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For freelancers

Invoice app for freelancers

Bill hours, projects and monthly retainers from your phone. Reminders follow up on late invoices so you do not have to.

Coming soon to the App Store

PRO marks a Sumocat Pro feature. Everything else is free.

Lena Park Design
Invoice #19
Amount due
$1,620.00
Billed to
Harbor Cafe
hello@harborcafe.com
Issued Nov 3, 2026
Due Dec 3, 2026
ItemAmount
Menu redesign1 job × $1,200.00$1,200.00
Revisions3 hr × $90.00$270.00
Print ready files1 item × $150.00$150.00
Subtotal$1,620.00
Total$1,620.00

How to make an invoice as a freelancer

  1. 01

    Add up the job on the calculator

    Type each amount, or work it out with × (hours times rate, area times price), and tap the lines key to add it.

  2. 02

    Turn it into an invoice

    Pick Invoice and tap the action key. Name each line, set units and taxes, and pick the client.

  3. 03

    Send it

    Share the PDF or a link by text or email, then mark it sent. With Pro, email it from the app in one tap.

Built for how freelancers work

Retainers that bill themselves PRO

Set up a monthly retainer once. Each invoice is created on schedule and can email itself.

Late payers followed up PRO

Payment reminders go out on the due date, then 3, 7 and 14 days later.

Ask your books in Claude or ChatGPT PRO

Connect Sumocat to your AI assistant and ask who owes you, or have it draft the next invoice.

Questions

Something else? Write to support@sumocat.app.

Can I bill by the hour?

Yes. Use hr as the unit, enter your hours as the quantity and your rate as the price.

Can I invoice clients in other currencies?

Each document carries its own currency, so you can bill one client in USD and another in EUR. Sumocat does not convert between them.

Does it work with ChatGPT or Claude?

With Sumocat Pro you can connect Claude or ChatGPT to your account. They can report on your invoices, create clients and documents, and send them.

Add it up. Send the invoice.

Sumocat is free on iPhone, with no account needed to start.

Coming soon to the App Store
  • No caps on invoices or clients
  • Works offline
  • Free cloud sync