In a large bowl, whisk together flour, baking powder, cinnamon, salt, and sugar.
Stir in the milk, egg, and vanilla extract until the batter is smooth.
Fold in the diced apples until evenly distributed.
Preheat your air fryer to 370°F (188°C) for 3-5 minutes.
Spray the air fryer basket with cooking spray.
Drop spoonfuls of batter into the basket, leaving space between each fritter.
Air fry for 8-10 minutes or until golden brown, flipping halfway through.
Let them cool slightly and dust with powdered sugar or drizzle with glaze if desired.