There are many Voice and Video calling Apps for out smartphones and Tablet, whether it is Android, iOS or Windows Phone. But they all work on internet, while few of them also require a huge dollars if you want to make calls to mobile or landline numbers without internet. Here is a new service using which you can make voice calls without internet at the fraction of dollars. I am talking about Ringo. It is an International calling app for all three mobile platforms (Android, iOS and Windows) that offers you upto 70% cheaper call rates than any other telecom providers. This is because the app converts you internal calls actually into local calls and route it via telecom operators. It also offers you highest call quality, no disturbance. For every new user, Ringo offers First call completely Free. So, go ahead and download it right away from here.