I built Duesteer because chasing overdue invoices shouldn’t damage client relationships

Chasing an overdue invoice is not difficult because freelancers or contractors are lazy.

It is difficult because every follow-up creates doubt:

Am I messaging too soon?
Am I sounding too aggressive?
What should I do if the client disputes the invoice?
How should I respond when a promised payment date is missed?

Most invoicing tools help create and send invoices, but once an invoice becomes overdue, the user is often left to handle the recovery process alone.

That is why I built Duesteer, an iOS app that guides freelancers, contractors, consultants, and small businesses through a structured invoice-recovery process.

Duesteer provides a guided escalation ladder, from a friendly reminder to firmer follow-ups and a formal demand. It also handles situations such as client disputes, promised payment dates, missed commitments, and pauses in communication.

The goal is not to send aggressive automated messages. The goal is to help users take the right action at the right time while preserving the client relationship.

Duesteer is now live on the App Store. This is still an early version, and I am actively learning which parts of invoice recovery cause users the most stress.

I would especially value feedback from freelancers and small-business owners who regularly deal with overdue invoices:

What is the hardest part of following up with a client who has not paid?