surveying height calculation

Convenient if you met in the construction and building site! And it is seems app. Ding upholstery installation and leveling, even if not fill out the field book is okay! I will calculate in the app. First, I will collimate the standard altitude (KBM). Enter the value read at this time on the measured value (back), and calculate the instrument high Just after inputs measurements to measure the (Zhang Zhang point), to calculate the altitude If the plan sales of Zhang Zhang point is determined, and input the plan high ・・・ Calculate the Ding-clad height required. Because it is a calculator app that you enter in the vertical, repeat measurement value (Zhang Zhang point) I can easily input. There is also a registration function, it is if available handy app!