Simple Invoice App

Everything you need to invoice. Nothing you do not.

InvoiceSonic keeps the everyday invoicing workflow short: choose a client, add the work, check the total and send. You can make the first invoice without signing up, then save clients, track invoices and automate reminders when you need a repeatable system.

First invoice without signup · iPhone, iPad and web · Professional PDF

Simple does not mean limited — Tax, discounts, deposits, recurring invoices and reminders are there when you need them. They stay out of the way when you do not.

Download the InvoiceSonic app for iPhone & iPad

Invoice generator form

Your business
Bill to (client)
Invoice details
Line items
Description Qty Unit price Tax %
Totals
Payment details
Notes
Open interactive editor

What you get

Start without an account

Create and download the first invoice immediately. Decide whether to save it only after you have seen the finished PDF.

Clean invoice builder

Client, line items, tax, discount and payment terms sit in one clear flow instead of across an accounting dashboard.

Automatic totals

Quantity, rate, tax, discounts and deposits calculate as you type, reducing the errors that slow client approval.

Send a professional PDF

Download the invoice or email it to the client with consistent branding and a clear amount due.

Remember repeat clients

Save client and service details so the next invoice takes seconds rather than another round of data entry.

Chase payment automatically

When you upgrade, InvoiceSonic tracks opens and sends scheduled reminders for invoices that go overdue.

How it works

  1. 1

    Add the client and work

    Enter who you are billing and describe each product, service, hour or fixed fee in plain language.

  2. 2

    Check tax, terms and payment details

    Choose the correct tax treatment, set a real due date and add the bank or payment rail you want the client to use.

  3. 3

    Download or send

    Create the PDF immediately, or save the invoice so you can email it, track it and follow up from the same app.

Create your first invoice now

No signup is required to build and download a professional PDF.

Create an invoice free

Frequently asked questions

What is a simple invoice app?

A simple invoice app focuses on creating, sending and tracking invoices without forcing a small business into payroll, inventory or full-ledger accounting. It should save repeat details, calculate totals correctly and make the amount and due date obvious to the client.

Can I create an invoice without signing up?

Yes. InvoiceSonic lets you create and download your first professional invoice without an account. Signing up is useful when you want to save clients and invoices, email from the app, track opens or schedule reminders.

Does the app calculate sales tax or GST?

Yes. Select the relevant country and tax treatment, then the invoice calculates tax from the rate you set. Australian invoices support GST and ABN fields; US invoices use sales-tax wording and USD.

Can I use it on my phone?

Yes. InvoiceSonic has a native iPhone and iPad app and also works in a mobile browser. The web version works on Android and can be added to the home screen.

When would I need accounting software instead?

Choose accounting software when you need a full ledger, payroll, inventory, bank reconciliation or a bookkeeper working inside the system. If your problem is creating invoices and getting them paid, a focused invoice app is usually faster and less expensive.