Adobe Photoshop Sketch is a surprisingly rich and fluid drawing tool for Android phones and tablets. With this free app, you can create and share sketches right from your mobile device or send to your desktop to finish your work in Adobe Photoshop or Illustrator.
Range of drawing tools: Pick from pencil, pen, marker, eraser, and brush drawing tools to make your sketch. You can sketch with your finger or use a pressure-sensitive pen.
Customize your drawing tools: Tap a tool to change its size, flow, and color. Press and hold the size circle, then drag up or down to set the size of the tool. To control flow -- the rate at which color builds up as you use the tool -- press and hold the flow circle and drag up and down. And to set a color, tap the color circle and then tap on the color wheel or select a ready-made color theme. To copy a color, press and hold the color circle to bring up an eyedropper tool. Tap the revert arrow at the top of the screen to step back through your changes.
Work with layers: Build up your drawing with sketch or image layers. With layers, you can blend colors, with the color on one layer mixing with the color used on another layer. You can control opacity and blend mode, transform the layer, and duplicate it.
And work with shapes: Tap the shape menu at the top to add lines, basic shapes, polygons, and French curves to your sketch. You can either trace along the edge of a shape or double-tap it to add it to your image.
A little fiddly: Setting the various attributes for the drawing tools takes a bit of trial and error to get size and flow exactly as you'd like.
Adobe Photoshop Sketch lets you doodle, sketch, and create artwork right on your Android phone or tablet, using your finger or pen. It's not a professional-level tool, but this free app offers enough depth to produce rich drawings you can share or send to Photoshop or Illustrator to polish.