About Ember Otter
Ember Otter is a small independent site with one tool: an invoice due date calculator.
It is part of an experiment on how search engines discover and rank simple tool pages. The calculator itself is real: it counts calendar days from the invoice date, supports common payment terms and was checked against worked examples, such as Net 30 on an invoice dated 1 March giving 31 March.
The site has no advertising and does not sell anything.