As a bit of experiment, I have been taking my new iPad to my life drawing sessions. In the past I have made colour studies of the models in oil paint, but the finished boards are never easy to transport, without getting oil paint everywhere! For this study I used the Brushes app. The result is a little soft, but I love the amount of colour that is available for use.
This portrait was done using the Sketchbook Pro app. I prefer this one as the brushes are more controllable and the blending better. I also like being able to add photos into the layers, meaning that I could incorporate the fabric that the model was standing on as a backdrop to the painting.