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