G-Meter Free

This app will measure lateral acceleration in G and draw a graph on your screen.

This app will measure lateral acceleration in Gs and draw a pretty graph, as well as measure the acceleration and deceleration you and your faithful phone are experiencing (be gentle to it!)

WARNING. This app may not work on some of the older phones due to the lack of acceleration sensor, or due to the unsupported format of data returned by the sensor. Before hitting it with a 1-star rating, please send me a quick note with your phone model, and I will see what can be done.

This was originally intended for automobile racing events, so people could record their highest Gs and then brag about it to their buddies. Who cares about lap times when you pulled 0.23 of lateral G more in that corner over there!

The absolute maximum values will be recorded at the bottom of the screen, and could be reset by clicking "Reset" button. This is done so that you could concentrate on actually driving and then checking your results after you're done. Please don't operate the phone while preoccupied with other activities.

The phone is intended to be attached to the car vertically, how you would normally mount it if used for gps/navigational purposes. Hand-holding the phone will very likely affect the recorded Gs in most amazing (and inaccurate) ways.

The phone will hold the screen on while the app is running.

Have fun, keep the rubber side down, and please do leave some comments, the app will be improved and expanded as the time goes.

The scale of the graph is adjustable since version 1.9 and up. There is also an optional audio threshold that can be set up once the Gs reach a certain level.

Please note: if the app says that invalid sensor data is returned, please try to re-calibrate your g-sensor (Settings/Display/G-sensor calibration). If that menu is unavailable, your phone may not be equipped with a g-sensor.

The app has been tested on:

HTC One V, One S, One X, Desire

Galaxy SII-III, Nexus

LG Optimus

Motorola Droid 4

ony Ericsson Xperia Ray, Xperia Z2

Star W007

Samsung Galaxy Exhibit II, Galaxy Ace, Galaxy Note II

Alcatel One Touch Scribe 8008 HD

If you downloaded this app and it works fine on your phone, I would greatly appreciate a quick comment with your phone model, so I could update the list above. Thanks!

What's New in the Latest Version 3

Last updated on Nov 9, 2015 As requested by Hannes (thanks!), an option to save a run has been added. Click REC button to start recording, and click it again to stop recording and save. Review it later by clicking "Show" button. Long click on the run to have an option to delete it.
As requested by Ryan (thanks!), 3.0 is now officially completely organic, with the graph carefully hand plotted by our artisan plotters using crayons made of dye harvested from free range cochineal beetles.