In a big mixing bowl, combine the zest and juice of the orange. Add the maple syrup and ground cinnamon, whisking until well blended.

Add the red seedless grapes, blackberries, and chopped pecans to the bowl.

Cut the sweet apple into bite-sized cubes and add it to the mix. Gently toss everything to coat the fruit with the dressing.

Serve immediately or cover and refrigerate until ready to serve.