RF Signal Detector vs Listening Device Detector
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RF Signal Detector
This tool helps detect hidden electronic devices and cameras by scanning for electromagnetic fields and network connections. It offers real-time visualizers and alerts, all processed offline without requiring an account or sharing your data.
- Smart RF Detector
- Network Scanner
- Real-Time Visualizer
- Haptic & Audio Alerts
- 100% Offline Processing
- Zero Account Required
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Protect your peace of mind with ReFi. A secure, offline tool to find hidden devices and cameras. Are You Truly Alone? Hidden spy cameras, rogue microphones, and trackers are smaller and easier to hide than ever before. Whether you are in a hotel, an Airbnb, or a sensitive meeting, your privacy matters. Meet ReFi, your essential rf signal detector designed to help you scan your surroundings, locate suspicious electronic emissions, and secure your personal space. Why Choose ReFi? Most security apps require intrusive permissions or upload your data. Not us. Our usp is a privacy first rf detector. We believe a tool built to protect you should never track you. 100% Offline Processing: All scans happen entirely on your device. Zero Account Required: No registration, no emails, no tracking. No Data Sharing: We never collect, sell, or share your metrics. Key Features Smart RF Detector: Detect electromagnetic fields emitted by hidden electronic devices, lenses, and spy bugs. Network Scanner: Identify unauthorized devices connected to local Wi-Fi or Bluetooth networks. Real-Time Visualizer: Easy-to-read signal strength charts spike as you get closer to a threat. Haptic & Audio Alerts: Receive instant sound and vibration feedback to help you sweep a room discreetly. Perfect For: Travelers: Sweep vacation rentals and hotel rooms. Professionals: Secure conference rooms before sensitive discussions. Privacy Enthusiasts: Add an extra layer of daily defense against surveillance. Disclaimer: ReFi uses your phone’s built-in magnetometer and wireless sensors to locate potential threats. While highly effective as a first line of defense, standard smartphones cannot detect all dormant or military-grade signals. Download ReFi today—secure your space and keep your personal life private. Terms(EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy policy:https://nulladevs.com/app-privacy-policy/
Listening Device Detector
This app scans your surroundings for devices that can listen to you, checking Wi-Fi, Bluetooth, and magnetic fields. It identifies and explains potential listening devices like smart speakers and cameras, offering a guided physical sweep for areas your phone can't see.
- Network sweep for smart speakers and voice assistants
- Detects IP cameras and baby monitors
- Identifies Bluetooth audio devices
- Provides device classification and explanation
- Guided physical room sweep
- Lists limitations of phone-based detection
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LD sweeps the room you are in and answers one question: what here can hear you? It checks the Wi-Fi network you are on, the Bluetooth around you, and the magnetic field, then gives you a report. Every device is named, classified and explained — not a needle on a dial you have to interpret. Everything runs on your phone. No account, no sign-up, nothing uploaded. WHAT A SWEEP FINDS Smart speakers and voice assistants. Echo, Nest, HomePod and the rest announce themselves on the network, and LD tells you which ones listen for a wake word. IP cameras and baby monitors. Anything streaming over RTSP or ONVIF is visible, and nearly all carry a microphone next to the lens. Bluetooth audio devices. Headsets, speakers and earbuds broadcasting nearby, including ones you never paired. Everything else on the network. Printers, computers and file shares are listed too, so every device is accounted for. EVERY FINDING EXPLAINS ITSELF Tap any device and LD shows what it actually broadcast, why that led to the conclusion, and what to do about it. A verdict you cannot check is not worth much. THE GUIDED ROOM SWEEP The devices a phone cannot see have to be found by looking, in the right places, in order. LD includes a step-by-step physical sweep: smoke detectors and ceiling fittings, anything with a plug, air vents, mirrors, the bedside area, the bathroom. WHAT NO APP CAN FIND, INCLUDING THIS ONE Read this before you trust a clean result. A covert bug transmitting on its own radio frequency sends on a band an iPhone has no receiver for. It is invisible to this app and to every other app - those are found with a dedicated RF detector, not a phone. A bug with a SIM card reports over the mobile network and broadcasts nothing. A recorder that only stores audio transmits nothing at all. A wired microphone is electrically silent from outside. Anything switched off is not there to be found. LD does not detect hidden cameras by their lens or infrared - that is a different technique. It finds cameras only when they are on the network. So a clean sweep means exactly one thing: nothing with a microphone answered on this network or over Bluetooth. It is not proof a room is clear, which is why the guided physical sweep exists. WHAT YOU GET FREE - Full sweep across network, Bluetooth and magnetic checks - The findings report, with every device named and classified - Device detail showing the evidence behind each conclusion - The hotel room guided sweep - The complete, honest list of what a phone cannot detect WHAT PRO ADDS - Guided sweeps for cars, offices and rental homes - History, so you can spot a device that was not there last time - Magnetic locator with a live proximity meter - Export a sweep report as CSV IF YOU THINK YOU ARE BEING MONITORED Contact the police. If you find a device, photograph it where it sits rather than handling it, and report it. In a rental, tell the platform too - an undisclosed indoor camera breaks most of their rules. LD is a tool for checking a room, not a substitute for the authorities. PRIVACY Sweeps stay on your device. No account, no analytics, nothing uploaded. LD reads what devices broadcast about themselves — it never connects to them, logs in, or sends them anything. SUBSCRIPTION LD Pro is available as a weekly subscription at $3.99 with a 3-day free trial, or a yearly subscription at $17.99. Payment is charged to your Apple ID at confirmation of purchase. Subscriptions renew automatically unless auto-renew is turned off at least 24 hours before the end of the current period. Your account is charged for renewal within 24 hours before the end of the current period. You can manage and cancel your subscription in your App Store account settings after purchase. Any unused portion of a free trial is forfeited when you buy a subscription. Privacy Policy: https://leomarston.github.io/manycode-legal/privacy.html Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: RF Signal Detector at none against Listening Device Detector's 2. RF Signal Detector also leads on ratings volume (18 vs 4) and iOS requirement (15.0 vs 17.0). On price, rating, ads and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Listening Device Detector sells 2 in-app purchases, starting at $3.99 per 7 days. RF Signal Detector asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.8 for RF Signal Detector against 4.8 for Listening Device Detector. Both are backed by a comparable volume of ratings — 18 and 4 respectively.
| Parameter | RF Signal Detector | Listening Device Detector |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (18 ratings) — better | 4.8 (4 ratings) |
| Number of ratings | 18 — better | 4 |
| Update frequency | Every 5 days | — |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free with in-app purchases | Freemium |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 68 MB | 13 MB |
| Age rating | 4+ | 4+ |
| Developer | Daniel Dominguez | Emine Saridogan |
In-app purchases
RF Signal Detector
No in-app purchases
Listening Device Detector
- Weekly3 Days trial$3.997 Days
- Yearly$17.991 Year
Questions
Is RF Signal Detector free?
Is Listening Device Detector free?
Which has better reviews, RF Signal Detector or Listening Device Detector?
Do RF Signal Detector or Listening Device Detector have ads?
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