Apparently not everyone has professional drawing skills, so if you also want to draw an amazing sketch styled works, LiveSketch HD should be a suitable free iPad app.
LiveSketch HD is developed by Yan Rabovik. As its name implies, the free iPad app is a very nice sketch app. Unlike some complex drawing app, LiveSketch features a simple interactive drawing interface, comes with 8 buttons and functions including Sketch and Erase, Trash, background, Undo/Redo, sketch color and export function. And LiveSketch HD uses some kind of unique algorithm to draw and erase, so even if you have no professional sketch skill, the free iPad app can offer you an increase sketch effect. After the break, check out the demo video.
Maybe LiveSketch HD is available for free during a limited time, because, the iPhone version is priced at $1.99 USD. If you’re interested, jump to App Store for more details.