Step 1, Enter the height of one who measures.

Step 2, Please stand up straight. Align your eyes,cell phone, and object's bottom side in a straight line. Then click on the screen.

Step 3, Align your eyes,cell phone, and object's top side in a straight line.Then click on the screen again.

After the measuring procedure, results come out automatically. You can not only get the distance between you and the object, but also the height of object.