Dundue tracks the invoices you're waiting on, tells you exactly when to follow up, and writes the email for you — six steps that stay courteous while getting steadily harder to ignore.
Chasing money is awkward, so Dundue makes the timing a decision you already made. Six steps, keyed to the due date. A step that has been sent never repeats, and paying stops the ladder immediately.
Step one, rendered from the app's own template with sample details filled in. Every message goes out from your mail app and your address — Dundue never sends anything on your behalf.
See everything you're waiting on, bucketed by urgency — overdue, due soon, later, paid — so the state of your money is one screen, not a spreadsheet.
A standing queue of what's due to go out today, so a follow-up never depends on you remembering it on the right afternoon.
From courtesy note to final notice, each one professional and ready to send. They fill in the client, the invoice number, the amount and the date.
The ladder tracks what has already gone out, so a client never gets the same reminder twice — and never gets a gentle nudge after a final notice.
Keep clients with their balances and payment history, mark partial payments, and write off what is not coming back.
No account, no servers, no tracking. Your client list and what they owe never leave the device, and you can export a versioned JSON backup you control.
Most freelancers don't have a collections problem. They have a timing problem: the invoice went out, it quietly went past due, and chasing it feels rude enough that another week goes by. The money is not in dispute — nobody sent the second email.
Dundue removes the decision. You log the invoice once, and from then on it tells you which follow-up is due and hands you the words. The escalation is deliberate: the first note assumes the payment is already on its way, and the last one is firm without ever becoming a threat. That is the whole product — the ask gets harder to ignore while the tone stays professional, because these are people you want to work with again.
Everything is local. There is no account to create, no server holding your client list, and every message is sent from your own address through your own mail app — so your client sees an email from you, not a notification from a debt-collection service.
Dundue is free for your first 15 invoices; one purchase unlocks unlimited invoices forever. Clients, the ladder, composing and export stay free either way.
Dundue is designed and built by Simon Shih, who also makes Billowe, Tally, HitchWell, and UGCio.
No — and that is deliberate. Dundue tells you when a reminder is due and writes it, then hands it to your own mail app so you can read it, change it, and send it from your address. Nothing goes out without you.
A courtesy heads-up three days before the due date, a due-today note, then a gentle nudge at three days past, a follow-up at seven, a second follow-up at fourteen, and a final notice at thirty.
No. Sent steps are logged, so the ladder never repeats itself and never goes backwards down the escalation.
Billowe creates and sends the invoice. Dundue handles what happens after — tracking what is unpaid and chasing it politely. They are separate apps and neither requires the other.
On your iPhone. No account, no servers, no tracking. Export a versioned JSON backup whenever you want, and keep device backups on so your history survives a lost phone.
Free for your first 15 invoices. A single one-time purchase unlocks unlimited invoices — there is no subscription.