Nielsen Digital App is a tool designed by The Nielsen Company for the iPhone platform. This app allows users to participate in Nielsen's Mobile Panel research, contributing to the understanding of internet and mobile device usage. By installing the app and registering through their website, users can help measure the digital landscape and earn rewards.

By collecting data on app usage, website visits, and content viewing time, Nielsen gains insights into mobile device trends. The app ensures user privacy by anonymizing and aggregating data before sharing reports, and it does not collect user IDs or passwords. For more information, users can refer to Nielsen's Privacy Policy available on their website.