The "Download Now" link directs you to the iTunes App Store, where you must continue the download process. You must have iTunes installed in order to open the link, and you must have an active iTunes account to download the application. This download may not be available in some countries.
From Eric Rasmuson:
AutoMic Infinity is an audio recording app that will record only when you want it to!- If you record for three hours but only speak for five minutes, then you will have a five-minute recording -- not a three-hour recording!- Append recordings: Start and stop recording, then come back to it and add on extra audio automatically.- Playback and seek through recordings inside the app.- Support for multiple recordings.- File sizes are optimized for voice recording, so you can record hours of audio on your device.- Export your recordings via email or iTunes File Sharing for playback on your computers or other devices.AutoMic Infinity requires a device that has a microphone, as well as iOS 4.0 or later.