Turns off the on-board radio equipment when it considers that it is no longer useful, and after a while turns it on back. Thus, reducing the exposition dose of microwave radiation on the pants pockets and all around.
Are you already using a cap of foil? Then you just need to install the application now. While science is wondering about safety of microwave radiation, all the humanity bears constantly working mobile phones with two or three radios at 900 MHz, 1200 MHz, 1800 MHz and 2.4 GHz. Strange it is, it's humanity - no one comes to mind to poke the eggs in a microwave, but poking microwave (ie, telephone) into his pants pocket - common sense.
If you are concerned about the future of your internal (and external) guts, use this program and reduce the exposition dose of microwave radiation by the cost of missed calls.
Yes, it is a snakeoil. Exactly in the sense that not everybody will find it to be helpful, and that there is no scientific ground on it's function.
If you want to get it free - you might consider helping with the translation. :)