actually come from — what you are connected to, and what you are holding. ■ Looking outward: what your Wi-Fi actually is • Reads the BSSID of the access point you're on and resolves the manufacturer from the IEEE registry • When the BSSID is a locally administered address, it says so — such addresses do not identify a real manufacturer. The three possible causes are shown side by side rather than picking one for you. ■ Looking inward: what this iPhone is made of • Core split, native resolution and refresh rate, per-lens camera parameters, sensors and radios, storage and power — all measured directly • Model specifications from a bundled catalog, cross-checked against what was measured, with the result shown either way ■ Every value is labeled with where it came from Measured, catalog, inferred, unavailable — four distinct provenance levels. Anything inferred is visually de-emphasized and carries an explanation. You can see at a glance what was actually read. ■ We say plainly what cannot be read Battery health, cycle count, and the real suppliers of the display and battery are not available to third-party apps on iOS. This app tells you it cannot read them, rather than leaving a blank or filling in an estimate. Any app claiming to detect these directly on an iPhone is not telling you the truth. ■ Privacy • Makes exactly one kind of network request: the public-IP lookup on the Network page (one HTTPS request to an echo service, plus at most one IPv4-only request when the public IP is IPv6). Everything else, including the public IP's location and ISP (looked up in an on-device offline database), ships inside the app. • Collects nothing, uploads nothing. • Declares exactly one permission: location. It is used solely to satisfy iOS's precondition for reading Wi-Fi information — no coordinates are requested, stored, or transmitted.