Iowa crab apples are small, sour apples native to Iowa that are often used for making cider, jellies, and jams. While "Iowa crab apple" is the most common term for this fruit, there are a few other names that it's known by. Some people refer to it simply as a "crab apple," while others use the term "wild apple" to describe it. It's also sometimes called a "sour apple" or "tart apple," reflecting the fruit's intense flavor. No matter what you call it, the Iowa crab apple is a versatile fruit that can be used in a wide range of culinary applications.