RotatorSurvey is a free online software that helps you to accurately measure your rotator cuff muscle. The software is very simple and easy to use, in fact it is extremely user friendly. You can download the program and start testing your muscle and get an idea of what is the correct measurement of your shoulder. You can test your shoulder through an exercise called "Shoulder Tap Test". This exercise has been scientifically designed to determine if your shoulder pain is from a poor range of motion or if it is from an injury to your rotator cuff.
RotatorSurvey has a free trial version that is completely ad supported. There is no doubt that many people would be eager to try this program, however because it is an open source program it is not possible for free to test it. This means that those who want to try the program must pay for the test. There are very few free trial versions, so if you are looking for one you should be willing to spend money to have a trial. If you want to get the best deal on the software you will need to sign up for a paid version. This can be done by registering with their paid versions that are offered for a small amount of money.
The only way to get access to the free version is to register. In addition to this the software comes with an "evaluation tool" that will tell you if you have a normal to good shoulder or if you have an injury to your rotator cuff. It can also tell you the depth of your muscles and the range of motion that you have, the rotator cuff length and many other things.