InterVoip is a free Android app developed by Finarea that offers an easy and safe alternative to your regular phone provider. With InterVoip, you can reduce your phone bill drastically by making national and international calls through VOIP and local access numbers. The app also allows you to send text messages (SMS) and become a reseller of InterVoip credit.

To get started with InterVoip, simply download the app on your phone, Windows PC, or Mac, create an account, buy credit, and start making calls at cheaper rates than your regular service can offer. However, it's important to note that using InterVoip as a default dialer may interfere with dialing 911 emergency services.

Overall, InterVoip is a great option for those looking to save money on their phone bills and have access to a variety of communication features.