1. An image forming apparatus including an application for performing processes on image forming, and a system service for performing processes of a system side of the image forming apparatus on the basis of a request by using an API from the application, the image forming apparatus comprising: an obtaining part for obtaining version information of APIs used by the application for the system service, and version information of APIs of the system service; a comparing part for comparing, API by API, versions of the APIs used by the application with versions of the APIs of the system service.