Sketchable is the best app for artists and people in journaling with a simple and elegant user interface and various useful tools. It is available in the Microsoft Store.

The app offers personalised step-by-step tutorials on how to draw a range of subjects, from still life to everyday objects to portraits of famous people.

That's right. There's an app -- called Doodle -- which turns the e-ink on the Kindle into the same hard-to-control lines you find on the frustrating magnetic drawing toy.