RT is an app with which you can determine an average of the reverberation time (or in octave) easy and free.
1. Start the application.
2. Press START.
4. Press STOP.
5. Send to "Yes" if the measure was successful.
To achieve optimum results, it is highly recommended to try to locate the device away from reflective surfaces and clap stick farther from the critical radius, so that the sound reverberated outweighs the direct one.
If the measurement time is too short, a message appears on the screen to indicate that.