What is PHapp®?

PHapp — "Know What Matters. Know What To Do." — is a free service that delivers verified alerts from trusted official sources like the CDC, National Weather Service (NOAA), FDA, EPA, USDA, and local agencies. It covers weather, health, environmental, and safety risks in 50+ languages, with guidance on what to do for many alert types. Translations are machine-translated and labeled as such.

PHapp is built by Hub Public Benefit Corp, a Delaware Public Benefit Corporation. There are no ads, no data sales, and no tracking.

What PHapp Covers

PHapp provides comprehensive coverage across 41 active risk and hazard categories, including weather emergencies, disease outbreaks, environmental hazards, food and product recalls, and public safety notifications.

Where PHapp Is Available

PHapp serves 3,432 communities across the United States, including territories and tribal nations, with over 3.35 million alerts issued as of 2025.

Three Ways to Access PHapp

• App: Download free from the App Store (iOS) or Google Play (Android)
• Web: Visit ph.app in any browser
• Text/SMS: Currently available in beta

You don’t need to sign up to read alerts in the app or on the web — just open it and choose your community. In the mobile app you can turn on push notifications without signing in. PHapp doesn’t currently offer email notifications.