gengoufreeSome of the best apps on the iPhone are the simple ones – and Gengou Free [iTunes] is a perfect example of this.

It only does one thing – converts the non-Japanese calendar year into the Japanese calendar year.

Whilst it’s not the kind of app that you’ll use everyday, there are times when it’s indispensable, such as filling in forms at your local ward office or trying to remember your date of birth when being stopped by police for owning a bicycle.

It is very iPhonesque, oozing sex appeal thanks to the rolling dials that you flick your finger across to change the year you’d like to convert.

There is also a paid version of Gengou [iTunes], although I’d suggest that the free version without bells and whistles does the job just fine.