While Uber is a rather inexpensive alternative to the taxi cab, UberEats is a very EXPENSIVE version of food delivery.
Don't be tricked.
I feel like it actually took me a couple times ordering before I realized how jacked up it is. There's a delivery fee on top of a service fee. And sometimes the restaurant ticks the prices up a little too, because Uber's share of the money cuts into their margin. And it's still expected that you'll tip on top of it.
The feature where you can track exactly where the car is and know when they'll pull up is really tantalizing! But you pay a lot for it, lol.
(I'd imagine Postmates and all the others are the same.)
Sometimes they trick you too, with a "no delivery charge", either as a promotion or the restaurant just naturally carries no delivery charge. And then you realize you're still paying the "service charge".
They probably set it up that way just to be able to offer deceptive promotions, which in general is a marketing strategy that I can't stand.
It's easy to associate Uber with being disruptive and bringing the cost down. But the innovation on food delivery is really just in terms of having access to delivery from more places. It's not a cost effective thing like Uber taxi is. It's more of a luxury thing.