SPL Meter featuring RT60, Leq, Sone, Spectrum Analyzer, Spectrogram, Chart Recorder, Signal Generator, Polarity Checker, and Mic calibration. Recommended by "Sound and Vision" magazine. Loved by Audio Engineers worldwide: check out the Reviews!
It's free to get the installer of AudioTool, also, you can check out users' reviews on Droid Informer. The app runs on Android 4.0 and higher. This application is completely safe for downloading. Jjbunn created the tool that falls into the Music & Audio category.