Aspect helps you to analyze your local audio files by building their spectrogram. Spectrogram will show the differences in the frequency range when lossless encoding an audio signal and when lossy encoding. For MP3 and OGG files, it is also easy to see the effect of the coding bit rate on the presence of high frequencies in the audio signal.
It's safe to download the app. Andrey Khromchenkov is the developer of Aspect which can be found in the Music & Audio category. Users rated the tool 4.4 on Google Play.