I cropped and tuned the picture in Snapseed and saved it. I converted it to black and white still in Snapseed and then added a blur in iColorama. I then took this into Superimpose as the background. I brought in the coloured version and masked out the background leaving the mother, child and bike in colour and the rest grey. Finally I took this into Stackables and applied one of my own formulas.
Apps: Camera+, Snapseed, iColorama, Superimpose, Stackables.