We have introduced Inspire Pro iPad drawing app, but if you use iPhone, its iPhone app may be more suitable for you.
Of course, Inspire for iPhone is also a powerful drawing app developed by KiwiPixel. Inspire features five realistic paint brushes, including flat brush, round brush, fan brush, palette knife and clumped brush. Each brush allows you to adjust the size, direction for different effects, and you can also select suitable canvas from 320 x 480 and 480 x 480 (4th generation devices: 640 x 960 and 960 x 960), while the 200 (4th generation devices: 1000) levels of undo and redo, and various brush pressures let you create great artworks. After finishing your work, you can save it in its built-in gallery, export to Photo Library, or share with friends via Flickr or email. Apart from that, Inspire also supports Retina display.
Inspire with a size of 5.4 MB is compatible with iPhone, iPod touch and iPad running iOS 3.0 or later. At present, the iPhone app is available for free ($4.99 regular price). If you’re interested, jump to App Store for more details.