Install as an app

SecureOps is a web application built to be installed. Once it is on the home screen it opens full-screen, with its own icon, and remembers where you were.

On the shop PC

In Chrome or Edge, open the system and look for the install icon at the right of the address bar (a monitor with an arrow). Click it and confirm. The app appears in the Start menu or the Dock and can be pinned to the taskbar. Set it to open at sign-in so the till is up when the shop opens.

On an Android phone or tablet

Open the PC's address in Chrome, for example http://192.168.8.10. From the menu (⋮), choose Add to Home screen, then Install. The icon appears with the others.

On an iPhone or iPad

Open the PC's address in Safari. Tap the Share button, then Add to Home Screen, then Add.

Finding the PC's address

On the PC, in a terminal:

ip addr show | grep "inet "        # Linux
ipconfig                           # Windows, look for IPv4 Address

Give the PC a fixed address on the router (a DHCP reservation) so the address on the phones does not change after a restart.

What works without the PC

Nothing that matters. The app's shell opens from the phone's own storage, so it starts even when the PC is off, but every screen reads and writes the PC's database. If the PC is off or the phone has left the shop's Wi-Fi, the screens report that the system cannot be reached. There is no offline till by design: a sale that exists only on one phone is a sale the record does not have.

The address, and the outside world

The PC is on the shop's own network. It is not reachable from the internet unless someone deliberately makes it so, and nothing in the install does. The owner reads the day's figures in a text message and an e-mail, not by logging in from home.