ArtStudio is a professional drawing / painting application. It uses advanced mathematics to attain the highest level of quality, at the same time offering incredible performance achieved through numerous code optimizations.

FORUM/gallery:
http://flickr.com/groups/artstudioimages/

Thanks to Corliss Blakely (http://www.artistinvermont.com) for beautiful paintings created by her in this app.

iPad features

- flexible canvas size, max: 2048x1536(iPad 1), 2592x1936 (iPad 2), 2448x3264 (the new iPad)
- support for any device orientation
- 15 tools: select, pencil, wet paintbrush, dry paintbrush, spray, dots, eraser, smudge, bucket fill, gradient, text, clone, blur/sharpen, dodge/burn, eyedropper
- 300 HIGH QUALITY BRUSHES (150 free, 150 paid) divided into 20 groups
- custom brushes, max size: 500x500px
- select tool: rect/ellipse/lasso/magic wand/by color, add/sub/intersect, contract/expand/round corners/border/...
- text tool: over 150 system fonts, support of external TTF fonts (just upload .ttf file in iTunes using File Sharing), special text layer to easy edit text
- favorites list to quickly access user's favorite brush settings
- fully customizable stroke settings: blur, flip, size, opacity, spacing, fadeout, squeeze, angle, speed-size, speed-opacity, random flip, scatter, jitter-spacing, jitter-angle, jitter-size, jitter-squeeze, jitter-opacity, jitter-hue, jitter-saturation, jitter-lightness
- simulated brush pressure, support for bluetooth stylus pressure sensitivity (currently only Jot Touch)
- symmetric drawing
- shapes: lines, rectangles, ellipses, polygons (open, closed)
- layer options: add, duplicate, merge down/visible, delete, lock alpha, show/hide, link, name, reorder, opacity, blending modes
- layer masks
- layer/selection transformations: move/scale/rotate with multi-touch, flip, rotate left/right, fill/erase
- 10 layer blending modes: normal, multiply, add, difference, screen, overlay, hue, saturation, color, value
- import from 'Photos', camera, iTunes, clipboard
- export as JPG/PNG/PSD to 'Photos', email, clipboard, iTunes
- multi-touch navigation with unlimited zoom
- undo/redo with almost infinite number of steps
- image resize (none, bilinear, bicubic, lanczos interpolations) , change canvas size, crop
- 15 filters: gaussian/motion/radial blur, sharpen, unsharp mask, add noise, render clouds, edge detect, border/vignette and more
- adjustments: brightness/contrast/exposure, hue/saturation/lightness, color balance, temperature, shadows/highlights, CURVES, auto contrast/colors/white balance and more

iPhone features

canvas sizes: 320x480, 342x512, 512 x 512, CUSTOM (min: 16x16, max: 512x512) - all devices
canvas sizes: 320x480, 640x960, 1024x1024, CUSTOM (min: 16x16, max: 1024x1024) - iPhone 3GS, iPhone 4 and 3rd gen iPod Touch
Retina Display support
30 BRUSHES including pencils, brushes, WET BRUSH, eraser, smudge tool, bucket fill (simple and smart mode, erase mode), glow, tube, airbrush, 1px and many more…
TEXT TOOL (44 fonts, settings: normal/bold/italic, left/center/right alignment, size, opacity, color)
SLOTS TO SAVE 20 brush presets (with names)
start with empty image, image from iPhone gallery or image from camera
17 DRAWING LESSONS (animals, human, 3d, perspective)
DODGE/BURN (shadows/mid-tones/highlights; normal/colorize)
advanced settings offer 12 different parameters (size, opacity, fadeout, spacing, jitter, speed-based thickness, hard edge, erase mode and more) and real-time preview
simulated brush pressure
line smoothing, antialiasing, zooming with filtering
symmetric drawing - horizontal and vertical
shapes: line, rectangle, ellipse, polygon (open and closed)
very comfortable interface; screens can be displayed in simple or advanced mode.
quality and performance unmatched by any other app in the app store
5 layers with options: add new / delete / reorder / duplicate / merge / clear / transparency / visibility
layer transformations: rotate/move/scale/flip with multi-touch, with buttons to precisely set these parameters
9 layer blending modes: normal, multiply, add, screen, overlay, hue, saturation, color, value
preserve transparency layer mode (so you can draw only on the visible contents of a layer)
copy/paste layer between projects
multi-touch navigation with unlimited zoom
tap-and-hold to enable eyedropper
two modes of eyedropper: sample current layer/sample all layers
advanced color editing with customizable color swatches and real-time colorized RGB sliders
undo/redo system, with almost infinite number of steps
filters: b&w, sepia, blur, sharpen, edge detect, posterize and more
adjustments: brightness/contrast/exposure; hue/saturation/lightness; red/green/blue;
load/save/export to iphone gallery / import from gallery / get from camera / send by e-mail
additional "shake menu" with the most frequently used functions
online in-app gallery