myRaumklang - Nachhall messen is a free Android app developed by myRaumklang under the category of Multimedia, specifically Music & Radio. The app aims to optimize the acoustic properties of a room by measuring its reverberation time. A good room acoustics is a crucial factor for a comfortable working and living environment. The app provides tips for improvement based on the size and use of the room, which are calculated from four measurements. The results of the measurement and the suggested products for optimizing the room acoustics can be sent to the user's email address. This app is an excellent tool to visualize and solve the problem of long and disturbing reverberation, helping to achieve an optimal room sound.