This prospective study aims to evaluate the agreement, also referred as concordance, of the mymobilty knee ROM with a clinician's assessment of knee ROM via goniometer.

Inclusion Criteria:

• Patient is a minimum of 18 years of age
• Patient is willing and able to provide written Informed Consent by signing and dating the IRB-approved Informed Consent form

Exclusion Criteria:

• The patient is currently participating in any other study that would hinder the assessor's ability to measure knee ROM
• Complex primary knee pathology with significant restrictions on the range of motion per surgeon discretion
• Patient is pregnant or considered a member of a protected population (e.g. prisoner, mentally incompetent, etc.)

The study population will consist of a minimum of 41 patients who meet all the inclusion criteria and none of the exclusion criteria.