# Spectra by Arc Signal — Privacy & Nearby Signals > Detects nearby Bluetooth, local network services, and magnetic clues for privacy awareness. (iPhone/iPad app by Arc Signal LLC.) - Source: https://appshunter.io/ios/app/spectra-by-arc-signal/id6822605110 (this page in markdown: same URL + `.md`) - Developer: [Arc Signal LLC](https://appshunter.io/developer/6822605112) - Category: Utilities - Price: $2.99 - Rating: 5.00/5 from 1 App Store ratings · 1 written reviews indexed - Age rating: 4+ - Requires: iOS 27.0 · 27 MB - Languages: American English - Released: 2026-10-20 - Data updated: 2026-10-29 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/spectra-by-arc-signal/id6822605110/reviews.md ## What is Spectra by Arc Signal? 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. Notice what changes Monitor radio activity against a baseline while your iPhone stays in one place. See a count of signal identities newly observed since that baseline—not ones seen earlier in this session. Review an activity snapshot without stopping your check. Changes do not prove a device arrived or left. Your observations. Your control. Scan interpretation runs on your iPhone. No account, in-app ads, subscription or in-app purchase. Scans aren't automatically sent to Arc Signal or an external AI service; sharing is your choice. Explore a finding with optional on-device Apple Intelligence, or review a prepared prompt and evidence to share or copy to an external AI app. Recipient policies apply; AI can make mistakes. Keep what matters Save searchable sessions, pin findings and add personal notes. Pins and personal finding notes stay local, outside exports and AI explanations. Revisit magnetic graphs, export or import supported archives after review. Archived results are historical—not fresh measurements. Saved iPhone sessions aren’t automatically removed. Built to keep getting better Catalog and detection-engine improvements are included in App Store updates at no additional charge. Recheck eligible saved evidence with newer recognition—not new measurements. Originals stay unchanged; better matches aren't guaranteed. Know the limits Spectra cannot prove a device is hidden, recording or malicious. Names and matches don't authenticate identity. Silent, wired, shielded or unrecognizable devices may be missed; no findings is not an all-clear. Checks need Spectra open and active. Results depend on signals, permissions, hardware and measurement quality. Inspect only places you are allowed to examine; respect privacy and facility rules. Requires iPhone with iOS 27 or later. The optional Watch companion requires watchOS 27 or later and a paired supported iPhone. On-device AI needs compatible hardware and enabled, available Apple Intelligence. Developed by Arc Signal LLC. ## Key features - Bluetooth activity detection - Local network service exploration - Magnetic clue detection - Apple Watch companion app - Signal strength readings - Baseline monitoring for changes - Session saving and export ## Chart rankings - #195 in Top Paid · Utilities (US App Store) ## Is Spectra by Arc Signal safe? Not enough ratings yet to assess Spectra by Arc Signal. ## Is Spectra by Arc Signal legit? Spectra by Arc Signal has limited verification signals. The AppsHunter Legitimacy Score for Spectra by Arc Signal is 58 out of 100 points across 7 verification signals from App Store and developer data. ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/spectra-by-arc-signal/id6822605110/reviews.md ### 5/5 — Very Cool *2026-10-21* The UI is intuitive, elegant, and engaging. It’s not just for “techie” people, but walks you through the functions in clear, plain language. Also a great price considering how powerful it is and how much info it provides. ## Frequently asked questions about Spectra by Arc Signal ### What is Spectra by Arc Signal? Spectra by Arc Signal helps you become aware of your surroundings by detecting nearby Bluetooth activity, local network services, and magnetic clues. It's designed to give you a sense of privacy in spaces you share. ### Does Spectra by Arc Signal have ads? No, Spectra by Arc Signal is ad-free. The app description explicitly states there are no in-app ads, subscriptions, or in-app purchases. ### How much does Spectra by Arc Signal cost? Spectra by Arc Signal is a paid application. It is available for a one-time purchase price of $2.99. ### What devices does Spectra by Arc Signal support? Spectra by Arc Signal is supported on both iPhone and Apple Watch. The Apple Watch companion app allows for data collection without your iPhone nearby. ### How often is Spectra by Arc Signal updated? The application is built to continuously improve, with catalog and detection-engine improvements included in updates. The latest version is 1.1.0, last updated on October 21, 2026. ### Can Spectra by Arc Signal detect cameras or microphones? Spectra by Arc Signal's magnetic change detection cannot identify a camera or microphone, nor can it prove recording. A quiet reading does not rule out the presence of a device. ### Is my data shared with Spectra by Arc Signal? No, scan interpretation runs on your iPhone, and scans are not automatically sent to Arc Signal or an external AI service. Sharing your observations is your choice. ### What is the age rating for Spectra by Arc Signal? Spectra by Arc Signal has an age rating of 4+. This indicates it is suitable for a wide range of users. ## Version history (last 3 releases) ### 1.2.0 — 2026-10-28 Pin findings, add personal notes, and see what changed when you recheck a saved session. We’ve also added new app icons, expanded supported audio recognition, and refined saved results and navigation for a clearer experience. ### 1.1.0 — 2026-10-21 Monitor now gives you clearer counts of newly observed signals and activity you can review without stopping your check. We’ve also improved saved Monitor summaries, clarified Bluetooth signal details, and refined baseline controls. ### 1.0.0 — 2026-10-20 No release notes. ## Related topics [signal booster scse](https://appshunter.io/ios/topics/signal-booster-scse) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-29.*