Simple Invoicing

Square payments, Gmail delivery, and net terms — all in one place.

Welcome back

Sign in to manage invoices

or

Terms of Service · Privacy Policy

Simple Invoicing
—
Main
Configuration
Admin
Simple Invoicing

Dashboard

Active and past invoices and collections

Active invoices

Unpaid invoices. Click a row or Details to view.

Past invoices

Paid invoices. Click a row or Details to view.

Archived invoices

Archived invoices are hidden from active and past lists but remain accessible to customers.

New invoice

Create a one-time or recurring invoice

Invoice type
Customer

Fees, taxes & extra fields
Add from products

No products yet. Sync from Square on the Products page, or add items manually.

Recurring invoices

These schedules create and email invoices automatically.

Contacts

Customer directory with invoice defaults for autofill

Directory

Add contact


Invoice autofill defaults

Add from products

No products yet. Sync from Square on the Products page.

Products

Sync your Square catalog and reuse common items on invoices

Catalog

No products yet. Connect Square and click Sync from Square, or add a manual item.

Add product

Square-synced products update on sync. Manual products are only stored in this app.

Square

Connect your Square account to accept payments on invoices

Sandbox testing: Square requires an active sandbox seller session before OAuth will load.
  1. Open the Square Developer Console → Sandbox test accounts
  2. Choose Open in Square Dashboard for your test seller account (leave that tab open)
  3. Return here and click Connect with Square
If you skip step 2, Square shows a blank authorization page — that is a Square sandbox limitation, not this app.

Sign in with your Square seller account to authorize this app. Tokens are stored securely per workspace.

ACH bank payments: Enable ACH in your Square Dashboard. Customers can pay invoices by bank on the pay page. If Square was connected before ACH support was added, disconnect and reconnect to grant bank account permissions.

Square credentials and payment setup are managed by your workspace admin.

Gmail

Connect your Gmail account to send invoices

Create a Gmail app password in your Google Account (requires 2-Step Verification). Paste it here — this app never sees your main Gmail password.

Or authorize with Google directly:

Allow Gmail access via Google

Business

Your company details and invoice defaults

Invoice design

Branding, fees, taxes, custom fields, and customer-facing appearance

Branding

Logo
Current logo

PNG, JPG, WebP, GIF, or SVG · max 2 MB

Fees, taxes & custom fields

These appear on every new invoice. Toggle and edit values per invoice when creating it.

Email & pay page

Preview

Users

Manage who can access the admin

Add user

All users

User

Your account details