Your customer places an order and then keeps pulling the screen down to see if anything changed. Your kitchen staff refresh a tablet every few minutes, and an order still gets missed in the rush. The software works, but it is never quite up to date.
That gap is what a WebSocket closes. It is a way for an app or website to keep a live line open to your server, so updates appear on their own the moment they happen. This guide explains what it is in plain words, which features need it, what drives the cost, and the questions to ask your developer.
Quick answer
What is WebSocket, in plain words?
A WebSocket is a connection that stays open between a customer's phone or browser and your server, so both sides can send messages at any time. Mozilla's developer documentation (MDN) says it opens "a two-way interactive communication session between the user's browser and a server". The result is that updates arrive without anyone refreshing the page.
How a normal website talks to the server
A normal web page works by asking. MDN's guide to HTTP (the basic language of the web) says the browser "is always the entity initiating the request". The server answers, and then waits for the next question.
So if a page wants fresh news, it must keep asking. Developers call this polling: checking the server every few seconds whether anything has changed. Most of those checks come back empty.
What changes with a live connection
With a live connection, the phone opens one line to the server and keeps it open. MDN says this lets you "receive responses without having to poll the server for a reply". When the kitchen marks an order "ready", the server pushes that news straight to the customer's screen.
The standard behind this is RFC 6455, published in December 2011 by the IETF (the group that writes internet standards). It was written for apps that need two-way talk with a server without opening many separate connections. MDN lists the browser feature as widely available since July 2015.
When does your business need real time app development?
You need live features when a delay of even a minute causes a wrong action, a missed order or a worried customer. If the information only changes once a day, a normal page is enough and costs less to build and run.
| Feature | Needs a live connection? | Why |
| Live order tracking ("preparing", "out for delivery") | Yes | The customer wants to see the change the moment it happens |
| Kitchen or warehouse display screens | Yes | Staff act on new orders right away |
| Customer chat or support chat | Yes | Messages must appear both ways without refresh |
| Live booking slots that fill up fast | Often | Two people should not book the same slot |
| Sales dashboard checked once a day | Usually not | A refresh button does the job |
| Menu, price list or blog | No | The content rarely changes |
Real example: a kitchen screen in a cafe
Kafe Kufe is The Beyond Horizon's own restaurant software. Guests scan a QR code at the table and order from their phone, and the kitchen sees the order at once. Its case study records sub-200 millisecond kitchen updates in production.
The same live line sends each order status change to kitchen screens, waiter devices and the manager's dashboard together. Orders move through clear stages: received, preparing, ready, served and completed. The kitchen display updates "in real time via WebSocket", with no polling and no reload.
If you are planning an app with live order tracking, chat or a kitchen screen, see how The Beyond Horizon plans and builds mobile apps for Indian businesses.
WebSocket vs other ways to show live updates
A live two-way connection is not the only option. There are three common ways to keep a screen up to date, and the right one depends on who needs to send messages.
| Method | Who can send | Good for |
| Polling (asking every few seconds) | Only the phone or browser asks | Simple pages where a short delay is fine |
| Server-sent events | Only the server sends | One-way updates, like a live score or a status feed |
| Live two-way connection | Both sides, any time | Chat, kitchen screens, order tracking with replies |
MDN says server-sent events are "unidirectional", meaning data goes only from the server to the browser. That makes them a good fit when customers only need to watch, not reply. For chat or anything where staff and customers both send updates, a two-way connection fits better.
What about when the app is closed?
A live connection works while the app or page is open. When the customer closes the app, the line is gone.
To reach them then, apps use push notifications, the short messages that appear on the lock screen. An order-tracking app can use both: live updates inside the app, and a push notification for the big moments.
What drives the chat app development cost?
We do not publish a price for this, because the cost depends on your features. What we can do is show you the parts that make a real-time feature cost more or less, so you can compare quotes on the same terms.
- How many kinds of screens get live updates. A kitchen screen alone is smaller than kitchen, waiter, manager and customer screens together.
- Whether messages must be saved. Chat history needs a database and rules for how long you keep it.
- How many people are connected at once. More open lines mean more server capacity and a bigger monthly hosting bill.
- What happens when the internet drops. A good app reconnects on its own and catches up on missed updates.
- Who can see what. Staff roles, like "only managers can cancel an order", need checks on the server for every message.
Questions to ask your developer
Ask what happens to an order if the kitchen tablet loses Wi-Fi for two minutes. Ask whether your hosting plan supports long-lived connections, and how the monthly bill changes as more people connect. Ask how they will test the feature with many devices at once before launch.
Live updates without building your own server
A live connection is not the only way to get real-time behaviour. Some ready-made services, such as Google's Firestore database, can send changes to every open screen for you.
On HRDYAM, a spiritual services platform we built for ZoAstro Tech, consultation bookings are written to Firestore for real-time slot blocking. In plain words, once a slot is taken, other people see it as taken. Ask your developer whether a managed service like this fits your app before paying for a custom live server.
What can go wrong with live features?
The common problems are dropped connections and too many messages at once. Both can be planned for, but only if someone asks about them before the build starts.
Phones move between Wi-Fi and mobile data, and the open line breaks when they do. The app must notice this, reconnect and fetch anything it missed. If it does not, a customer can stare at "preparing" long after the food has left the kitchen.
MDN also warns that the standard browser feature has no built-in way to slow down incoming messages. If messages arrive faster than the app can handle them, the device can fill its memory or stop responding. Ask your developer how the app behaves on a cheap phone during your busiest hour.
A tip most first-time buyers miss
Ask for live updates only on the screens that need them. A menu or "about us" page with a live connection adds server load and nothing for the customer. Put that budget into making order tracking or chat work well when the network is weak.
A closing note
A live connection is a simple idea: keep one line open so news arrives on its own. Used on the right screens, it means fewer missed orders and fewer "is my food ready?" calls.
If you want to talk through which parts of your app need live updates, call or WhatsApp The Beyond Horizon on +91 75973 92744.