Android App Available, Try now
If you need the "RVox sound" without the price tag, several free plugins replicate its simplified, "one-knob" vocal leveling logic:
Disclaimer: This is a time-limited demo. To continue using RVox after 7 days, a paid license is required.
Avoid any website offering a "cracked RVox.exe" or "Keygen." The Waves RVox uses modern copy protection; those files are 99% malware.