[morsch]

That was my first thought as well, but I figured there must be something more to it and there is: this appears to be an application for the employees of the company use.

An android app that the workers use to collect orders from the customers. After confirming the payment, the App sends the data to the remote server.

So customers aren't meant to install this app. Though, honestly, looking at the video, it still seems like a website could do the same job. Maybe they need it to work offline (and are not aware of/don't want to bother with the web tech that tries to deal with that).

[maherdeeb]

The problem is that the workers are not sitting in front of the computer. They are moving around inside the warehouse with the customers. For them using a phone or tablet can be the best for them. Therefore, I chose to build an App that is simple but productive.

[def8cefe]

I've worked briefly with order picker software. It wasn't a POS but used in the same environment (roaming around a warehouse). It was a terminal application accessed in an android app with some proprietary equivalent of mosh (just this mosh-like android client was licensed at ~$10/device month).

Using an app instead of a site makes it easier for the user and you probably don't even want a browser on the device.