That's great that the diet is working! Congratulations on that half a stone. I'd be happy to lose, say, a few small pebbles at this point. I know it's a great feeling to see the scales go down - or at least, I seem to remember. :-) What a messed up delivery company!
I think it's brilliant. I think most Americans should use this app to really see how much they're taking in. In the US the problem is soda/sugary drinks and bizarre things like froofy coffees (like double lattes, etc.) which bring along copious amounts of calories.