Yes, agree with Nicky, there are definitely better wet foods than Iams and Science Plan, and dare I say, even Royal Canin!

Better foods have a higher meat content and no cereals/grains/veggies (cats don't need 'em). Hi Life realmeat is pretty good, also Natures Menu, Forthglade, Bozita, Applaws (applaws adult isnt complete although I believe the kitten one is).
What you want to see when you look at the ingredient list is meat as the first and main ingredient. If the list starts with cereals or rice and meat is third, fourth or further down the list, I'd give it a wide berth.
Zooplus has a good range of better quality foods for cats
Pet Supplies, Pet Food, and Pet Products on Sale Now at zooplus.co.uk and they have interenational sites
Tierbedarf, Futter, Tiernahrung günstig kaufen bei zooplus.de