Carta is a free iPhone app developed by eShares Inc. that helps individuals and businesses manage equity. The app provides a comprehensive platform to manage equity grants and options, making it easier to build businesses and invest in the companies of tomorrow.

With Carta, users can accept equity grants, exercise options, and access important equity-related documents. The app also includes features such as real-time cap table updates, secure document storage, and the ability to track investment performance.

The user interface is intuitive and easy to navigate, making it a great tool for both novice and experienced equity holders. Overall, Carta is a valuable asset for anyone looking to manage their equity in a streamlined and efficient way.