The app to quantify the gravitational acceleration you are receiving. For use in the science class. Function: - Measure the gravitational acceleration and plot on the display in real time. - If it exceeds the limit, it will notify by the sound. - The limit and sound can be changed. - The data can be exported in csv format. - The app is keeping display on or running in the background during the measurement. - The notifying sound can be created by the recording function. The maximum length of the sound is 1sec. Note: - If you want to hide the advertisement or use the recording function, you need to select the No Advertisement from menu and watch the free ad video. - This app uses the Apache 2.0 license library - AChartEngine. (http://www.apache.org/licenses/LICENSE-2.0)