What Findy cannot detect

Devices Findy cannot see at all

Devices on another Wi-Fi network

Network scanning only reaches the network your iPhone is joined to. A camera on the host's private network, on a separate guest network, or on a second router in the same building is completely invisible — it is not "not found", it is out of scope. Many networks, hotel Wi-Fi especially, also isolate clients from one another so that almost nothing is reachable even on the network you are on.

Cellular-connected devices

A camera or tracker with its own SIM sends data over the mobile network and never touches local Wi-Fi. Nothing on your network shows it, and Findy has no way to observe mobile traffic.

Wired cameras

Cameras cabled to a recorder over ethernet or coaxial cable may have no wireless presence at all. If it does not appear on the Wi-Fi you are joined to and emits no infrared or Bluetooth, no scan will surface it. Only visual inspection will.

Offline and local-recording devices

Devices that record to an internal card or USB storage and are retrieved later have no network presence by design. This includes many cameras built into clocks, chargers, pens and smoke-detector housings.

Powered-off devices

A device with no power emits nothing — no radio, no infrared, no network response. It is undetectable by every method in the app. Motion-activated devices that are currently dormant fall into the same gap.

Passive microphones

An audio recorder that stores locally and transmits nothing has no signature Findy can look for. There is no reliable way for a phone to detect one. Any app claiming to find microphones as a category is claiming something a phone cannot do.

Non-broadcasting Bluetooth devices

Bluetooth discovery only lists devices that are actively advertising. A device that is paired and connected, in a sleep state, or using proprietary or rotating identifiers may not appear, or may appear as something that cannot be followed between scans.

Obstructed or shielded devices

Radio signals are attenuated by walls, metal, furniture, dense material and even bodies. A device inside a metal enclosure, behind a wall, or under furniture may be in the room and out of reach of every wireless method. Infrared and lens reflection likewise need an unobstructed line of sight.

Limits imposed by the platform and the hardware

iOS permission and API restrictions

iOS deliberately restricts what third-party apps may observe. Findy cannot read the ARP table, so it cannot resolve hardware addresses or identify a manufacturer from one. It cannot see traffic belonging to other apps or devices, cannot access the network below the level iOS exposes, and cannot scan while it is not the active app beyond the limited background Bluetooth behaviour iOS permits. Camera, local network, Bluetooth and location permissions must each be granted; a declined permission silently removes an entire method.

Variation between iPhone models

Camera-based methods depend on the specific camera module in your handset. Infrared-cut filtering differs between generations, between the front and rear cameras, and between lenses on the same phone. An infrared source clearly visible on one iPhone may be faint or invisible on another. We have not yet characterised individual models — see device compatibility for the current status.

Distance and direction are estimates, not measurements

Findy estimates a distance and shows a direction arrow for a Bluetooth device, but both are derived from signal strength alone, using a generic model. Orientation, obstacles, human bodies, battery level, transmit power and interference all move the reading, often severely, so the figure can be wrong by a large margin. Treat it as warmer or colder while you move — the number should fall as you get closer to the source — never as the device's actual position.

Things Findy will flag that are entirely harmless

False positives from ordinary electronics

Polished screw heads, LEDs, mirrors, glossy plastic, metal trim and glass all reflect directed light in ways that resemble a lens. Remote controls, motion sensors, some LED lighting and heating elements all emit infrared. Speakers, motors, chargers, appliances and building wiring all distort the magnetic field. Smart TVs, printers, speakers, thermostats and set-top boxes all appear on a network scan, and most hotel and home networks are full of devices that identify themselves as nothing in particular.

Environmental interference

Neighbouring networks, dense radio environments, fluorescent and LED lighting, sunlight, reflective surfaces and metal structures in the building all affect readings. The same object can produce a different result in the morning and at night.

An unidentified device is not a dangerous one

This is the distinction the whole app rests on. Most of what Findy observes it cannot say anything about — which describes a great many perfectly ordinary devices — and those are left as Ordinary. Shows camera-related indicators means one of Findy's checks matched, not that a camera exists. Findy deliberately has no "confirmed" state and no certainty score, because it cannot verify what any object is. The one place this slips is the reason string "Likely <vendor> camera", which a name match alone is enough to trigger — read it as a starting point, not a finding.

The step no app replaces

Manual visual inspection remains the most reliable method available to you. Scans narrow down where to look; they do not look for you. Open and examine the objects that are physically capable of concealing a device — smoke detectors, clocks, chargers, plug adapters, air purifiers, decorative items, vents, mirrors and anything pointed at a bed or a bathroom — and check whether an object is present that has no reason to be there.

If Findy flags something

See what each method actually measures · Read our testing methodology · Check device compatibility