Native POS app for iOS and Android
The web POS works, but it assumes a connection and a keyboard. The native app is built for a counter: card reader pairing, receipt printing, and a local cache that keeps selling through a dropped Wi-Fi connection, then reconciles the queue when it comes back.
Same catalog, same stock pool, same customer record as the rest of the hub. A shop sale decrements the stock a marketplace listing is quoting from, in the same second.

