A free program for Android, by The AppGuru.

Bluetooth Contact Transfer is a simple and convenient way to transfer contacts between two devices, regardless of whether they are the same phone or not. The app allows you to select all or individual contacts to save to your phone.

The app also supports all the major phone models, including the latest Android. It works on all Android devices with a Bluetooth chip and can be downloaded and installed for free.

How to use it?

Install the app and open it. The app will search for available devices, then select the device you want to pair after searching. Select the contacts you want to transfer.