Why an offline POS is not a luxury
Connections drop during exactly the hour you cannot afford it. What your point of sale does in those minutes decides whether you lose a shift or a rounding error.
Ask anyone who has run a Friday dinner service about their internet and you will get a story. The router reboots, the fibre cut takes four hours, or the mall's shared line buckles under the crowd.
The failure is never convenient
Outages cluster at peak. More devices, more contention, more load — the same conditions that make you busy make the network fragile. A POS that stops when the connection stops fails precisely when a queue is forming.
What offline should actually mean
It is not enough to keep the screen on. A useful offline mode holds the full catalogue and prices locally, accepts cash and card, prints a compliant receipt, and queues every transaction with its original timestamp.
When the line comes back it should reconcile without a human deciding anything — no duplicate tickets, no lost sales, no manual re-entry at close.
Test it before you need it
Pull the cable during a quiet hour and try to complete a sale, print, then reconnect. Watch what appears in the reports. Do it before signing, not during your first outage.