Find Bluetooth - Last Signal

Last Signal is an app that helps you find a selected device by checking signals from nearby Bluetooth Low Energy (BLE) devices.

You can check the signal strength (RSSI) and estimated distance of nearby BLE devices such as earbuds, smartwatches, tracker tags, and other devices that transmit BLE signals. This can help you see whether you are getting closer to or farther away from the device.

[Key Features]

- Scan nearby BLE devices

Search for BLE devices detected nearby and check the device name, signal strength, estimated distance, and last detected status.

- Real-time signal tracking

Track signal changes from a selected device to see whether you are getting closer or farther away. Vibration and alert sounds can be used depending on the signal status.

- Estimated distance and signal strength display

Calculate the approximate distance to the device based on RSSI and distinguish between devices with strong and weak signals.

- Device alias settings

Assign easy-to-recognize names to frequently searched devices, such as “My Right Earbud,” so you can find them more easily later.

- Calibration and sensitivity adjustment

Adjust reference signal values based on device types such as earbuds, smartwatches, trackers, and general BLE devices. You can also calibrate distance sensitivity depending on indoor or outdoor environments.

- Local-first processing with privacy in mind

Last Signal can be used without creating an account. The app does not store Bluetooth scan results, location coordinates, voice data, or audio recordings on the app operator’s own server. Device permissions may be required for Bluetooth scanning and distance estimation.

[Before You Use]

BLE signals may vary depending on walls, furniture, people, battery level, device type, connection status, and the surrounding radio environment. The distance shown in the app is an estimated signal-based distance, not an exact location.

Last Signal is a tool that helps you check nearby device signals more easily and supports the process of finding a lost device.