As one of its daily deals, B&H Photo-Video offers the Polsen iOS Audio Interface, model no. IAI-500, for $19.99 with free shipping. That's $20 off and the lowest total price we could find. It connects to your iOS device via its 1/8" input, allowing it to work with a variety of recording apps. It features an XLR microphone input, 1/4" instrument input, 1/8" headphone output, and adjustable microphone input level. Deal ends today.