G-Sensor vs. Accelerometer... difference?

[Miami_Son]

Accelerometer and G-sensor are NOT the same as it applies to phones. The LG Incite (my last phone) has an accelerometer, but could not use programs or games designed for a G-sensor. The TP2, Tilt 2 has a true G-sensor. An accelerometer can only detect whether the phone is in portrait or landscape mode, basically it reads the phone orientation in 1 plane (horizontal or vertical), whereas a G-sensor reads orientation in 3D. It can tell if the phone is horizontal or vertical and by how many degrees each way and side to side.

Both terms are actually misused in this application. An accelerometer or G-sensor is a device used for measuring movement, particularly velocity and deceleration, not orientation.