Voloco features four effect presets:
Big Chorus — A seven-voice harmonization effect
Hard Tune — The classic "AutoTune" sound made famous by T-Pain and others
Natural Tune — Gentle automatic tuning
SuperVocoder — A pitched-down monster vocoder
If you hear nothing *even when a headset is plugged in*, then set More Options –> Settings –> Prevent feedback to OFF.
Voloco compresses your recordings as AAC in an MP4 container so you can easily share them.
Modern Rap Effects, WAV recording, one-touch preset change.