Jargonnay is a Mac app that provides easy-to-understand explanations for jargon words encountered at work. It uses AI to personalize the explanations and works on any Mac application. Users can highlight an unknown term and ask Jargonnay for an explanation without having to go to another app. The tool also includes a web dashboard where users can create their own dictionary and add other users to their team. Jargonnay offers a lifetime free plan and two subscription plans with different limits on the number of terms per month and the number of users that can be added to a team.