An apple corer is a device for removing the core and pips from an apple. It may also be used for a pear, quince, or similar fruits.
Some apple corers consist of a handle with a circular cutting device at the end. When pushed through the apple, it removes the core, to the diameter of the circular cutting device. The core can then be removed from the apple corer.
An apple corer is often used when many apples need to be cored, from making an apple pie to brewing cider.