LightBlue®

LightBlue®

The go-to BLE development tool

936 ratings
289 reviews
Free
With Ads

Details

  • Released
  • Updated
  • September 8, 2012
  • May 5, 2026
LightBlue® screenshot #1 for iPhone
LightBlue® screenshot #2 for iPhone
LightBlue® screenshot #3 for iPhone
iphone
ipad
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About

This app allows users to interact with Bluetooth Low Energy devices. It supports scanning for, connecting to, and analyzing BLE peripherals, as well as simulating your own BLE devices. It's a comprehensive tool for developers and enthusiasts working with BLE technology.

Scan and discover BLE peripherals
Connect and view device profiles
Read and write characteristics
Subscribe to notifications
Create and advertise virtual BLE devices
Clone peripheral profiles
Log and share BLE events
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What users say

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What's New in LightBlue®

5.3.6

May 5, 2026

New Log Filtering and Bug fixes.

User reviews

Inaccurate

Found my thing but bc it was my memory. 98 when I was in the same room with it.

Found my oura ring!!

Great app!! Helped me find my Oura ring!!!

Complete lies

Preview images show names of devices, which it in-fact does not do, you have to name them manually.. lets not even get started on its scan or connect for device alone, 5ft away from a device with bluetooth and it doesn’t even show up in the app at all, and dont even get me started with a smart watch, it doesnt even see that and thats less then 2 feet away at any time..

Completely broken with absolutely no point to the app other then seeing your device names(once input manually)
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The app does not work

Lost my Fitbit while out hiking. Found out on the Fitbit app that there is no good way to locate it. The best suggestion they had was to see the last time it synced. These days it always tries to sync so there’s no record.

This app was mentioned in the Help files as a solution for iOS users. After walking for hundreds of yards, I started to doubt that this was even doing anything. Why not just open iOS settings, and look at my Bluetooth device devices that are connected?

Eventually, I found my watch on the trail. That was with my own eyes. The iOS settings did indicate a connection. Went back to LightBlue to test it, toggled, a few buttons, no indication at all!

Dvlpr:
Please reach out to Fitbit to remove this as a possible solution, finding one
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Helped me find my lost FitBit!

I lost my FitBit in my house and the forums suggested this app. You do have to keep connecting to it as they don’t maintain a steady connection but it led me right to it.
Fantastic for helping you track down your devices and free too!

Developer apps

User experience

🐞

Reported Bugs

3 issues

Crashes after updates

Bug

Fails to connect Apple Pencil

Bug

Doesn't detect all nearby devices

Bug

Requested Features

3 requests

Ability to manually name devices

Feature

More precise location tracking

Feature

Integration with Siri/Shortcuts

Feature

FAQ

What does the LightBlue app do?

LightBlue is a tool designed for interacting with Bluetooth Low Energy (BLE) devices. It allows you to scan for and connect to BLE peripherals, inspect their services and characteristics, read and write data, and subscribe to notifications. It also enables you to simulate your own BLE peripheral devices.

What are the key features of LightBlue?

Key features include scanning for BLE devices, viewing device information like UUID and RSSI, browsing services and characteristics, registering for notifications, reading and writing characteristic values in various formats, cloning peripheral profiles, creating custom virtual peripherals, and logging BLE events.

Is LightBlue free to use?

Yes, the app is free to download and use. It is supported by advertisements, which are displayed within the application.

What kind of devices can I test with LightBlue?

You can use LightBlue to test a wide range of BLE devices, including heart rate monitors, temperature sensors, development boards from manufacturers like Microchip and Nordic, and custom BLE peripherals you are developing.

How can I use LightBlue to test my own BLE firmware?

LightBlue is ideal for testing your own BLE peripherals. You can advertise your iOS device as a custom BLE peripheral, define its services and characteristics, and then use the central mode to connect to and test its functionality, ensuring your firmware behaves as expected.