It can be hard to keep up with the ins and outs of kashrut. Bounty bars recently returned to the approved list after many years off it - but how would you know?

Help is at hand with a new mobile phone app from Arta Creative Solutions, which can give the run-down on 8,000 products from the London Beth Din's kashrut guide.

A handy device when your child is pestering you to buy something in the sweetshop.