Contrary to some concerns, the app only collects one sort of user data: cellphone numbers that users voluntarily share and can opt out of sharing, for use in sending texts to users – such as late-breaking changes and emergency updates. The app has no way to collect e-mails, names or other personal information from users.
It's a better situation than we originally thought, as the Inaugural news and video portions of the application could be useful. We're still not ready to recommend this one, but we did want to advise everyone of the Presidential Inaugural Committee's response to privacy concerns and criticism.
Source: Washington Post