As cool as the App Store can be, sometimes it’s the rejected applications that prove the most interesting.

Last week, the TechCrunch reported that Apple rejected an application that promises to measure and minimize a user’s exposure to cell phone radiation.

The application, which had been developed by Israeli company Tawkon, had spent 18 months in development with the firm looking to sell it for between US$5 and US$10.

“Our message is moderate, we don’t claim to try to stop users from using their phones,” said Tawkon co-founder Gil Friedlander. “We just say to do so responsibly.”

In rejecting the application, Friedlander was told by Apple the information about radiation levels provided by the application may be confusing for users despite an excellent interface. “They are very clear about the fact that they make content decisions about what they want to post or not.” An Apple spokesman reportedly declined to comment about the issue.

According to the company, Tawkon’s RRI patent pending technology alerts the user when radiation levels cross a predefined threshold and provides simple, non-intrusive suggestions to reduce exposure to radiation. The application leverages various smart-phones capabilities including the built-in Bluetooth, motion and proximity sensors, GPS and compass to determine the results.

The technology collects and analyzes your phone’s dynamic SAR (Specific Absorption Rate) levels, network coverage, location, environmental conditions and phone usage at any given moment to help determine those results.