Already in use on iOS, Card.io offers a lightweight alternative to Google Wallet, using your phone's camera to glean payment details; and it's now winging its way to your Android phone. It may not have that phone-tapping appeal of Google's contactless payment system, but the app SDK (available now) skips the laborious process of entering your details number-by-number, booting up your camera and delivering your precious banking details to third-party merchants. You can check the video after the break for a (really brief) walkthrough, or click on the source below to give the Android demo a go.