Original
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Gets a clear bill in English or Tamil, a WhatsApp copy they can find later, and a statement of what is still due if they buy on credit.
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Tax invoiceGST billing on the phone your staff already carry
Billing App Development Company in Coimbatore
A billing app shaped around your counter, your item list and your customers on credit. Bills print on a Bluetooth printer or go out on WhatsApp, and the owner sees the day's sales before closing. Built from our Tiruppur office.
- GSTIN
- HSN / SAC
- UPI QR
- Tally export
- Tamil bill
One bill, start to finish
What happens at the counter in under a minute
Most Coimbatore counters already have a rhythm: pick the customer, add items, collect, print. A good billing app keeps that rhythm and removes the retyping, the wrong rates and the missing copies.
01
Pick or add the buyer
Search by phone number or name. Walk-in customers skip this; business buyers carry their GSTIN and place of supply onto the bill automatically.
Customer02
Add items fast
Scan a barcode with the phone camera, tap a favourite, or type the first letters. Rate, unit, HSN code and tax come from the item master, not from memory.
Items03
Discounts and returns
Line or bill discounts within the limit you allow, free items, and returns that create a proper credit note instead of a scribbled minus.
Adjust04
Cash, UPI, card or credit
Show a UPI QR on screen, split a payment across modes, or post the balance to the customer's credit ledger with a due date.
Collect05
Print or send
Print on a 58 mm or 80 mm Bluetooth thermal printer, or share a PDF bill on WhatsApp. Both copies stay on the record.
ShareThree copies, three readers
Who the bill is really for
Duplicate
Counter and van staff
Bill in a few taps, see stock before promising an item, and collect payments on the route without carrying a receipt book.
Triplicate
Owner and accountant
Day-end sales by counter, mode and staff, tax summaries for filing, overdue credit and stock running low, on the phone in the evening.
Modules
What goes into a billing app we build
A first release normally ships the counter, item master and day-end report. The rest follow once the counter trusts it.
GST invoices and bills of supply
Tax invoices with GSTIN, HSN or SAC, CGST and SGST or IGST by place of supply, plus bills of supply and composition-scheme formats where they apply.
Item master and barcodes
Items, units, variants, batch and expiry where needed, with camera barcode scanning and label printing.
Stock in and stock out
Purchases, sales, returns and transfers update stock as they happen, with low-stock alerts.
Credit ledger and reminders
Customer-wise balances, part payments, due dates and polite WhatsApp reminders you approve.
Van and field billing
Route-wise customers, offline billing on the road and collection entries that sync when the signal returns.
Multiple counters and branches
Separate bill series per counter or branch, with one owner view across all of them.
Day-end and tax reports
Sales by mode, staff and item, tax summaries and exports your accountant can use for returns.
Connections
Where the billing app plugs in
- Tally and accounting
- Sales and receipts exported in a format your accountant imports, or synced where your accounting software supports it.
- GST e-invoice and e-way bill
- For businesses that must issue e-invoices, bills can be registered through an authorised GST suvidha provider to receive the IRN and signed QR.
- UPI and payment gateways
- Dynamic UPI QR on screen and payment links, with the payment matched back to the bill.
- Bluetooth printers and scanners
- Common 58 mm and 80 mm thermal printers and barcode scanners, tested on the phones your staff use.
- PDF bills, statements and reminders through click-to-chat or the official WhatsApp Business Platform.
- Your website or online store
- Online orders land as bills in the same series, so stock and tax stay in one place.
Related portfolio work
Recent builds with the same moving parts
We have not published a dedicated billing app case study yet. These recent products already handle what a billing app depends on: a running stock balance, an organised item catalogue and one login that switches between locations.
Stock in, used and balance
Hyprotek
Every material shows received, used, returned and balance, and the reports roll up for the owner. A billing app's stock view and day-end report are built on the same pattern.
See it in our portfolio
Catalogue by category
VW marketplace
Listings are organised by category with photos and details. An item master for a hardware shop, a mobile store or a distributor needs the same quick, visual category picker at the counter.
See it in our portfolio
One login, many locations
Kaarya Site
Engineers switch between assigned sites from one login, each with its own records. Branch and counter switching in a billing app, with a separate bill series for each, works the same way.
See it in our portfolioWho we build billing apps for
Coimbatore businesses that bill all day
Hardware, electrical and paint shops
Thousands of small items, trade and retail rates, contractor credit and quick barcode billing at a crowded counter.
Mobile and electronics stores
Serial or IMEI capture on the bill, warranty dates, accessories and service job sheets that turn into a bill on delivery.
Distributors with van sales
Route billing, scheme items, collection on the road and returns from retailers, synced to the office stock at night.
Pump, motor and spares dealers
Model and serial numbers, dealer and end-user rates, and service visits billed against the original sale.
Bakeries, sweet stalls and cafes
Fast counter billing with favourites, kitchen or packing slips and a clean day-end by payment mode.
Workshops and service firms
Job cards with parts and labour lines that become a tax invoice when the work is done.
How we build it
From your current bill book to a live billing app
We start from the bill format your customers already recognise and the reports your accountant already asks for.
