Bill a client in two minutes, then get back to the work that earns the money.

Invoices, estimates and sale receipts, issued under your own business name, sent as PDFs, and tracked to the last cent of what you are owed. There is no login to create, because there is no server to log in to.

The CustomInvoice documents list: invoices, an estimate and a sale receipt, all issued under your own business identity, each with its number, its date or due date, its amount and a status pill reading Draft, Sent, Paid or Overdue.

No account

Your client list stays private

iPhone

The two minutes, in three steps

The first one you only do once. After that, billing a client is the second two.

Step 1. Set your business up once

Your name and address, your logo and a brand colour. A new install points you straight there, and everything you send afterwards picks it up. There is no account to make first.

Step 2. Write the invoice

Pick a client, or add one without leaving the document you are writing. Add line items with quantities and rates, apply a tax rate or a discount if the job needs one, and watch the total settle as you type.

Step 3. Send it, then log what lands

Email it from the app or push it through the share sheet, and mark it sent when it actually goes out. Record payments as they arrive, in part or in full, and the balance follows.

The longer version, step by step →

Everything you need to bill a client, and nothing you do not

Built for freelancers, contractors and small businesses. No document limit, no watermark on any page, and no account to create before you are allowed to send the invoice you just wrote.

Invoices, estimates and receipts, all issued by you

Write an invoice for work you have done, send an estimate before you start, or hand a customer a sale receipt on the spot. Add line items with quantities and rates and watch the total update as you type. Every document goes out under your own business name.

Send a PDF your client will take seriously

Every document renders as a clean, printable PDF. Send it by email straight from the app, or push it through the share sheet into whatever your client actually uses. A document is only marked as sent when you say it went out.

See exactly who has not paid you

Record part payments and full payments against any invoice and watch the balance fall. Paid, part paid, outstanding and overdue are worked out from your payment record every time they are shown, so the number in front of you is never a stale total someone forgot to update.

Three templates, your logo, your colour

Choose Classic, Modern or Minimal, then put your own logo and brand colour on every page. Set your own numbering too, with a separate sequence per document type, so ACME-0001 reads the way your books already do.

Tax rates and discounts that add up

Create named tax rates and apply them per line, so a job mixing taxable labour with exempt materials bills correctly. Discount a single line or the whole invoice. Every amount is a whole number of cents, and line totals are rounded individually then summed, so the total always equals the column your client is reading.

Reports, and a CSV for your accountant

See what you are owed, how much of it is late and how late, and what you billed and collected each month. Export your documents and payments to CSV and hand your bookkeeper a spreadsheet instead of a shoebox.

See everything CustomInvoice ships today →

There is no account, so there is nothing to breach

Most invoicing apps make you create an account before you can send anything, then keep your client list on their servers. CustomInvoice never asks, because it never needs to.

No account

No sign-up, no password, no cloud sync. There is nothing to log in to, and so nothing to breach.

No bank connection

CustomInvoice cannot reach your bank, because there is no code in it that could. No linking, no aggregator, no card processing.

Your clients stay yours

Their names, addresses and what they owe you are commercial information about someone else. It is written to your device and never transmitted to us.

Works in airplane mode

Writing, rendering and sending a document needs no network of ours. On a plane, in a basement, or on a site with no signal, it behaves the same.

Your business is not measured

No usage events, no crash reports, nothing sent to an ad network. The one thing we count is anonymous installs - never how many clients you keep, what you charge them, or what you do in the app.

Your records, portable

Back up everything to one file and restore it on any phone, or export your documents and payments to CSV for your accountant. Your books are not held hostage by an app.

“We never receive a monetary amount, a client name, or a line of any document you write. Not because we filter them out - because nothing in the app sends us anything at all.”

Read the full privacy policy →

Why CustomInvoice?

How invoicing from your own phone differs from the two usual alternatives

Feature	CustomInvoice	Subscription apps	Word or Excel
Getting started	Open it and write the invoice	Create an account, verify an email, pick a plan	Find last month’s file and edit over it
Where your client list sits	On your phone, and nowhere else	Your clients and amounts, on their servers	Retyped on every document
What it costs to send one	Nothing, and no watermark on any page	A monthly fee, or a capped free tier	Nothing, if you already own the software
Knowing who has paid	Worked out from your payment record, every time	Usually tracked, if you are on the right plan	A second spreadsheet you maintain by hand
Working without signal	Writes, renders and sends offline	Needs the network to do almost anything	Depends which one, and whether it synced