I wasn't sure exactly what INKredible was all about when I first sat down to use it. It turns out that this free app (with in-app purchases) is a really useful note-taker for writing directly on your iPad to make easily edited notes.
After launching INKredible for iPad the first time, you're greeted with a quick tutorial, and then you are presented with a blank, distraction-free page. Controls and buttons are visible with a swipe.
Your pen strokes are vector graphics, so print-outs look truly detailed without stair-stepping jaggies. At first, using your finger (or stylus if you prefer) seems a bit awkward, but after a couple of minutes, it feels completely natural. The app has a feature called "automatic palm rejection" that works in stylus mode so your palm or wrist can be on the screen and not mess up what you are writing. A stylus is not required in stylus mode -- you can still use your finger.
There are status indicators at the top of the screen to let you know what mode you are using. Sketches are easy if you are so inclined, so it's a nice app for creating simple drawings, although there are no built-in shapes. Everything is drawn freehand. Fortunately, there are unlimited undo and redo options.
Pages are flipped by swiping. You can highlight text or a drawing and drag it elsewhere on the page or delete it.