"Pathsense has written code that turns your phone into a navigation device similar to what's found on a submarine."
"We are using inertial navigation, so we are using things like the gyro, magnetometer and accelerometer and other sensors and these are things that are able to run even when the CPU on the phone is not on," Tenereillo said."
"Without the CPU running, the phone uses 90 percent less battery than GPS, giving people the ability to run location services on multiple apps like Facebook and Twitter and a dozen others at the same time without draining battery."
"Ironically, thanks to satellite data, an accurate map of planet Earth now exists. Pathsense utilizes those maps and uses the phones sensors to take the satellites out of the equation."