Multi-Frequency Tone Generator is an Android application developed by Roman Spiridonov, available for free in the Multimedia category under Music & Radio subcategory. The program features a Main Oscillator with a frequency range from 1 to 20,000 Hertz (Hz) and 4 sound wave variants. It offers logarithmic slider frequency settings, signal visualization, ready-made frequencies selection, and manual frequency adjustments with a 1 Hertz step.

The Modulator section includes a Multi-Frequency Generator with frequencies ranging from 1 to 1000 Hertz (Hz), 4 sound wave options, and the ability to add multiple signals while controlling individual signal volumes. Users can utilize this app to tune and test audio equipment, create unique sound effects by combining tone signals, test subwoofers with low frequencies, and assess hearing capabilities with frequencies exceeding 10,000 Hertz (10 kHz).