How to build a restaurant food-ordering app

Before writing a single screen, get clear on which ordering modes you support. A dine-in QR flow, a takeaway pickup flow, and a delivery flow all share a menu and a cart but differ in what happens after payment. Most independent restaurants start with dine-in QR ordering because it removes the wait for a server to take orders and works with your existing kitchen. You can add takeaway and delivery later without rebuilding the core.

The core pieces every restaurant ordering app needs

Strip the app down to its essentials and you are left with a handful of moving parts. Each one maps to a database table and a few screens.

• Menu and categories: dishes grouped into sections (starters, mains, breads, drinks) with price, description, veg or non-veg mark, and an availability toggle so you can hide sold-out items instantly.
• Cart and order: what the diner selected, quantities, special instructions ('less spicy', 'no onion'), and a running total with taxes.
• Table or order context: which table the QR code belongs to, or a pickup name and time for takeaway.
• Payments: a way to collect money via UPI, cards, or cash-on-pickup, with the order marked paid only when the gateway confirms.
• Kitchen view: a simple screen or printout so the kitchen sees new orders in real time and marks them prepared.
• Order history: past orders for the diner and a day's sales for you.

How the ordering flow works, step by step

Walking the flow from the diner's side keeps the build honest. A guest sits down and scans the QR sticker on the table. The link opens your menu with the table number already attached, so no login is needed to browse. They tap dishes, adjust quantity, and add notes; the cart total updates live. When they hit 'Place order', they either pay immediately by UPI or choose 'pay at counter'. The order lands in your kitchen view with the table number and timestamp. Kitchen staff cook it, mark it prepared, and a server carries it out. The whole loop happens without anyone standing at the table with a notepad.

Getting payments and GST right for India

For an Indian restaurant, UPI is non-negotiable. Most diners will pay by scanning a UPI intent or tapping a Razorpay checkout, and settlement is near-instant. Wire the app so an order is only marked paid after the gateway sends a success confirmation, never on the client's word alone, otherwise a dropped connection can leave you serving food that was never paid for. On tax, restaurant GST is usually 5 percent without input credit for most standard outlets, so show the tax line clearly on the cart and the receipt. Keep a per-order record of the tax collected; it saves hours at filing time.

Do you need native apps or a web app?

For dine-in QR ordering, a web app is usually the right answer: the diner scans a code and the menu opens in their browser with nothing to install. Asking a walk-in guest to download an app before they can order is friction that loses orders. Native iOS and Android apps make sense once you have regulars who order takeaway or delivery repeatedly and want a saved cart, reorder button, and push notifications for offers. A sensible path is to launch the QR web experience first, then add native apps for loyal customers once you have demand.

Where Kashvi fits

Kashvi is an AI app builder: you describe the app in plain English and it builds a real, working version, with a real Postgres database for your menu and orders, real sign-up and login for staff, a live preview you can test on your phone, and full source code you can download and own. It builds web apps and real Android and iOS apps through React Native, so the same project can serve QR dine-in and native takeaway. UPI and Razorpay pricing in rupees are first-class, so you are not bolting on payments as an afterthought. If a generation attempt fails, Kashvi refunds the credits rather than charging you for a broken result. It is a genuine head start on the build, not a replacement for thinking through your menu, kitchen workflow, and pricing, which only you can define.

A reasonable first prompt is narrow on purpose: get the QR menu and cart working, test it on a real table, then layer on payments, the kitchen view, and native apps. Shipping the smallest useful loop first beats waiting months for a feature-complete build that never meets a real diner.