Comparison

Tsunami vs Tsunami Shield

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Tsunami

Receive instant, life-saving alerts for tsunami warnings, advisories, and watches worldwide. This app provides clear, actionable information from official sources to help coastal residents and travelers stay informed and act quickly during emergencies.

Highlights
  • Real-time push notifications for tsunami alerts
  • Concise alert details on an easy-to-understand dashboard
  • Interactive map to visualize threats
  • Reliable official data aggregation
  • Privacy-first design with no ads
Features
Read full description

Tsunami Watch - Your Coastal Guardian Stay safe with instant notifications (paid subscription required) for tsunami warnings, advisories, and watches. Tsunami Watch delivers reliable, life-saving alerts for coastal areas worldwide, helping you and your family act quickly when every second counts. Whether you live along the Pacific Coast, in Hawaii, Alaska, the Caribbean, or travel to tsunami-prone regions like Japan, the Philippines, Indonesia, or Australia, Tsunami Watch keeps you informed with clear, actionable information from official sources. KEY FEATURES • Real-time push notifications (paid subscription required) for tsunami warnings, advisories, and watches tailored to your chosen coastlines • Easy-to-understand dashboard with concise alert details – perfect even in high-stress situations • Interactive map to visualize threats and monitor coastal risks • Reliable official data aggregated from trusted government and meteorological agencies • Privacy-first design – minimal data collection, no ads Born from a real near-miss experience during a major earthquake in the Philippines, Tsunami Watch was created to provide fast alerts for distant quakes that might not be felt but can still generate dangerous tsunamis. Perfect for: • Coastal residents in the US, Canada, Central and South America, and Pacific-bordering countries • Travelers and families wanting proactive disaster preparedness • Anyone seeking a simple, trustworthy tool for natural hazard awareness Download Tsunami Watch today and never miss a critical alert. Stay alert. Stay safe. Note: This app provides supplemental information and does not replace official emergency instructions from local authorities. Always follow guidance from emergency management officials. Privacy Policy: https://tsunami.watch/privacy/ Terms of Use (EULA): https://tsunami.watch/terms/

About

Tsunami Shield

Read full description

Tsunami Shield – Your Tsunami Safety Companion Tsunami Shield helps you prepare for, respond to and stay informed during tsunami emergencies. Whether you're at home, travelling or monitoring loved ones overseas, Tsunami Shield gives you the information and tools you need when every second matters. Free to download with a 3-day free trial. After your trial, a monthly or annual subscription is required to continue accessing all features. All features are available in full during the trial and to active subscribers. OFFICIAL TSUNAMI ALERTS Receive official tsunami warnings and alerts for your monitored locations and current position when supported by local authorities. GLOBAL TSUNAMI MONITORING Track earthquakes and tsunami activity around the world with an interactive globe and real-time monitoring tools. PROTECT MULTIPLE LOCATIONS Monitor your home, family members, holiday destinations and other important locations around the globe. EVACUATION GUIDANCE Access practical evacuation information and guidance during tsunami warnings, helping you understand what actions to take. Includes map and step by step guidance to safety. EMERGENCY ASSISTANCE Quickly access emergency phone numbers and essential assistance information for your current country or other supported locations. TRAVEL MODE Stay safe while travelling the globe and add countries you visit to be informed of any local alerts. DESTINATION SAFETY CHECKS Research historical tsunami activity and coastal risk before travelling to potential tsunami-prone destinations. QUICK SAFETY MESSAGING Send pre-filled "I'm Safe" or "I need Help" emergency messages to loved ones using your device's messaging apps (with your GPS co-ordinates included for ‘I need help’ messages). DESIGNED FOR PREPAREDNESS Tsunami Shield is built to help individuals, families and travellers stay informed and better prepared before, during and after tsunami emergencies. Key Features • Official tsunami alerts and warnings • Real-time global earthquake monitoring • Multi-location protection worldwide • Evacuation guidance and safety information • Emergency assistance tools • Travel Mode • Global Watch • Destination tsunami risk checks • Quick safety messaging for loved ones • Designed for travellers, families and coastal communities Important: Tsunami Shield provides informational and preparedness tools only and should not replace official emergency instructions, evacuation orders or local authority guidance. Tsunami Shield Terms & Conditions: https://tsunamishield.tech/terms Tsunami Shield Privacy Policy: https://tsunamishield.tech/privacy

Screenshots

Tsunami4 screens
Tsunami Shield4 screens

Verdict

The call

The clearest difference is in-app purchases: Tsunami Shield at none against Tsunami's 2. On price, ads, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Tsunami sells 2 in-app purchases, starting at $1.99 per month. Tsunami Shield asks for nothing beyond the download.

Scorecard1 real difference · 8 level
Tsunami versus Tsunami Shield: the parameters behind the verdict, then further details
ParameterTsunamiTsunami Shield
PriceFreeFree
Rating1.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 5 weeks—
AdsNoNo
In-app purchasesYesNo — better
MonetizationSubscription—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.115.1
Further details — not scored
Size54 MB44 MB
Age rating4+4+
DeveloperDaniel Dale BoydstonSmart Send Australia Pty Ltd

In-app purchases

2 purchases

Tsunami

Subscriptions2
  • 1 Month Push Notifications$1.991 Month
  • 1 Year Push Notifications$19.991 Year
None

Tsunami Shield

No in-app purchases

Questions

Is Tsunami free?
Tsunami is free to download, with in-app purchases available.
Is Tsunami Shield free?
Tsunami Shield is free to download, with no in-app purchases.
Do Tsunami or Tsunami Shield have ads?
Neither Tsunami nor Tsunami Shield shows ads.

Other comparisons