Hey Product Hunt 👋 I'm Han, building Duebell solo. It started with a question I asked 30+ freelancers: how do you actually deal with a client who pays late? The pattern in their answers surprised me — it's almost never the client refusing. It's the awkward follow-up that never gets sent. One person rewrote the same reminder four times and never sent it. So Duebell sends the sequence for you, in your name: a pre-due heads-up, a day-after nudge, a firmer note, and a final status reset. Every email waits for your approval, and everything stops the instant your client replies. It never touches your money, and it doesn't need QuickBooks. The research thread that shaped it is public on Indie Hackers, and I'm building the rest in public too. 20 founding spots are open at $9/mo locked forever — full refund anytime before launch and 14 days after. Doors open early September. If you've ever chased an invoice, I'd love to hear what your worst one looked like 👇

Duebell

Polite invoice reminders that stop when your client replies

Polite invoice reminders that stop when your client replies