Mobile applications for ordering water and food

Good afternoon, Habr!

In continuation of the topic of mobile application development, we want to touch on the other side of this process. Namely, mobile applications for companies, as a way to attract users and increase sales.

The network slipped a mention that a certain company (Russian) released a mobile application for ordering water.
I specially found it in the AppStore:
itunes.apple.com/en/app/id435692776
You can also find a Russian application for ordering pizza and sushi there: itunes.apple.com/en/app/id400983642

Such applications are in demand and provide abroad users a convenient tool for making orders and purchases. In Japan, they generally order fish via Twitter.

In Russia, I'm afraid so far the audience is small and probably not quite prepared. You can argue about this with me. But “for growth,” given the spread of technology, this area can be very much in demand. Again, one could still do it under Android.

I also found on this topic a presentation by Anatoly Larin "Mobile applications in catering . "

I want to ask the community: where is this world heading for? Have you ordered food, water, or something else through apps? Does it make sense and prospects for such applications?