All vertical and horizontal? The bubble leveling tool is perfect to see whether a surface is horizontal and vertical. The bubble level set in motion by the accelerometer sensor or you can calibrate the x and y angles, if you press the desired calibration buttons. Design your water balance and background color. Tap several times to the desired color selection to save your settings. So each picture hangs horizontally and your furniture to be upright with your own bubble scale tool!
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for Android