Want to look younger in photos? There's one thing to do…

Question mark over face which is younger.

Approaching my 45th birthday and feeling prematurely middle-aged, I decided to check that I didn't actually look 45. For me, this didn't involve pointing a video camera in the faces of baffled passersby and demanding that they put a number to my wrinkliness, as producers do in certain reality TV shows. No: I turned to two far-less-embarrassing AI programs instead (and, trust me, some of your clients will be doing this too!)

Age detect prefers (or gives a lower age) to the pic with the smile – 36 – as opposed to the one without – 39. Both taken with the same phone, seconds apart. (Image credit: Ariane Sherine)