Places should earn your trust
QuietCheck listens for the signals that smart glasses, Bluetooth trackers and drones broadcast to anyone in range, and gives you a read on what is around you with a stated confidence for each finding.
Every method it uses is heuristic and approximate. It can miss real devices and it can flag things that turn out to be harmless. No alert is not a guarantee of safety.
What it detects
Every detection is proximity‑only by design. QuietCheck can notice what is physically near the phone it is running on, right now. It has no way to look up, locate or monitor a specific device or person anywhere else.
Camera glasses that are broadcasting.
Matches the Bluetooth advertising signal against manufacturer identifiers known to belong to smart‑glasses hardware — Meta Ray‑Ban, Snap Spectacles and others.
Tile, Chipolo and similar tags in range.
Detects trackers by the manufacturer identifiers they broadcast continuously, the same publicly visible signal any Bluetooth scanner can see.
Aircraft sending the Remote ID broadcast.
Parses the standardized ASTM F3411 Remote ID broadcast that most drones now transmit over Bluetooth — a real aviation‑safety standard, not an inference.
A lens‑glint scan, run only when you start it.
With the flashlight on in a dim room, a camera lens reflects light back as a small, sharp, unusually bright point. QuietCheck looks for that pattern in live camera frames, on‑device, frame by frame in memory. Nothing is recorded, saved or transmitted.
How sure we are
QuietCheck tells you something is probably nearby. It never tells you something is definitely there.
A manufacturer ID verified against an authoritative registry, from a company whose only real product line matches the category — or a validly formatted Remote ID broadcast.
A real, verified manufacturer ID, but from a company whose product line is broader than this one category, so the match is a weaker signal.
A plausible but unconfirmed signal. Shown so you are not left with no information at all, and labeled clearly as needing more confirmation.
The scope statement
The most useful page we can give you. Some of these are features we built and then removed.
A phone cannot detect an active microphone. There is no signal to read. We cut the feature rather than ship the theater.
A device can share a manufacturer identifier with matching hardware without being that hardware. We report the category and our confidence, never an identity.
Distance comes from a path‑loss model on signal strength — noisy by nature, thrown off by reflection, orientation, obstructions and power differences. The angle on the radar view is illustrative, not a compass bearing. Bluetooth does not support direction‑finding.
A wired camera, a cellular GPS logger, a device that is powered off, or hardware broadcasting under an identifier we do not yet recognize. No signal, no finding.
iOS gives no app access to the baseband radio. Nothing on the App Store can do this honestly, ours included.
Background Bluetooth scanning is best‑effort on iOS. The platform does not reliably deliver new device discoveries once an app is suspended, for the kind of broad scan this requires.
No alert is not a guarantee of safety.
A quiet sweep means nothing answered. It does not mean nothing is there.
Support
If yours isn’t here, the contact address is at the bottom of this page and a person reads it.
Bluetooth is how it listens for the publicly broadcast advertising signals that smart glasses, trackers and drones send out — the same signal any Bluetooth scanner can see. QuietCheck never connects to, pairs with, or controls any device it detects. It only listens.
Only for the optional Hidden Camera Check, which analyzes live camera frames on‑device to look for a lens‑glint pattern. It runs only while that screen is open and scanning is active — never automatically, never in the background. No image or video is recorded, saved or transmitted.
It doesn’t, unless you ask for it. Location is optional and off by default. Turning on “Tag detections with location” records an approximate location alongside future detections so you can review them on a map. That data stays on your device. A separate toggle, also off by default, lets you contribute an anonymous +1 to a shared community sighting‑density map.
Only if you turn on Meeting mode, which is off by default. It checks your calendar on‑device for a current or upcoming meeting so QuietCheck can offer to start a scan. Your calendar is read on‑device only and is never sent anywhere.
Almost everything QuietCheck does happens entirely on your iPhone with no network access at all. No analytics SDK, no ad SDK, no tracking of any kind. A handful of optional features do talk to a server — signature‑database sync, anonymous feedback, and the opt‑in community map — and the privacy policy spells out exactly what each one sends.
Yes. Scanning, matching, notifying and history all work fully offline. The app tries once on launch to sync its signature database and falls back silently to the bundled offline copy if that is unreachable.
No. Every detection mechanism is proximity‑only by design. It can detect what is physically near the phone running it, right now, and has no way to look up, locate or monitor a specific device or person anywhere else.
Background Bluetooth scanning is best‑effort on iOS. The platform doesn’t reliably deliver newly appearing device discoveries once an app is suspended, for the kind of broad scan QuietCheck has to run. A missing alert while backgrounded doesn’t mean nothing was nearby.
QuietCheck is an independent app and is not affiliated with, endorsed by, or sponsored by Meta, Snap Inc., Luxottica, TCL, Tile Inc., Chipolo d.o.o., Samsung, or any other manufacturer referenced in the app.