This app can use only iPhone4!!
This application can measure length accurately.
The feature of this application program is to be able to measure the measured one without trouble the horizontal even if it has inclined.
It is possible to measure it even if inclining though it is suitable for side.
However, there is a problem in accuracy about the measurement of 1m or more.
If iPhone is previously devised as fixation etc. , the stick to understand length can be measured even by a long distance.
Because the angle is displayed as an extra, it is possible to use it instead of the protractor.