At the moment, there’s no free version of AudioStretch for iOS. I used to have a free download with a two-minute time-limit that could be removed via an in-app purchase, but I found that approach was problematic for a bunch of reasons I won’t get into here. I ended up switching to a regular paid app: you pay once to install.
Unfortunately this switch meant that few people could no longer try the app before buying. In an attempt to partially address that, I’ve created a simulation of the iOS app entirely in Flash which runs in the browser of any reasonably fast PC or Mac. It looks like the real iOS version, and implements a lot of the essential features of the real thing. It even has the LiveScrub™ waveform dragging feature.
It not as good as the real app of course. For one thing, in Flash the audio output has considerable latency, which means that there’s a fair bit of delay between actions (for example hitting the play button) and when sound actually starts going out the speakers. The latency is not too bad on Mac; on Windows it can be substantial. On iOS, there’s basically no noticeable latency – you drag the waveform, and it plays perfectly in sync. Another big difference is file formats – the Flash version only supports mp3 files (which must be on your local drive), whereas the iOS app can handle pretty much anything iTunes can – wav, aiff, mp3, m4a/aac. And finally, there are loads of features in the iOS version that are not in the Flash version, notably the keyboard/spectrum display.
Despite these limitations, I hope you’ll find it pretty cool 😉