The keystone of effective and precise forest management is the availability of appropriate data, based on this; foresters can make the best decisions. Precise and efficient measuring equipment is necessary to get precise and reliable data. The MobileForester uses high tech sensors and an intelligent algorithm to provide data for tree height, tree diameter, volume of the logs or stack, and it can measure the forest stock volume on a forest site. The new equipment is very easy to use, much faster than traditional measuring methods. The MobileForester provides a revolutionary new method for determining the tree diameter distribution which is important for continuous forest cover management. It makes the analysis and shows the data in both a table and as a graph. This function determines the amount of trees which have to be cut and can calculate the diameter distribution which have to be cut for the optimal distribution.