This app is pretty amazing for the price. Yes there is a small delay in processing but do you realize what this app is doing in real time? Its analyzing your pitch, correcting it, AND building a harmony, AND replicating your voice in 4 part harmony IN REAL TIME! On an iPad!! And doing a really decent job of it... For $3.99? Incredible!
Id like to see more control over the harmony structure options, more scale options, and maybe an offline mode that will take a mono recording and render a better quality output. Pro software that does this kind of thing more cleanly and faster is in the hundreds of dollars and uses a lot more CPU. But this is great for fun and parties, and even could have a place in a semi-pro production. Nice work ImproVox!