Measure the g-force on roller coaster or the acceleration of your car.

v9.81: facebook sharing fixed.

If you wonder how many g's that roller coaster reaches or how fast your car accelerates then Grav-O-Meter is for you.

It shows acceleration in realtime as well your highest ever.Measure gravity or how quickly you can move your arms. Just be careful!

Feel the g-force!

(NB this is not the Punch-O-Meter - an app of violence, this is the original and full-featured grav-O-meter the best way to measure your power).

DO NOT THROW YOUR PHONE!

DO NOT ACCELERATE IT BY WAVING YOUR ARMS WILDLY IF YOUR GRIP IS NOT FIRM!