Before the features, the practical question behind free invoice app: where does the software live, and where does your data live with it? This page answers that first, including the cases where you should pick something other than this.
Installed, cloud, or app — the difference that matters
There are three ways billing software reaches you and they fail in different ways, which is the only comparison worth making.
Installed software runs on one machine and keeps the data there. It works with no internet, it is fast, and it is yours. It also dies with that machine unless you are taking backups, it is awkward to use from anywhere else, and sharing it between two people means a network setup or a second licence.
Cloud software runs on someone else's server and you open it in a browser. Nothing is stranded on a laptop, two people can use it at once, there is nothing to install or update, and a dead machine costs you a machine rather than your records. It needs a working connection to do anything at all, and your data is somewhere you do not control — which makes export the thing to check before you commit.
An app is usually one of those two with a phone-shaped front end. The question to ask about an app is where the data actually is: on the phone, or on a server the phone talks to. If it is on the phone, a lost phone is a lost business.
Billing from a phone
Billing from a phone is genuinely useful in some trades and awkward in others. It suits anyone who bills where the work is — a service visit, a delivery, a site, a market stall. It does not suit a counter with a queue, where a physical keyboard, a scanner and a real printer are faster than any phone.
This works on a phone browser rather than as an app from a store. There is no listing to install; you open the site, sign in, and the screens are built to work at that size. You can add it to your home screen so it opens like an app.
The question worth asking about any billing app, including the ones that are real apps, is where the data lives. If it lives on the phone, a lost or wiped phone is a lost set of records, and app-only products that keep a local database are a genuine risk for a business. Here the records are on the server, so the phone is just a window — losing it costs you a phone.
Printing from a phone is the real limitation. Sharing the PDF on WhatsApp usually works better than trying to print, and for many service businesses that is what the customer wanted anyway.
What the free plan actually includes
- Complete GST tax invoices, every legally required field, tax split per line.
- Nothing to install — a browser on any computer, tablet or phone.
- Customers and items stored once, with GSTIN, state, HSN or SAC and rate.
- One numbering series, issued centrally and consecutive within the financial year.
- Stock that moves as you bill.
- A receivables position — what is unpaid, aged, per customer.
- PDF invoices to print, email or send on WhatsApp.
- Full export to CSV, Excel and JSON, on every plan including this one.
- ₹0 — no card, no expiry, not a trial.
Trying it in five minutes
- Start free now — an email address and a password. No card, no download.
- Enter your business name, address and GSTIN.
- Add two or three of your own items with their HSN codes and rates — ideally at two different rates.
- Raise a real invoice and check the tax computed per line.
- Print it on the printer you actually use, or share the PDF to your own phone.
- Raise a second one and confirm the number advanced by itself.
- Export everything and open the file, so you know you can leave.
The hardware question, answered honestly
Browser-based billing works with ordinary hardware, with one real caveat worth knowing before you buy anything.
Printers work the way they work for any web page: if your computer can print to it, this can print to it, including a thermal roll printer with the right paper size set. A USB barcode scanner behaves as a keyboard, so it types the code into the field — nothing special is needed. A phone or tablet works for billing but is poor for printing.
The caveat is deep hardware integration. A browser cannot talk directly to a weighing scale, a fuel dispenser, a cash drawer on a serial port or a card terminal. If your counter depends on the scale posting a weight into the bill, that needs installed software with a driver, and no web application will do it.
So the test is not "will it work with my printer" — it almost certainly will. It is "does anything at my counter need to speak to the software directly". If something does, that decides it.
Where your data is, and how to stay able to leave
With installed software the data is on your machine, and the risk is losing it — a failed disk, a theft, a reformat. With a hosted system the data is on a server, and the risk is different: not losing it, but not being able to take it with you.
The protection against the second is export, and it is worth being specific about what good export looks like. Everything, not a summary. A format you can actually open — CSV, Excel or JSON rather than a proprietary archive. Available whenever you want it rather than on request. And on every plan, because an export that requires a payment to use is a lock.
The question to ask any vendor is what happens to your records if you stop paying. "They are deleted" and "the account is locked" are both answers that should end the conversation for a business keeping statutory records.
Here, export is on every plan including the free one, and the free plan does not expire — so an account cannot lapse into a state where your own records are unreachable.
