Introduction: Five times sit to stand test is used as s measuring tool for determining motor abilities of elderly people. Originally, the test was used to determine the strength of lower limbs. Now is also used for indirect assessment of posture and balance. So it is easier to find risk individuals. The problem arises from different test implementations. Purpose: The purpose of the study is to determining the repeatability and reliability of the Five times sit to stand test, measured with mobile application »Test to go«. Methods: The study involved 32 students, 3 male and 29 female, both on average (standard deviation) 21.2 (0.8) years old. We made two measurements, which were 48 hours apart. At each measurement subjects had three attempts. From the given results, we calculated interclass correlation coefficient (ICC) with the 95% confidence interval. Results: Interclass correlation coefficient was only 0.44. Total ICC from the second and the third measurement was higher than the overall measurements, in which the values are between 0.60 and 0.66. 95% confidence interval is very wide, ranging from 0.11 to 0.68. All the measured values are very different. Discussion and conclusion: The adjustment results show that the Five times sit to stand test, which was implemented using a mobile application, is an unreliable measurement tool. It is necessary to add a pilot test. Thus, the patient experience after the first attempt could be strengthened in the following ones.