- INV-01
Collect your bill formats
Photos of your current bills, item list, credit notebook and the reports your auditor or accountant needs. We note which fields are mandatory for your GST registration type.
- INV-02
Agree the first release in writing
Counters, users, bill types, payment modes, printers and reports for version one, plus what waits. Scope, schedule and terms are signed off before building starts.
- INV-03
Clickable counter on real phones
Your counter staff tap through a full bill on the Android phone or tablet they will use, with your printer connected, in English or Tamil.
- INV-04
Build, import and run in parallel
Short build cycles with test versions. We import your items and customer balances, then run the app beside the old system for a few days before switching.
- INV-05
Go live and support
Training at the counter, store listing or private distribution under your company name, and support as you add counters, branches and integrations.
Planning guide
Billing app or packaged billing software?
When packaged billing software is enough
There are many capable GST billing packages, and a single-counter shop with a standard process should usually start with one. If you bill from one desktop, your items are simple and your accountant is happy with the exports, a subscription or one-time licence is the sensible first step.
Businesses in Coimbatore come to us when the counter is no longer one desk. The salesman bills from a van on the Avinashi Road route, the service engineer needs to bill at the customer's site, two branches share one stock, or the owner wants the day's sales on the phone instead of calling the shop. Those needs are about where billing happens, and a phone-first app handles them better than a desktop screen squeezed onto a mobile.
What a custom billing app changes
A custom billing app is built around your bill format, your item master and your people. The counter screen shows only the buttons your staff use. The van screen works offline. The owner gets a short day-end view built around the questions they already ask. Because the app is yours, it can carry your brand on Google Play and the App Store, or be installed privately on staff phones.
It also fits what you already run. Sales can flow to your accounting software, online orders can arrive as bills in the same series, and job cards can turn into invoices. When the workflow is unusual, our custom mobile app development page explains how we scope it, and rice mills and mandis can see our dedicated rice mill billing software.
GST details we get right from day one
The fields on a tax invoice are not optional decoration. Supplier and buyer GSTIN, HSN or SAC codes, place of supply, the correct split between CGST and SGST or IGST, invoice numbering without gaps per series, and credit notes for returns all need to be correct from the first bill. We check these against your registration type with your accountant before the counter goes live.
Larger businesses also have e-invoicing and e-way bill duties under GST rules. Where those apply to you, the app sends bill data through an authorised GST suvidha provider and stores the IRN and signed QR on the bill. We do not give tax advice; your accountant confirms which rules apply, and we build to that.
Start with one counter, then add more
The billing apps that last start with one counter and the day-end report, then add credit reminders, van billing and branches once the staff are comfortable. Our MVP app development approach applies here, and one React Native codebase keeps Android and iPhone users on the same features. If you also follow up leads before the sale, see our CRM app development page.
Itboomi is a dedicated mobile app development company with its office in Tiruppur, serving Coimbatore. For the wider picture start from our Coimbatore homepage or the Android and iOS services page, see our ecommerce app development page if you sell online too, then talk to our team.
FAQ
Billing app development questions
Do you build GST billing apps for Coimbatore businesses?
Yes. Itboomi is a dedicated mobile app development company with its office in Tiruppur, serving Coimbatore. We build billing apps for Android and iPhone with a web admin panel, shaped around your own bill format, items and counters.
Can the app print on a Bluetooth thermal printer?
Yes. We support common 58 mm and 80 mm Bluetooth thermal printers and test the exact printer and phone models your counter uses before go-live. Bills can also be shared as PDFs on WhatsApp.
Does billing work without internet?
Yes. Bills, collections and stock entries save on the phone and sync when the network returns, with a clear marker on anything not yet uploaded. Invoice numbering is planned so offline bills never clash.
Can it generate e-invoices and e-way bills?
Where your business must issue them, the app can send bill data through an authorised GST suvidha provider and store the IRN and signed QR on the bill. Your accountant confirms which GST rules apply to you.
Will it work with Tally?
Sales, receipts and credit notes can be exported in a format your accountant imports into Tally, or synced where a supported connector exists. We agree what moves between the systems in writing during discovery.
Is a custom billing app better than buying billing software?
Not always. Packaged software suits a single counter with a standard process. A custom app makes sense when billing happens in vans, at customer sites or across branches, or when you want the app under your own brand.
Who owns the billing data and source code?
You do. The database runs in an account under your company, and the source code, store listings and documentation are handed over to you.
Have you built a billing app before?
Our rice mill and mandi billing software already covers GST invoices, challans and party ledgers for one trade, and recent builds such as Hyprotek, VW and Kaarya Site cover stock balances, item catalogues and multi-location logins. We have not published a general retail billing case study yet.
Close every day with one clean bill book
Tell us where you bill today, at the counter, in the van or at the customer's site. You get a written first-release plan to approve before any build starts.
Contact us
We Ignite your Business
with our Love
Itboomi is a mobile app development company in Coimbatore, working from our office in Tiruppur.
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itboomi innovations, 8/1162, Sakthi Complex,First Floor, Pooluvapatti Pirivu, P.N Road, Tiruppur,Tamil Nadu 641602
