Order food off.

[tufguy]

Do we order food off an app or resturant? Like "I ordered food off xy food app" or "I ordered food off McDonald's". Are these correct?

 

[tedmc]

I order food from a restaurant (using/via an app).

 

[emsr2d2]

I wouldn't use "off".

I order food through an app.
I order food on an app.
I order food through/on/from the Deliveroo app.

If I were naming the restaurant, I would use "from".

I order food from The Shanghai Kitchen in town.

 

[Skrej]

'Off an app/website' works in AmE. It doesn't work with 'restaurant', however. We order 'from' a restaurant.