HSN and SAC codes, and how many digits you need
Every line on a tax invoice needs an HSN code for goods or a SAC for services. How many digits depends on your aggregate turnover in the preceding financial year — smaller businesses report fewer digits than larger ones, and B2B and B2C invoices are treated differently.
Because the requirement is tied to turnover and has been tightened in stages, the practical answer is to store the fullest code you can against each product once, and let the software report at the level required. A six-digit code can always be truncated; a two-digit one cannot be expanded.
Billixo keeps the code on the product record and carries it onto every line automatically, and its AI HSN lookup will suggest one from a plain description when you genuinely do not know.
Invoice numbering: one unbroken series per year
The invoice number has to be consecutive, unique within the financial year, and no more than sixteen characters of letters, numbers, slashes and hyphens. Gaps invite questions. Duplicates cause them.
This is the single most common reason a spreadsheet-based billing setup fails an audit: two people billing on two machines, both starting from the last number they remember. A system that issues the number centrally cannot make that mistake.
The series restarts on 1 April, and Billixo restarts it for you rather than waiting to be told.
The AI, and what it is actually for
The useful application of AI to billing is not a chatbot. It is the twenty minutes a day spent retyping things that already exist on paper.
- Scan a supplier bill. Photograph it; the lines, the GSTIN, the tax and the totals come back as a draft you check rather than a form you fill.
- Find the HSN code. Describe the product in plain words and get a code to confirm, instead of scrolling a list of eleven thousand.
- Ask about your own numbers. "What is outstanding over sixty days?" answered from your data, not a manual.
- Write the reminder. A polite, specific chase for an overdue invoice, ready to send on WhatsApp.
Nothing is sent anywhere until you ask for it, and the platform runs on whichever model it has been configured with — including one hosted on your own server.
Who this actually suits
It fits a business that raises between a handful and a few hundred invoices a month and would rather not think about GST between the 10th and the 20th: traders, distributors, retail counters, workshops, agencies, consultants, contractors and manufacturers who sell on invoice.
It fits less well if you need deep manufacturing costing, multi-currency consolidation, or payroll — those are different products, and pretending otherwise wastes your evaluation time.
If you are not sure which side of that line you fall on, the free plan answers it in an afternoon at no cost. Start free now.
Free, and what it costs you instead
Free software usually costs you something that is not money: your data held hostage, an export that does not work, ads inside your invoice, or a "free" tier so narrow it is a demo with a login screen.
The line here is drawn differently. Export works on the free plan — CSV, Excel and JSON — because data you cannot get out is not data you own. The invoice is a real compliant invoice, not a sample. The limits are on volume and on the conveniences, not on whether the thing works.
Start free now. If it does not suit you, take your data with you.
Where your data lives
On the server this platform is installed on. Every record carries a company identifier and every query is scoped to the signed-in account at the framework level, so one business cannot read another’s data by any route, including a crafted one.
Sign-in is rate limited, sessions can be restricted to one device per user, and passwords are stored hashed. Exports are available on every plan, free included: if you ever want to leave, your data leaves with you.
Frequently asked questions
Is it open source?
No. It is a hosted commercial product with a free plan. If open source is what you want — control, no vendor dependency, the ability to change it — that is a legitimate requirement and there are real projects for it, with the hosting, backups and security updates then being yours.
Can I print on a thermal receipt printer?
Yes, if your computer prints to it. Set the paper size to your roll width and print as you would any page. What a browser cannot do is drive a cash drawer or a weighing scale directly.
Is the free plan a trial?
No. The Free plan is ₹0 with no card and no expiry, and plenty of small businesses stay on it. Every new account also gets the full paid feature set for its first fortnight so you can see the ceiling, and when that ends nothing is charged and nothing is deleted.
Can more than one person use it?
On the paid plans, yes — team logins with their own credentials. The Free plan is a single login, which suits a one-person operation and is usually the first limit a growing business hits.
Is my data shared with anyone?
No. It sits in this installation, scoped to your company. AI requests only happen when you explicitly ask for one, and nothing is sent anywhere otherwise.
Start free, decide later
You do not have to choose a plan to begin. Start on Free, use it for as long as it suits you, and upgrade only when a limit actually gets in your way — never automatically, and never because a countdown ran out.
Open the software demo → — or create the free account from the same page.
Read the full details → on the home page, including pricing and the AI features.
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