Preheat your oven to 350°F. Grease and flour a 9-inch round cake pan.

In a bowl, whisk together the flour, baking powder, cinnamon, and salt.

In a separate large bowl, beat eggs and sugar until well combined. Add oil and vanilla, and mix well.

Gradually add the dry ingredients into the wet ingredients, mixing until just combined.

Fold in the chopped apples.

Pour the batter into the prepared cake pan and smooth the top.

Bake for about 40 minutes, or until a toothpick inserted into the center comes out clean.

Let the cake cool in the pan for 10 minutes, then transfer to a wire rack to cool completely.