Sound Meter® turns your Phone into a professional sound meter, precisely measures the sound pressure level all around you. This extremely useful and beautiful tool will not only be a great tool for many uses but also bring you a lot of fun. Have you wondered how quiet is your room or how loud is a rock concert or sport event? Sound Meter® will help you answer all those right now. Most importantly, this tool is absolutely FREE and we commit to keep the price. If you satisfy with it, please support us by rating and giving us comments and feedback.