# Three9 Billing | Offline-First Billing for Clothing Stores

> Three9 Billing is fast, offline-first billing and stock software for clothing stores: barcode or phone-camera scanning, 48 mm receipts with a UPI QR, live stock, customers and sales dashboard.

URL: https://three9.in/billing.html

# Billing that keeps working when the internet doesn't.

Scan, bill and print a receipt with a UPI QR in seconds. Stock, customers and sales update on their own, and every bill is saved on the device first, so power cuts and outages don't lose a sale.

Book a demo See how it works

- Works offline
- Phone camera or USB scanner
- 48 mm receipts with UPI QR

![Three9 Billing counter with a sale in progress](https://three9.in/media/products/bill-counter.webp)

![Printed receipt with UPI QR code](https://three9.in/media/products/bill-receipt.webp)

**3** ways to add items: scanner, camera or typing

**1** tap to print the receipt and save the bill

**48 mm** thermal receipts with a UPI QR for the exact amount

**4** payment modes: Cash, UPI, Card and Other

How a sale works

## From scan to paid in under a minute.

One screen at the counter. Everything else, from stock to reports, updates by itself.

1. **Scan** Scan the tag with a USB scanner or phone camera, or type the item name.
2. **Adjust** Change quantities, add a discount and pick the payment mode. Regulars are recognised by phone.
3. **Print** One tap prints a 48 mm receipt and saves the bill.
4. **Get paid** The customer scans the UPI QR with the exact amount already filled in.
5. **Done** Stock, customer history and today's sales update on their own.

Features

## Everything a shop counter needs.

Screens below show Three9 Billing with sample data.

Billing counter

### Bill a customer in seconds.

One screen for the whole sale. Scan or type items, change quantities, give a discount in % or ₹ and choose Cash, UPI, Card or Other. Charging for an alteration? Type it and set your own price.

- Warns when stock runs short
- Recognises returning customers by phone number
- Big, simple controls for any staff

![Three9 Billing counter with items, customer, discount and total](https://three9.in/media/products/bill-counter.webp)

Receipts

### Receipts customers can pay from.

Clean 48 mm thermal receipts with your shop name, address, phone and logo. Each one carries a UPI QR code for the exact bill amount: the customer scans and pays, with nothing to type.

- Discount and payment mode printed
- Reprint any bill from History
- Automatic invoice numbers

![48 mm thermal receipt with a UPI QR code (sample data)](https://three9.in/media/products/bill-receipt.webp)

Offline-first

### Power cut? Keep billing.

Every bill is saved on the device first, then synced to the cloud when the connection is back. If the power goes in the middle of a bill, the unfinished bill is still there when you reopen the app.

- Sync status always on screen
- Several phones and counters stay in step
- Install it like an app on a phone or PC

**Saved on this device** Instantly, even with no internet

**Synced to the cloud** As soon as the connection is back

**Live on every device** Other counters and phones update by themselves

All changes syncedWaiting to sync…Offline: working from this device

The sync status is always on screen, so staff know exactly where every bill is.

Dashboard

### Know your numbers at closing time.

Sales for today, this week and this month, with items sold and average bill. Today's payment split shows cash in hand against online payments, ready for closing the counter.

- Last 7 days at a glance
- Top customers and best-selling items
- Discounts given and low-stock count

![Sales dashboard with today, week and month totals, payment split and top items](https://three9.in/media/products/bill-dashboard.webp)

Stock & price categories

### Stock that updates itself.

Every sale reduces stock automatically, and items running low are highlighted. Group items into price categories: pick a category and the price fills itself.

- Adjust stock with + and −
- Search by name or barcode
- Set your own low-stock level

![Inventory list with stock levels and low-stock items highlighted](https://three9.in/media/products/bill-inventory.webp)

Barcode labels

### Barcodes for everything you sell.

Clothing often arrives without barcodes. Generate one for each item, queue the labels you need and print an A4 sheet with name, code and price, ready for your label printer or print shop.

