Freelancers on r/freelance keep asking for a dead-simple overdue-invoice chaser

The problem

Recurring thread pattern on r/freelance and r/smallbusiness over the past month: solo freelancers and 2-5 person agencies complaining that chasing late-paying clients eats hours every week and feels awkward. Multiple commenters describe the same manual routine — calendar reminders, copy-pasted 'gentle nudge' emails, escalating tone by hand. One highly upvoted comment: 'I just want something that watches my unpaid invoices and sends politely escalating reminders automatically, and stops the momen