Preheat oven to 350° degrees.
In large mixing bowl cream together butter and sugars until light and fluffy.
Beat in egg and vanilla extract.
Combine together: flour, cinnamon, baking soda, and salt.
Gradually add to creamed mixture, mixing well.
Stir in oats and chopped apples.
Drop onto parchment lined baking sheets with a small cookie scoop, 2" apart.
Bake 10-12 minutes until golden brown in color. Cool on wire rack.
Store in airtight container after completely cooled.