A free app for Android, by Dr. Johann Gaus.
Hifi-Apps Speaker Setup 2 is a handy tool for your Android device. It is designed to help you to set up your speaker and test its capacity. The app provides an easy-to-use interface and works with a microphone. It will measure the sound pressure level at your listening position. This is done in a way that is very easy to understand!
After the measurement, the results will be presented in an easy-to-read graph. The app also provides you with the necessary information about the results, such as the level, the frequency, the sound pressure level, the sound volume, and the distance.