Free Conference Call HD is a conference calling app that allows you to make calls to your friends and family using your Android device. The app lets you make calls using your regular phone number and even to people who have their phone number registered with a different number. The app will automatically fill in the other party's information, such as their phone number and email address.

Once you have created an account with the app, you can make calls and send messages to other users. The app will automatically send an invitation to the other party when you call or message them. You can also add the other party to your contacts list to easily reach them.