This app enables low-price international calls from any Android device.

Why pay high rates for international calls when you can make them at a low cost? SmartVoip is a stellar tool for placing voice call over internet protocol. It uses WiFi and 3G signals to save you money.

To use SmartVoip, simply download it, create an account and buy calling credits. Next, log onto WiFi, and place a call through app's interface.

SmartVoip lets you save your contact list in the cloud, so you can make calls from multiple Android devices or from your web browser on your laptop. Awesome!