Alerti - Earthquake & Tsunami

Location-Based Seismic Alerts

Only for iPhone

Free · Designed for iPhone. Not verified for macOS.

iPhone

Alerti delivers earthquake and tsunami notifications based on your location, sourced directly from official seismic and tsunami monitoring agencies across the Asia-Pacific and beyond. DATA SOURCES Earthquake monitoring: • USGS (U.S. Geological Survey) — global coverage • KMA (Korea Meteorological Administration) — South Korea • JMA (Japan Meteorological Agency) — Japan • CWA (Central Weather Administration) — Taiwan • BMKG (Badan Meteorologi, Klimatologi, dan Geofisika) — Indonesia Tsunami monitoring: • PTWC (Pacific Tsunami Warning Center / NOAA) — Pacific Ocean • JMA — Japan coastal regions • KMA — Korean coastal regions Alerti polls these official sources frequently and sends a push notification when a new event is published. Detection and delivery times depend on the originating agency. FEATURES Home Feed • Live list of unconfirmed and confirmed events • 24-hour activity timeline • Pull-to-refresh Interactive Map • View epicenters, intensity, and affected regions • Tap any event for detailed information Event Detail • Magnitude, depth, and distance from your location • Seismic intensity and magnitude type • Tsunami wave height and arrival window (when available) • Station count, source agency, and affected regions • Step-by-step response guidance with visual pictograms • Localized district-zoom map of the impact area Customizable Alerts • Toggle earthquake and tsunami alerts independently • Set a minimum magnitude threshold (1.0 to 6.0) • Choose alert radius from 10 km to 1,000 km • Configure sound and vibration • Schedule quiet hours Safety Reporting • "I'm Safe" button on event detail screens Languages Available in English, 한국어, 日本語, Bahasa Indonesia, Tiếng Việt, Filipino, and ไทย. Other • Dark mode • Severity classification (Critical / Advisory) based on your magnitude threshold; tsunami events are always Critical LOCATION USE Alerti requests your location only while the app is open. It is used to compute distance from epicenters and decide which alerts are relevant. Your location is never shared with third parties. IMPORTANT Alerti is an informational app. It is not a substitute for official emergency warning systems issued by government agencies, such as J-Alert, ShakeAlert, or national Emergency Alert broadcasts. During a disaster, always follow guidance from local authorities. Support: alerti@synctechno.com Website: https://www.synctechno.com

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Alerti 1.1.0 Update View the 10 latest disaster events worldwide and receive INFO notifications regardless of your current location. Notifications now provide clearer essential information, including the affected area, magnitude, and intensity. When regional intensity data is available from the reporting agency, it is visualized on the map with intensity-based colors and a legend. Available tsunami risk information, including expected wave height, is displayed on the map and event details. Improved current-location display and location controls on the map. Evacuation action pictograms are now available in the response plan. Alerts and disaster information follow the app language, while event times are shown in the device’s local time. Improved alert severity classification and notification content. Added the custom disaster notification sound and in-app update guidance. Improved overall security, stability, and usability.

Version 1.1.0

The developer, SyncTechno Inc., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Linked to You

    The following data may be collected and linked to your identity:

    • Location
    • Contact Info
    • User Content
    • Identifiers
    • Usage Data

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
SyncTechno Inc.
Size
41.1 MB
Category
Weather
Compatibility
Requires iOS 15.1 or later.
  • iPhone
    Requires iOS 15.1 or later.
  • iPod touch
    Requires iOS 15.1 or later.
  • Mac
    Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Location
This app may use your location even when it isn’t open, which can decrease device battery life.
Languages
English
Age Rating
4+
Copyright
© 2026 SyncTechno Inc.
  • Developer Website
  • Privacy Policy

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