Katy is a very fertile early red dessert apple. It does not need a pollinator, it is a very heavy cropper, suitable for the North of the UK. It is easy to grow. It was introduced from Sweden (its name there is Katya) in 1947, a cross between James Grieve and Worcester Pearmain. Katy blossoms over a relatively long period and so it is useful as a pollinator for other varieties.
Fresh off the tree, Katy is moderately crisp and very juicy, with a mild and pleasant flavour. The fruit does not keep well, it tends to soften, and so it is best kept in the fridge.