Hacker News Tracker is an iPhone app designed to help users determine if their email address has been involved in recent data breaches. With this app, users can easily check the latest breached domain list and view the types of data that have been exposed. The app sources its data from data dump sites where information is typically leaked after major breaches, providing a convenient way for users to verify if their email address has been compromised.

For advanced features, Hacker News Tracker offers "Tracker Pro" plans with a monthly subscription at $4.99 or a weekly subscription at $1.99. Users can manage their subscriptions and turn off auto-renewal in their iTunes Account settings. The app strictly follows terms of use and privacy policy available at the provided links.