Can several people at one table order from their own phones?

Yes, in systems built for it. Petpooja lets guests at a table order separately onto the same table bill, and Toast lets one guest start a group order for others to join.

• Petpooja Scan & Order: guests order separately and add rounds at any time; every order joins the same table bill.
• Toast group ordering: one guest starts a group order and others join. One member can pay so everyone's items fire to the kitchen.
• Toast server-started orders: a server opens the table, then guests scan and add items.
• Ask any provider how it handles splitting the bill and a guest who leaves early.
• Test it with a friend at a real table before you switch it on.