PhoneRa is a simple tool that does a simple job: it gives you the level of the Specific Absorption Rate (SAR) of your (next) cell phone/mobile phone. The latest scientific research seems to indicate that radiation from your cell phone/mobile phone could have a possible negative impact on your health. The amount of radiation varies per phone but it is generally assumed that the higher the amount of radiation that is emitted, the higher the amount that is absorbed in your brain while using your phone.