**5. Conclusions**

The results of present research sugges<sup>t</sup> that smartphone app My Jump 2 is a valid, reliable, and useful tool for measuring jump height in recreationally active adults. Therefore, in addition to its a ffordable price compared with several available reference methods and given its simplicity and practicality, it can be used by practitioners, coaches, and recreationally-active adults to evaluate physical fitness with a robust and simple test as SJ, CMJ, and CMJAS.

**Author Contributions:** Conceptualization, Š.B. and N.T.; methodology, N.T.; software, S.A.; validation, M.P., S.A. and N.T.; formal analysis, M.P.; investigation, S.A.; resources, S.A.; writing—original draft preparation, Š.B.; writing—review and editing, N.T.; visualization, Š.B.; supervision, M.P. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research received no external funding.

**Conflicts of Interest:** The authors declare no conflict of interest.
