VoX Communications announced Monday a new unlimited calling plan to Canada, for just $6.95 per month. It's another aggressive move by VoX in their continued bid to make inroads into the hotly contested mobile market. Their new rate compares favorably with those of their biggest rivals, including Skype, Vonage, and Verizon.

The VoX Android app allows users to get a real phone number anywhere in the U.S, with paid plans starting at $4.95. Users avoid the massive roaming charges of other mobile phone providers when making calls abroad, and can configure their other SIP accounts with the app as well. The VoIP service has been lauded for its impressive call quality that rivals traditional phone services.

"We continue to add creative and very competitive calling plans to our Android app. With both Yahoo and our UK marketing partner launching marketing campaigns, we are very excited by where we are as a company today. With summer travel and the London Olympics coming, we intend to heavily market our app in July. We are also happy that Google recently reported that more than one million new Android devices are activated each day and we predict that this number will rise to over three million units a day by 2015. People are finally seeing the attraction of mobile VoIP apps that allow them to avoid massive roaming charges when travelling and to make a Wi-Fi call from anywhere in the world. They can now use VoX without using their carrier minutes or worrying about roaming charges" said VoX's Chief Marketing Officer, Barry MacCheyne in a press release.

You can read more about VoX's VoIP service or give it a try yourself by downloading the Android app here. VoX offers a free 60 minute trial of their service, which includes free calling anywhere in the world.

What is your preferred VoIP or phone service at the moment? Have you given VoX's Android app a try, and if so, what did you think?