You can easily create ID photo data from photographs taken with a smartphone.
It is also possible to save individual photo data.

This app creates data that matches 4x6 size (101.6mm x 152.4mm) of print size of general photograph.

The size of the ID photo can be specified from the following options.
·H 25×W 25 mm (1x1 inch)
·H 35×W 25 mm (1 inch)
·H 50×W 35 mm (2 inch)
·H 45×W 35 mm
·H 48×W 33 mm
·H 45×W 45 mm
·H 51×W 51 mm (2x2 inch)
By entering numbers you can specify other sizes.

The size of the finished print is 4x6 size (101.6mm x 152.4mm) by default but you can change it.