Spectra by Arc Signal

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Privacy starts with awareness

Derfor forventer vi det: Honest disclaimers, a clear privacy use case, and a thoughtful Watch workflow make this a promising utility.

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Spectra by Arc Signal is a utilities app for checking hotel rooms, rentals, rideshares and other shared spaces. It reviews nearby Bluetooth activity, supported devices on your local network, and close-range magnetic changes, with an optional Apple Watch companion for collecting Bluetooth sweeps. Its standout feature is that all scan interpretation happens on the iPhone, with no account required and sharing left to the user.

Resumé fra Debuts, baseret på app-siden i App Store.

Om appen

Privacy starts with awareness.

A hotel room. A rental. A rideshare. A space you share. Spectra by Arc Signal brings Bluetooth activity, supported local-network services and close-range magnetic clues together—so a privacy check can be part of settling in.

An Experimental Apple Watch companion is included: collect Bluetooth clues without your iPhone nearby, then review them on iPhone later.

Recognize nearby Bluetooth activity

Get a 30-second Bluetooth snapshot without pairing. Names and broadcast clues suggest possible device families or models—from headphones and speakers to supported smart glasses and wearables. Focused checks narrow your review. Follow supported findings with fresh live signal-strength readings—not distance or direction.

Learn from your local network

Explore supported services from speakers, streaming players and smart-home products on your joined network. Useful clues, even without an exact model—not a scan of every nearby Wi-Fi radio or proof of a device's physical location.

Look for clues to concealed electronics

Some electronic components produce magnetic fields your iPhone's magnetometer may detect at close range—even without a recognizable wireless broadcast. In Area Sweep, repeatable changes may warrant a closer physical look. Practice with familiar objects.

Ordinary magnets, magnetic metal and phone accessories can affect readings. A magnetic change cannot identify a camera or microphone or prove recording. Some electronics produce little detectable change; a quiet reading does not rule out a device.

Collect on Watch. Review on iPhone.

Capture a 30-second Bluetooth sweep on Apple Watch. Keep Spectra active and the display fully awake; this is not background scanning. Save up to five local captures, then reconnect and open Spectra on your paired iPhone to review possible matches. Unsent captures are kept; full storage can block a sweep. Apple Watch is optional.

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