Arty

Arty is the photo editor for artists.
Unlike other photo editors, this app stays with you beyond just applying a filter. Use it to create accurate line drawings, zoom in to details, pick out colours and even track how long you've been working on your project.
ALL FEATURES:
▸ Compare your photo reference to your artwork using your iPhone or iPad camera
▸ Colour matching
▸ Faber-Castell Poloychromos
▸ Prismacolor Premier
▸ Caran d'Ache Luminance
▸ Create a colour swatch to keep track of colours
▸ Filters specific to an artists' needs
▸ Graphite
▸ Outline
▸ Posterise
▸ Shadows
▸ Vibrant
▸ Sepia
▸ Pointillism
▸ Stipple
▸ Pixels
▸ Overlay a grid
▸ Choose the size, opacity and thickness
▸ Choose the grid colour
▸ Full screen mode
▸ Turn your iPhone or iPad into a lightbox and trace the image
▸ Print image variations directly from the app using Apple's AirPrint
▸ Includes any filters and grids you've chosen
▸ Track how long you've been working on the project
▸ Zoom and pan around your image
▸ All settings are saved automatically