You may be right. Basically, I can call all the countries I need to like India, UK etc., so I dont care to check. We have Vonage for more than 3 years. Originally we got it for like $15/month for some promotional period. No one at our home checks the bill. The amount is insignificant to the number of calls I make. Even if I was paying $200/month, it will be cheap for me.
The app thingy is like a year old or something. It works in a weired way. My son downloaded it and I never checked what it is. If I make an international call from my cell, then first it dials my homephone and then uses my landline to complete the call. I dont care how it works, as long as it works for me.