BLE Sniffer · Bluetooth Low Energy Scanner
Sniff the Bluetooth Low Energy signals around you.
BLE Sniffer is a Bluetooth Low Energy sniffer app for Android and iOS. It scans for the BLE devices broadcasting around you, captures what they advertise — name, address, signal strength, manufacturer, and service UUIDs — and logs every session offline for export to CSV. Built for hardware security research and privacy sweeps.
Available now on Android and iOS
// Capabilities
A focused BLE sniffer for the RF-curious.
Scan & capture
Scan for nearby Bluetooth Low Energy devices that are broadcasting and capture their advertisement data — name, address, RSSI, manufacturer, and service UUIDs.
Log offline, export CSV
Every scan session is logged on-device for offline analysis. Export to CSV whenever you want the raw data in your own hands.
Proximity radar
An RSSI-based radar visualizes how close each device is, so you can sweep a room and home in on a signal.
No ads. No telemetry.
No accounts, no in-app purchases, and no advertising, analytics, or crash-reporting code. The app sends nothing over the internet — no servers, no cloud, no third-party services — so your data stays on your phone unless you choose to export or share it.
// Use cases
Built for two jobs.
BLE Sniffer is the Bluetooth equivalent of a raw-capture tool — passive by default, yours to analyze.
Hardware security research
Enumerate devices, inspect advertisement payloads, and watch how hardware behaves over the air — then export it for deeper analysis.
Personal BLE audits
Walk a space — your home, an office, a rental — and use the proximity radar to see which Bluetooth Low Energy devices are broadcasting nearby and roughly how close they are. It surfaces BLE advertisements only; it can't detect devices that don't broadcast Bluetooth.
Your data stays on your device.
The BLE Sniffer app has no accounts, no cloud, and no advertising, analytics, or crash-reporting code. It sends no data over the internet — no servers, no third-party services — so your scan logs live on your phone until you delete them, and nothing leaves the device unless you choose to export or share it. This website is operated separately and stores only what you send through the contact form (plus standard server logs); see the Privacy Policy for details.
// Guides
Learn what you're looking at.
Bluetooth sniffer vs. BLE sniffer: are they the same thing?
"Bluetooth sniffer" and "BLE sniffer" are used interchangeably, but Bluetooth is really two protocols. Here's what the terms mean, why almost every modern sniffer is a BLE sniffer, and what it takes to sniff Classic Bluetooth.
Bluetooth sniffing: how it works, what it captures, and is it legal?
Bluetooth sniffing means passively capturing Bluetooth radio traffic that's already on the air. Here's how it works, the two very different things people mean by it, what each one needs, and the legal and ethical questions it raises.
Flipper Zero as a BLE sniffer: what it can and can't do
Can the Flipper Zero sniff Bluetooth Low Energy? Here's what its BLE radio does out of the box, what community firmware adds, where it stops, and how it compares to a phone or a dedicated capture dongle.
BLE Sniffer on Android vs. iOS: why the two apps differ
The iOS version of BLE Sniffer is missing things the Android one has — no MAC addresses, no background scanning. Here's exactly what differs between the platforms, and why each gap is an Apple constraint, not a shortcut.
Why Bluetooth addresses change: MAC randomization explained
The same device shows up under a new Bluetooth address every few minutes, and scans fill with duplicates. Here's how BLE address randomization works, the four address types, how to read them, and how to track a device anyway.
Bluetooth RSSI to distance: why it's not a ruler
RSSI is the only distance clue a BLE scan gives you, and it's a bad one. Here's the math that converts RSSI to meters, why the answer is routinely off by 2–3×, and how to use signal strength to actually find something.
// FAQ
Bluetooth sniffing, answered.
- Is BLE Sniffer a Bluetooth packet sniffer or protocol analyzer?
- Not in the link-layer sense. BLE Sniffer is an advertisement scanner: it captures the public advertising packets that nearby Bluetooth Low Energy devices broadcast — their name, Bluetooth address, signal strength, manufacturer, and service UUIDs. Following the channel-hopping traffic inside a live connection is a separate job that needs dedicated capture hardware. Bluetooth packet sniffer vs. scanner
- Can I use it like a Flipper Zero BLE sniffer?
- For Bluetooth Low Energy advertisement scanning, yes — a phone and a Flipper Zero both read the advertising packets devices broadcast nearby. Neither captures the traffic inside established BLE connections; that needs a dedicated capture radio such as an nRF52840 dongle. Flipper Zero is a trademark of Flipper Devices Inc.; BLE Sniffer is independent and not affiliated with them. Flipper Zero as a BLE sniffer
- Does it work as a Bluetooth scanner on iPhone?
- Yes — there is a BLE Sniffer app for iOS as well as Android. iOS restricts more of the advertisement data than Android does; most notably, Apple's Core Bluetooth framework never exposes a device's hardware Bluetooth address to apps. The two apps differ for that reason. BLE scanning on iPhone
- What can a phone Bluetooth sniffer actually capture?
- The advertisement layer: for each discoverable device broadcasting nearby, its name (when broadcast), Bluetooth address (on Android), RSSI signal strength, the manufacturer identified from its company ID, and the service UUIDs it advertises. It cannot read the contents of encrypted connections, devices with Bluetooth switched off, or Classic Bluetooth (BR/EDR) audio devices. What a BLE sniffer is
- Is it free? Are there ads or tracking?
- BLE Sniffer is free. It has no ads, no accounts, no in-app purchases, and no analytics, advertising, or crash-reporting code. The app sends nothing over the internet — scan logs stay on your device unless you export or share them yourself.
- Can it sniff Classic Bluetooth (BR/EDR)?
- No. BLE Sniffer captures Bluetooth Low Energy advertisements only. Classic Bluetooth, used by many wireless headphones and speakers, is a separate radio protocol that mobile scanning APIs do not expose the same way.
- Is Bluetooth sniffing legal?
- Passively receiving advertisement packets that devices broadcast publicly is generally low-risk, because the data is transmitted openly. Connecting to or interacting with devices you do not own or are not authorized to test is where it becomes legally and ethically fraught. Scan freely; only probe devices you own or have permission to assess. This is general information, not legal advice.
// Get in touch
Questions, bugs, or feedback?
Send a message and it lands directly with us. We read everything. We don't add you to a list, and we don't share your address with anyone.