I believe this is the worst app and UI when compared to doordash or Uber eats. Today is the first time I tried GrubHub. Issues 1. Very cluttered poor UI 2. NO coupon codes can be applied. Even the referral can only be applied to delivery order. This is simply outrageous. Why not highlight this - referral applicable only for delivery orders not pickup. No doubt this app has a poor ux. The only reason to use GrubHub was amex . Now I seriously believe or reconsider to even open this app again.