Validity and Reliability of iPhone Application in Internal Rotation Measurement

The IHandy® app is a free app with a visual display similar to that of the digital inclinometer in terms of digital size. In this study, due to its prevalence in the literature and its use in clinics, manual goniometer (gold standard) was chosen to be compared with this iPhone application.

While measuring with goniometer, the pivot point of the goniometer was placed on the olecranon, the immobile rod of the goniometer was kept parallel to the bed, while the moving rod was kept parallel to the ulna, the angle was recorded at the end point of the movement.