If you really had reason to encrypt your phone calls — or were on the payroll of the MI6 — perhaps a $1,600 yearly subscription to a cell phone call encryption app service would make sense.
Otherwise it’s hard to see the value in paying that to use app Cellcrypt Mobile, which promises that it is up to the U.S. government’s 140-2 Federal Information Processing Standards, so even government employees for certain classifications of information could use it. It can be used to call over 200 countries.
“Cellcrypt Mobile uses encryption algorithms that are recommended for military and government secure communications and its secret keys never leave the mobile device. The product has been tested by third parties and validated to several government standards including US NIST FIPS 140-2 (certificate #1310) for its cryptography and UK CESG Claims Tested Mark for its product implementation.”
While the app is free to download, both the caller and the receiver have to join the service that costs several times more than their phones.
Via App advice.