Know NOW is a free iPhone app developed by CentrAlert Inc. It falls under the category of Education & Reference, specifically Books. This app aims to keep users informed about emergencies in real-time and provides a platform for creating and following groups for localized information.

With Know NOW, users can create and follow groups to receive emergency alerts and access essential media related to those groups. The app automatically delivers verified emergency alerts as push notifications, including text, locations, photos, videos, audio, documents, and web links, providing maximum context to each message.

In addition to following groups, Know NOW allows users to create and lead their own groups. Public groups are searchable by the public, while private groups require an invitation from the group leader. Group leaders can send alerts to their followers, including an alert subject, message, and media. The app also features a media tab where group leaders can post permanent items for their followers.

It is important to note that the accuracy of the information provided by Know NOW is sourced from various entities and may be subject to change without notice. The app also includes a map tab, which relies on third-party sources and may contain positional inaccuracies or errors.

Know NOW provides a convenient way for users to stay informed about emergencies and create their own social or anti-social network for sharing important information. However, users should exercise caution and verify information from official sources before taking any action based on the alerts received through the app.