Questions about CustomInvoice

Anyone self employed who bills a client: freelance designers, developers and writers, photographers, electricians, plumbers, painters, landscapers, cleaners, tutors, coaches, consultants, market traders and makers. If you send an invoice under your own business name, it is for you.

Yours. Every invoice, estimate and receipt CustomInvoice creates is issued by your own business, to your own clients, for your own work and sales. The app does not provide letterheads or templates belonging to any other company, by design.

No. There is no sign-up, no password and no cloud sync. Open the app and write the invoice. Most invoicing apps make you create an account before you can send anything; this one does not, because there is no server for an account to live on.

Invoices for work you have done, estimates or quotes before you start, and sale receipts you hand a customer on the spot. Each type keeps its own numbering sequence, so your books read the way you keep them.

Every document renders as a PDF. Send it by email straight from the app, or push it through the share sheet into whatever your client actually uses. It goes through your own mail app, not through us. A document is only marked as sent when you say it went out.

Record part payments and full payments against an invoice and the balance falls. Paid, part paid, outstanding and overdue are computed from your payment record every single time they are displayed rather than stored, so the figure in front of you is never a stale total that someone forgot to update.

Three: Classic, Modern and Minimal. Each one takes your logo and your brand colour, and none of them puts a watermark on the page. There is no narrow-format template for thermal receipt printers.

You create named tax rates and apply them per line, so a job that mixes taxable labour with exempt materials bills correctly. CustomInvoice records the rates you enter and reports what you collected. It does not decide which rates apply to you, does not do jurisdiction lookup and does not file anything.

Every amount is a whole number of cents and every quantity a whole number of thousandths, so there is no floating-point drift. Line totals are rounded individually and then summed, which means the total on the invoice always equals the column your client is reading down. Document numbers are never reused, so your sequence stays an audit trail.

Not from another app or a spreadsheet: there is no spreadsheet import and no migration from another app. The one file CustomInvoice reads back is its own backup - save it from Settings on one phone and restore it on another.

Yes, if you want it to. Turn on overdue reminders in Settings and pick a time of day, and the app reminds you on an unpaid invoice's due date and again at 7, 14 and 30 days late. Reminders are scheduled on your phone, nothing about them is sent anywhere, and they stop once the invoice is paid. They are off until you turn them on.

Yes. Writing a document, rendering the PDF and recording a payment all happen on the device, so the app works with the radio off, on a plane, in a basement, or on a site with no signal. Sending needs whatever your mail app or share target needs.

iPhone on iOS 15 or later, and Android. There is no iPad version: the app installs on an iPad in compatibility mode, as an iPhone-shaped window, but it was not laid out for a tablet.