Rakuten Link is a free app that lets you make phone calls to other Rakuten users.

You can use it on your smartphone or tablet and you don't need to have any special access to the device you want to make the call on. Call your family or friends without having call charges! The app is free to download and use.

The interface is easy enough to understand so even people who are not much into tech can conveniently access the tool.

Download and install now!