An iPad or iPhone is incredibly handy for quick drawings in situ, making visual notes or even doing full scale paintings.  The English artist, David Hockney, was one of the earliest - and certainly the most famous - adopters of this technology.  Here in Australia Paul Connor has shown a number of his scaled up ipad drawings and I use it regularly for all of the above purposes. 
Here are some examples:

Landscapes

Left: Burgundy house & landscape

Above: White Cliffs, Dover

Left: Euan at Gerroa                                                                                                    Right: Kelton - the road in.

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Interiors

Above left:  Flight Delay  - London                                                      Above right: Cornflowers & cigarettes (Olley's house)
Above: Flight Delay - Abu Dhabi                                                          Above: 3 Figures (Olley's House)

Above left: Vic's Lounge                                                                         Above right: The Salty Shepherd

Travel sketches

Above left: The Big Tin Can (A 380)                                                      Above right: Hot day to build an airport - Abu Dhabi

Above left: Narita Airport

Above right: Loading the Flying Kangaroo

Left: Aitutaki church & cemetery                                                                                      Right: Holiday kitchen

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Portraits

     

















Left:  The Paisley Shirt                                                                        Right:  Richard - meditating on the rug.

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