nTalk is a powerful, easy-to-use, and free app to create and manage conference calls and video conferences with up to 15 people. It supports both mobile and landline phones, and allows you to initiate a call with one touch.

You can choose to create a new conference or join an existing conference. The app will automatically detect the number of participants and will also detect the type of phone (mobile or landline).

Once you're ready to start the call, just press the "Start Conference" button and the app will take care of everything. You can choose to use your own contacts or the contacts in your phone book. You can also add more than 15 people to the call if you wish.