Preheat oven to 300° F. Line a 9 x 13-inch baking pan with foil; butter foil. Spread popcorn in pan and drizzle with melted butter; toss popcorn.
Sprinkle popcorn with sugar and cinnamon and toss again. Heat in oven 7 minutes. Sprinkle apple chips over popcorn and heat an additional 3 minutes. Serve warm or cool to room temperature. Store in an airtight container.