I built a simple tool that sends polite invoice reminders so freelancers don’t have to chase clients

I used to hate one part of freelancing more than anything else — sending “just checking in on the invoice” messages.

Doing the work was fine.
Following up on unpaid invoices always felt awkward, so I would delay it. That only made cash flow worse.

So I built PayReminder.

You add an invoice once.
It automatically sends calm, escalating reminders on day 3, 7, and 14 — with your payment details clearly included.

No more chasing.
No more uncomfortable follow-ups.

I kept it very minimal on purpose.

Would love feedback from other indie hackers, especially freelancers who deal with late payments.