# SigScan: Signal Radar — See the signals around you > See the signals around you (iPhone/iPad app by james tannahill.) - Source: https://appshunter.io/ios/app/sigscan-signal-radar/id6806315838 (this page in markdown: same URL + `.md`) - Developer: [james tannahill](https://appshunter.io/developer/1883186220) - Category: Utilities, Reference - Price: Free - Age rating: 4+ - Requires: iOS 17.0 · 4 MB - Languages: American English - Released: 2026-09-08 - Data updated: 2026-10-15 ## What is SigScan? The air around you is full of invisible signals. SigScan makes them visible. Point your phone around a room and every nearby Bluetooth device appears as a floating bubble in augmented reality, anchored in real space. Walk toward a bubble and the signal gets stronger. Devices behind walls fade. Off-screen devices show as compass arrows at the edge of your screen. WHAT SIGSCAN SEES - Bluetooth devices: manufacturer, product, signal strength and estimated distance for phones, wearables, headphones, trackers and smart home gear - NFC tags: hold your phone against a tag to decode what is on it - Your network: connected WiFi details, local devices, services and discovery traffic - HomeKit accessories: every one by room, with model, serial and firmware version - Cellular: your network type and radio technology EVERY MANUFACTURER, NOT A SHORTLIST SigScan carries the complete Bluetooth industry registry and the full IEEE hardware registry: more than 22,000 manufacturers and 44,000 identifiers, held entirely on your device. Hardware other scanners leave as Unknown gets a name. Where a manufacturer publishes its advertising format, SigScan goes further and names the exact product. SwitchBot and Xiaomi devices are identified down to the model. THE CHIP AND THE BRAND ARE DIFFERENT THINGS Most devices are built on somebody else's radio, which is why scanners so often report a sensor as an Espressif or Nordic device. SigScan reports the chip maker and the brand separately, shows the evidence behind each identification, and tells you what else it could have been. LIVE READINGS FROM THE AIR Sensors that broadcast their measurements are read as they pass: temperature, humidity, battery, motion and contact state, from thermometers, leak detectors, door sensors and more. Nothing is connected to and nothing is requested. These devices are already announcing it to anyone listening. FIND UNKNOWN TRACKERS SigScan flags devices that deserve a second look: known tracker models, unnamed devices broadcasting at high power, and hardware from vendors on the FCC Covered List or restricted under Section 889, including their subsidiaries. YOUR SCAN HISTORY, MAPPED Every scan is saved on your device with the location where it happened. Review sessions on a map, see which devices appeared where, and export your data as CSV. ASK QUESTIONS IN PLAIN ENGLISH The built-in assistant answers questions about your scan results, such as what the strongest unknown device near you is, what kind of device something is, or whether anything new appeared in the last ten minutes. EVERYTHING EXPLAINED Tap the information icon beside any reading for a plain explanation of what it means, or open the glossary for the full reference: signal strength, distance estimates, discovery protocols and how each identification was made. PRIVATE BY DESIGN Your scan data and locations never leave your device. Identification runs entirely offline against data shipped with the app. Questions to the assistant send only a short summary of nearby device names, never your location and never any identifier. No accounts, no ads, no tracking. REQUIREMENTS - iPhone with iOS 17 or later - AR features work best on LiDAR-equipped iPhones (iPhone 12 Pro and later Pro models) - Bluetooth, camera and location permissions for full functionality SigScan is a tool for understanding your own wireless surroundings and checking your own devices and spaces. ## Is SigScan safe? Not enough ratings yet to assess SigScan. ## Is SigScan legit? SigScan: Signal Radar appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for SigScan is 65 out of 100 points across 7 verification signals from App Store and developer data. ## Version history (last 3 releases) ### 1.3 — 2026-09-10 SigScan now knows every Bluetooth manufacturer rather than a shortlist: the complete SIG and IEEE registries, held on your device. SwitchBot and Xiaomi products are named by exact model, and sensors that broadcast temperature, humidity or battery are read straight from the air. Chip maker and brand are now reported separately, and every identification shows the evidence behind it. Restricted vendor flags corrected. New tooltips and glossary entries throughout. ### 1.2 — 2026-09-09 Glossary Every explanatory tooltip in the app now lives in a searchable glossary, grouped by category with cross-linked terms. Reach it from the book icon on any screen. Follows A new view in the Log tab compares the Bluetooth sightings you have recorded and lists devices that were with you in several places over time. Results cover your logged sessions only, and matches that rely on a device's advertised characteristics rather than a stable identifier are labelled as unconfirmed. Places Save a location, capture a baseline of the devices normally there, and later scans show what is new, what is gone, and what was also there before. Improvements Tooltips no longer clip long explanations. The Cellular view now states plainly which values iOS withholds from all apps, rather than showing them as empty or unknown. ### 1.0 — 2026-09-08 No release notes. ## Apps similar to SigScan | App | Rating | Price | Category | | --- | --- | --- | --- | | [Signal Watch Guard](https://appshunter.io/ios/app/signal-watch-guard/id6801983545) | 5.0 (1) | Free | Utilities | | [SignalFind: Bluetooth Finder](https://appshunter.io/ios/app/signalfind-bluetooth-finder/id6801486504) | — | Free | Utilities | | [WisefidoBle](https://appshunter.io/ios/app/wisefidoble/id6744308525) | — | Free | Utilities | | [Device Tracker: Oopti Find Air](https://appshunter.io/ios/app/device-tracker-oopti-find-air/id6756211586) | 5.0 (1) | Free | Utilities | | [Air Finder: My Lost Device](https://appshunter.io/ios/app/air-finder-my-lost-device/id6797255156) | — | Free | Utilities | | [NearSight](https://appshunter.io/ios/app/nearsight/id6789324781) | 5.0 (1) | Free | Utilities | ## More apps by james tannahill - [OpenTime](https://appshunter.io/ios/app/opentime/id6760204246) - [Nargusta](https://appshunter.io/ios/app/nargusta/id6793273419) All apps by james tannahill: https://appshunter.io/developer/1883186220 --- *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 2026-10-15.*