Systems, methods, and apparatuses may be used to test devices using a portable device. A portable device is a tablet computer, a smart phone, or other type of device. In embodiments, the different components of the portable device are utilized to perform tests on a medical device such as a hearing prosthesis or other type of medical device. For example, portable device components such as accelerometers, magnetometers, gyroscopes, microphones, speakers, etc. are used to provide testing stimuli and/or record the responses from the hearing prosthesis to the testing stimuli. The portable device is used to generate testing stimulus and record the response from the device being tested using the various components of the portable device. Analysis of the output of the medical device can be performed to determine a remedy to improve operation of the device.