These delivery apps make the food ordering/delivery experience worse and more expensive for every participant. Delivery people risk their lives (and those of others) to deliver food for utterly substandard compensation. Restaurants fork over a commission of up to 30% to the app. Customers deal with higher prices because restaurants need to make up the cut the app steals, and pay a delivery charge on top of that.
I live in New York City and the experience may not be the same elsewhere, but before the apps, nearly every restaurant/bodega would deliver. There was almost never a delivery fee, and the delivery people never felt like their ability to eat the next day would depend on how quickly the order got to it's recipient, so they weren't operating their vehicles in an (utterly) insane manner.
Everyone pays more and no one gets any more value than before the apps existed.