The easiest-to-use VOIP app returns with a complete overhaul of the user-interface and code under-the-hood. You can call up other iOS users, or users of the desktop (PC/Mac)...
CryptoVox Push-To-Talk makes powerful encrypted many-to-many walkie-talkie communications easy to set up, and completely secure. Just enter a unique "channel" ID, and share your encryption password...