See when it's viewed
When your client opens the invoice, its status changes to Viewed, so you know it arrived.
Send invoices
Send invoices online. Know when they're opened and paid.
Make an invoice on the web, in the app or with /du3 new in Slack or Discord. Your client gets an email with a clean invoice page and a PDF, no account needed, and your team sees it the moment it's viewed or paid.
Works with Slack and Discord. More apps soon.
From blank to sent in one form.
Pick a client
Choose a saved client or add a new one. New clients are saved with their email, company, address, tax ID and usual currency.
Add what you're billing for
One line per item with a quantity and price, plus a tax rate, a due date and notes like payment instructions.
Send it
Your client gets an email with a link to the invoice and a PDF. Du3 numbers it for you, like INV-2026-10-K7Q2.
Built for teams that bill every week.
Reminders until it's paid
On the due date, and every few days after, Du3 reminds your team until the invoice is paid.
Any of our currencies
Each invoice has its own currency. Today you can use Nigerian naira (NGN), US dollar (USD), British pound (GBP), Euro (EUR), Ghanaian cedi (GHS), Kenyan shilling (KES), South African rand (ZAR), Canadian dollar (CAD).
Approvals for your team
Owners and admins send straight away. Invoices made by other team members wait for an admin to approve them.
A full history
Every invoice keeps a record of who created, changed or marked it paid, and whether that happened on the web, in the app or in your workspace.
Mistakes can be undone
Admins can edit any invoice. Deleted invoices can be restored for 30 days.
Questions
Do my clients need an account to see the invoice?
No. They get an email with a link to your invoice and a PDF. Nothing to sign up for.
Can clients pay through Du3?
Not yet. Your client pays you the way they normally would, for example by bank transfer. When the money lands, an admin marks the invoice paid.
How are invoices numbered?
Du3 numbers every invoice for you: INV, the year and month, then a short random code, like INV-2026-10-K7Q2.
Can I add tax?
Yes. Add a tax rate to the invoice and Du3 works out the totals.
How much does it cost?
Du3 is priced per company, not per person, with unlimited invoices on every plan. See the pricing section for today's prices.
Can I send invoices from my phone?
Yes. The Du3 app for iOS and Android can make, send and track invoices, and so can Du3y in Slack or Discord.
Bring your invoices into your workspace.
Setup takes about five minutes.
Works with Slack and Discord. More apps soon.