- Choose how many copies of each
- Works with any USB barcode scanner
- Or scan with a phone camera

![Sheet of printed barcode labels with item name, code and price](https://three9.in/media/products/bill-labels.webp)

Customers & history

### Know your regulars.

Customers are saved from bills automatically by phone number. See visits, total spent and every invoice for each one, and find any old bill in seconds.

- Search by name or phone
- Full invoice history per customer
- Reprint any bill

![Customer list with visits and total spent](https://three9.in/media/products/bill-customers.webp)

Also included

## The details that make it dependable.

#### USB or camera scanning

Use a USB barcode scanner, or the camera of any phone.

#### Bill history

Search by invoice number, customer name or phone, and reprint.

#### Survives power cuts

The bill in progress is kept even if the power goes.

#### Live cloud sync

Every device signed in to the shop stays up to date.

#### Shop settings

Shop name, address, phone, logo, UPI ID and low-stock level.

#### Private sign-in

Sign-in required, and new accounts need your shop passcode.

#### Any device

Runs in the browser on phones, tablets and PCs, and installs like an app.

#### Backup files

Download a backup of all your data in one click, and restore it any time.

Why Three9 Billing

## Made for a real shop counter.

Built with a working clothing store for the problems small shops actually face: unreliable power and internet, stock without barcodes and busy counters.

**01**

### Never lose a bill

Saved on the device first, synced later. Power cuts and outages don't wipe your sales.

**02**

### No new hardware needed

Any phone works as a barcode scanner. Add a USB scanner and a small thermal printer if you like.

**03**

### Get paid faster

Every receipt has a UPI QR for the exact amount, so customers pay in seconds.

**04**

### Made for clothing stores

Price categories, your own barcode labels and custom items like alterations.

**05**

### Simple for any staff

One screen to bill, clear buttons and nothing to install.

**06**

### Your data, backed up

Live cloud sync, plus backup files you can keep.

FAQ

## Common questions

Anything else? Email [info@three9.in](mailto:info@three9.in) or WhatsApp [+91 63599 33939](https://wa.me/916359933939?text=Hi%20Three9%2C%20I%20have%20a%20question%20about%20Three9%20Billing.).

**What do I need to use it?**

A phone, tablet or computer with a web browser. A USB barcode scanner and a small thermal receipt printer (48 mm print width) are optional: a phone camera can scan barcodes too.

**Does it work without internet?**

Yes. After the first sign-in on a device, every bill is saved on that device and syncs to the cloud when the connection comes back.

**Can more than one counter or phone use it?**

Yes. Every device signed in to your shop sees the same stock, bills and customers, updated live.

**My products don't have barcodes. Is that a problem?**

No. Generate a barcode for each item in the app and print label sheets. You can also bill by typing the item name.

**Does it make GST invoices?**

Not at the moment. Three9 Billing prints simple retail receipts. If you need GST invoices, tell us and we can discuss it.

**Is my data safe?**

Only signed-in staff can open your shop, and new accounts need your shop passcode. Data is kept on your device and in a secure cloud database, and you can download a full backup file at any time.

**Is it only for clothing stores?**

It's built for clothing stores, with price categories and barcode labels, but it works for any small shop that sells tagged items.

Book a demo

## See Three9 Billing in action.

We'll show you Three9 Billing with sample data, from scanning to the receipt, and help you get set up with your own items.

- Email: [info@three9.in](mailto:info@three9.in)
- WhatsApp: [+91 63599 33939](https://wa.me/916359933939?text=Hi%20Three9%2C%20I%20would%20like%20a%20demo%20of%20Three9%20Billing.)
- US phone: [+1 (743) 962-3939](tel:+17439623939)
- India phone: [+91 63599 33939](tel:+916359933939)

> Online form (`billing_demo_form`): fill it in on the web page, or send it with this site's MCP server (see /llms.txt).

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Three9 · US +1 (743) 962-3939 · India +91 63599 33939 · info@three9.in · More for AI agents: https://three9.in/llms.txt