Have you got an iPhone? If you just search slimming world in apps it comes up. I agree though that it's not that great - I only use it to check syns when I am on the go, but find it quite limited in the results it gives. It is free though!
I nearly downloaded this but read the reviews and did bother! I downloaded the my fitness pal app which goes on calories for the day rather than syns etc but I still find it great for keeping track of things x