Seen by people. Not by machines.
Privacy Policy
Effective November 8, 2026. The Signet Optics app is published by Bryant McCray.
The short version
Signet never collects your face. The app has no account. What it uses stays on your iPhone.
What the app uses, and where it stays
Location. Only while the app is open, only if you allow it, only to center the map near you. Signet does not store or send it.
Calendar. Only if you allow it. The app reads this evening's events on your iPhone to show what is mapped around each venue. Event details never leave your phone.
Your face and photos. Never collected. The app has no camera access and no face scanning.
Pairs and certificates. Shown from data in the app. No account is created.
Client file. Optional. What you enter (how to address you, how to reach you, frame fit preferences) is stored only on your iPhone, in a file encrypted while the phone is locked. It is shared only if you send a concierge email that includes it, and you see every line before you send. You can erase it in the app at any time.
Frame chip. When you tap your iPhone to a Signet frame, the app reads the chip's one-time code to confirm the pair is genuine. If that check needs the Signet server, only the code is sent, never your name or location. Re-test reminders are scheduled on your iPhone.
Registry. Signet keeps a registry of each pair: its serial, its tests, and its status. When you claim a pair, the registry records that it has an owner and gives your iPhone a private owner key, which stays on that iPhone. Signet stores only a scrambled form of it. If you report a pair lost, found or transferred, the registry records that, and the recipient's name for a transfer. To limit abuse, Signet briefly counts requests using a scrambled form of your network address, kept for 10 minutes. Nothing is used for advertising or shared with anyone.
Requests. When you tap Request in The Collection, your own email app opens a message to Signet. Signet receives only what you choose to send, and uses it only to reply.
Map provider
Maps are provided by Mapbox. Loading the map sends standard requests to Mapbox, such as the map area being shown. Mapbox's optional usage telemetry is off by default in Signet. If you turn it on in the app's Privacy screen, Mapbox receives de-identified location and usage data under its own privacy policy.
Map data
Official camera locations come from the City of Chicago Data Portal. Community camera locations come from OpenStreetMap contributors and are available under the Open Database License. Signet does not send your data to either.
Tracking
Signet does not track you across apps or websites and does not use advertising identifiers.
Children
Signet is not directed to children and does not knowingly collect information from anyone.
Changes
If this policy changes, the new version will be posted on this page with a new effective date.