Autodesk Inc. spent almost 30 years selling engineering and design software to accumulate 12 million customers. It took a single iPhone app -- and less than two years -- to attract 7 million more.

Adobe has updated its free sketchbook app, Adobe Ideas, adding the ability to create photo layers, a Redo function, iOS 4 multitasking support, and more. Adobe Ideas, a combo app for both the iPad and ...

The Iconfactory is today launching Linea, a straightforward digital drawing app. It’s available now for iPad in the App Store for $9.99. With only four brushes and a maximum of five layers, the app ...