Shake Shack is partnering with Uber Eats to make it possible for fans of the chain to use its app to have orders delivered in markets across the country. Customers using Shake Shack’s app will pay a flat delivery fee of 99 cents, and no charge on orders over $35. The restaurant chain is offering free fries with every delivery through the end of the month. “With an influx of new and returning guests to our digital channels this past year, we’ve accelerated our digital investment,” said Randy Garutti, Shake Shack CEO.