表面レベル、角度（分度器）、ルーラー、ストップウォッチ、スコアボード。
GS Toolkit is a new generation smart toolkit.
Surface Level :
You will find surface down area easily.
The bubble moves suface down area
This might be the most beautiful and accurate level you can get in hand.
Unlike some other levels in Android Market, this one is fully functional with calibration capability. It's accurate after calibrated.
Protractor :
This Protractor tool is a very smarer tool
This tool contains new features.
Find angle from live images.
Score Board :
This tool is useful for score counting, Like Tabele tennis, football, bosket ball etc....