After the prototype application is complete and ready to use. We have to test about the usability. To test the usability test we let people to use an application and ask them to do the survey to get they feedback when people using a PostureErgo’s prototype application we will let the user trial prototype themself. To study their reaction of the application.Is the application is easy to work ?or it is too confuse to the user .We have to collect the complains from the user and analyze what we have to develop to make the application perfectly.