Procreate (US$5.99) has long been the go-to app for artists wanting to use their iPad as a digital canvas. Today there's a new version of the app available for those who want the ultimate portable art studio - Procreate Pocket ($2.99) for iPhone.
Optimized for the iPhone 5, 5s, 5c, 6 and 6 Plus, Procreate Pocket features a dozen specially made brushes for concept sketching and illustration, but any of the thousands of custom Procreate brushes available online can also be imported for use.
The app uses the 64-bit Silica painting engine and 64-bit color for incredible accuracy. There are 250 levels of undo, and paintings are preserved with continuous auto-save. On the optimized devices, there's a 4K Cinema Canvas available to work on.
As with the iPad version, Procreate Pocket records every stroke made for a 1080p video of how your artwork was created. iOS 8 adds the ability to share your work as .procreate, PSD, JPG, or 24-bit PNG through iCloud Drive or AirDrop. For those of you with AirPrint-compatible giclée printers, your art can be printed directly from the iPhone.