Build an order and charge it to whichever terminal is connected.
Walk-up self-order touchscreen — no login needed.
Kiosk orders — mark them preparing and done.
Check both devices are online and assign a terminal to the kiosk.
Manage the menu — name, price, category and icon.
Balances, loyalty points, and linking physical NFC cards.
Open this on the Android phone with NFC. Installable as an app.