ToneBoosters Spectrogram is a free multimedia application available on Android. This software allows you to visualize the audio spectrum captured by your device's microphone in real-time. It comes with two visualization modes: a spectrogram and a spectrum analyzer. The app also displays keyboard notes, frequencies, and levels when you hover over the screen.

What sets Spectrogram apart from other audio visualizers is its stunning and informative display. The app offers dozens of color schemes, allowing you to customize the look to your liking. ToneBoosters Spectrogram is an excellent tool for music enthusiasts and professionals alike.

It is worth noting that ToneBoosters also offers a range of professional audio apps and plugins on their online store. However, Spectrogram is completely free and does not include ads or trackers.