Sending an invoice is easy — getting paid is the hard part. FieldNudge is simple invoicing + automatic, polite payment reminders for small service businesses (cleaners, MSPs, landscapers, freelancers). • Invoice in four fields • Reminders before due, on due, then 3/7/14/30 days overdue • Stops when client taps Mark as paid • Never touches customer money — no processing fees Free for 30 days or 30 invoices (no card). Then $9/mo intro, then $19/mo.