No advantage to using this app
This app requires you to tip the driver and pay a delivery charge - two things that are avoided with for example ubereats (although ubereats began charging delivery it is about 1/5th the price of DoorDash). Also the delivery time is the same as if you ordered from the restaurant so there is no advantage to using this app.
vla22 about
DoorDash - Food Delivery, v1.7.5