Pick by the job: POS order-and-pay if guests pay by phone, a QR menu to read, tablets for a device per table, an AI waiter to order by chat in their language.
Yes. Orders go to a staff board and kitchen screen, and staff ring the sale into their own till. What that costs you, who it suits and who should skip it.
Barely. The best peer-reviewed study found about 1% more per check and 10% shorter meals. The 20-30% claims trace to a hypothetical and vendor marketing.
From free to about $300 a month, or a share of sales. Three example restaurants, every assumption stated, show when a flat fee wins and when it doesn't.
Twelve steps for serving guests who don't speak your language: menu, photos, allergens, prices, tipping, waiter calls and bills, plus an example order.