Vonage's new Time to Call app lets you make short, 15-minute calls to 190 countries with rates ranging from 99 cents to $9.99 per call. Payments are processed through iTunes, so you don't need to create an account with Vonage, giving the app a slight advantage over services from competitors like Skype -- for now, at least. The app works over WiFi everywhere, and 3G in the US and Canada, and you'll pay the same rate when calling both mobile phones and landlines -- so you could save quite a bit if you typically make short calls to mobile numbers. For casual callers, however, the app's most appealing feature is the free call you'll get after installation. We wasted it on a 30-second call to Tokyo that would've cost us three cents to make using Skype, so hopefully you'll be slightly more creative.