Since this is the Pro Version, you get many additional features: a low light setting, a picture gallery, a glossary of terms, a breakdown of the hierarchy of vessels (Rule 18), cheatsheets for sound signals (Rules 24 & 25), direct navigation to specific questions, and quiz settings.
This app is continuously improving thanks to user feedback. However, as I am a mariner myself, there will be significant periods with no updates while I'm underway, but I'll still get your feedback.
You are allowed to use this product only within the laws of your country/region. SharewareOnSale and its staff are not responsible for any illegal activity. We did not develop this product; if you have an issue with this product, contact the developer. This product is offered "as is" without express or implied or any other type of warranty. The description of this product on this page is not a recommendation, endorsement, or review; it is a marketing description, written by the developer. The quality and performance of this product is without guarantee. Download or use at your own risk. If you don't feel comfortable with this product, then don't download it.