Problem description A DistoX calibration device has been developed, encouraging me to test DistoX calibration with and without it. The report on findings is published in Glas podzemlja 2020 (in Slovene, also available here). File description The data is organised in this way: The folder "Raw" contains files exported from TopoDroid; The folder "Converted" contains manually converted data from the folder "Raw" in a file format more suitable for further processing. The column "Name" that names the instrument and the target locations is added manually. In the cases where TopoDroid joined similar measurements into a survey shot due to unsuitable settings and did not export them, they are read from the phone screen and entered manually. The folder "Organised" contains all the data that gets automatically processed by the program DistoX.R. It is the data from the folder "Converted" with possible manual corrections (measurement order in case of mistakes, measurement length in case of the beam bouncing from an obstacle before the target, etc.) and the file data_list.txt containing the list of the files to be processed with short descriptions (emphasising the manual corrections). The folder "Rest" contains notes that are neither automatically processed nor exported from TopoDroid but may be of interest. DistoX.R is the data processing program. Program DistoX.py draws a graph. The help of Marjan Baričič, Matic Di Batista, Gregor Pintar, Peter Prevec, Janez Strojan the Elder, Stephanie Sullivan and Rafko Urankar-Cile was essential for the work.