How to make an invoice on iPhone
You finished the job, the client wants an invoice, and you're standing in a car park with nothing but a phone. Here are the three ways to do it, and which one you'll actually keep using.
What has to be on the invoice
Before choosing a tool, it helps to know what you're actually building. Whatever method you use, a serviceable invoice carries the same core information — and if any of it is missing, the client's accounts department has a reason to put your invoice in the "query" pile instead of the "pay" pile.
- The word "Invoice" — sounds trivial, but it distinguishes the document from a quote or a statement.
- A unique invoice number, in a sequence you can defend at audit time.
- Invoice date and due date (or payment terms that imply one).
- Your details — trading name, address, contact, and tax/VAT registration number if you have one.
- The client's details — the legal entity being billed, not just a contact's first name.
- Line items — description, quantity, unit price, and the tax rate for each.
- Totals — net subtotal, tax broken down per rate, anything already prepaid, and the final amount due.
- How to pay you — bank details, a payment link, or a QR code.
Option 1: Apple Numbers
Numbers is free, already on most iPhones, and ships with an invoice template under its Business category. Open Numbers, tap +, pick the invoice template, overwrite the placeholder text, then use the share menu to export as PDF.
Where it works: one-off invoices, or when you already keep your books in a spreadsheet and want the numbers to live in one place.
Where it hurts: editing a spreadsheet on a 6-inch screen is genuinely unpleasant. Tax formulas break the moment you insert a row in the wrong place. There is no invoice numbering, no client list, no record of what you've sent, and no way to know which invoices are still unpaid. Every invoice is a fresh copy-paste of the last one, which is exactly how people end up sending two invoices with the same number.
Option 2: Apple Pages
Pages also includes invoice-style templates and is a bit friendlier to touch editing than a spreadsheet. You get better control over how the finished page looks, and exporting to PDF is one tap in the share menu.
Where it works: if the way the invoice looks matters more to you than the arithmetic, and you invoice rarely.
Where it hurts: nothing is calculated. You are doing the VAT maths in your head or in the Calculator app and typing the result into a text box — which is the single most common source of invoice errors. Same problems as Numbers otherwise: no numbering, no client list, no status tracking.
Option 3: A dedicated invoice app
The third option is an app built for this one job. The advantage isn't really the first invoice — it's the second, and the fiftieth. Your company details are entered once. Clients are saved and reselected. Invoice numbers increment on their own. Totals and tax are calculated, not typed. And you can see, months later, which invoices went out and which ones were never paid.
The usual catch is that most invoicing apps are the front end of a subscription business: they want an account, an email address, a monthly fee, and a copy of your client list on their servers. That's a lot of overhead for a document you need to send twice a month.
Quick Invoice Generator PDF is the version of this without the overhead. No account, no login, no ads, and it works with no internet connection at all because the PDF is rendered on the phone itself. It's free to download; the free plan covers 10 invoices created and 3 shared per month.
Step by step: making an invoice in the app
In Quick Invoice Generator PDF
- Add your company once. On first launch, enter your business name, address, contact details and tax number, and pick a logo. Every future invoice reuses it.
- Tap + on the Invoices tab. A new invoice opens with the next number in your sequence already filled in.
- Choose the customer. Type their details the first time and save them. From then on they're one tap in the customer list, and their address drops straight into the Bill To block.
- Add your line items. Description, quantity, unit price and VAT rate per line. The subtotal, the per-rate VAT breakdown and the total due update as you type.
- Set the dates. Invoice date and due date, plus payment terms and any note you want on the page — bank details, a thank-you, a reference the client asked you to quote.
- Preview the PDF. Tap through to the preview and read it as your client will. This is the step people skip and regret.
- Share it. Mail, Messages, Files, AirDrop — anything in the iOS share sheet. Then set the invoice's status to Sent.
Later, when the money lands, open the invoice and switch it to Paid. That's what makes the Reports tab useful at the end of the month.
Four mistakes that delay payment
- Billing the wrong entity. "Bill To" should be the company that signed the contract, spelled the way it appears on the contract. A friendly first name is not an accounts-payable record.
- No purchase order reference. If the client gave you a PO number and it isn't on the invoice, many finance systems will simply reject it. There's a dedicated field for it — use it.
- Vague line items. "Consulting — €2,000" invites a question. "Implementation support (consulting hours) × 6 @ €120" does not.
- Reusing an invoice number. Duplicated numbers are a genuine accounting problem and an audit flag. Let the app handle the sequence — see the guide to invoice numbering.
The duplicate trick
If you bill the same client for similar work every month, don't start from scratch. Open last month's invoice, tap Duplicate, change the dates and the hours, and send. It turns a ten-minute chore into a thirty-second one.
Make your next invoice in about a minute
Add your company once and every invoice afterwards takes seconds. No account, no ads, works offline.
Free plan: 10 invoices, 3 shares a month · No account · No ads
Frequently asked questions
Can I make an invoice on an iPhone for free?
Yes. Apple Numbers and Pages are free and both include invoice templates. Dedicated invoice apps are usually free to download with a limit — in this app's case, 10 invoices created and 3 shared per month before you need Pro.
Do I need internet to make an invoice on my iPhone?
Not with an app that renders the PDF on the device. Quick Invoice Generator PDF works entirely offline — you can build and export an invoice in airplane mode. You only need a connection at the moment you actually email it.
What file format should I send an invoice in?
PDF, almost always. It looks the same on every device, cannot be accidentally edited, and every accounts department can open it. Never send an editable spreadsheet or Word file as the final invoice. In France and Germany, business-to-business invoices are additionally moving to structured e-invoice formats — see the Factur-X guide.