Invoice Simple is a lightweight invoicing app designed for people who want to bill clients quickly without dealing with full accounting software. It’s best known as a mobile app (iOS and Android), but also offers a basic web experience.
The focus is speed and simplicity: create an invoice, send it, and move on.
If you’re a freelancer, contractor, or solo business owner, invoicing can feel like busywork. Invoice Simple removes friction. You don’t need to set up charts of accounts or learn accounting terms. You just enter your client, add line items, and send.
It’s especially useful if you invoice on the go, work in the field, or want something far simpler than tools like QuickBooks or Xero.
You create invoices or estimates using pre-built templates. Add your logo, taxes, discounts, and notes. Invoices can be sent by email or shared as PDFs. You can track when invoices are sent, viewed, and paid.
Watch-outs: advanced accounting features are intentionally missing. There’s no full double-entry accounting, limited reporting, and recurring invoices are basic. It’s an invoicing tool, not a bookkeeping system.
