EWS vs Tsunami Shield
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
EWS
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Cambodia is ranked amongst the 4 most at-risk countries in Asia, according to the 2018 World Risk Report. The 2017 Climate Change Vulnerability Index ranks Cambodia between “High and Extreme Risk,” which implies a probability that climate change impacts will lead to a higher frequency of hydrological disasters both in terms of floods, drought and reduced water availability throughout Cambodia, ActionAid International Cambodian is designing a new project named Advancing Early Warning Systems in Cambodia under funding support from the GSMA -FCDO budget to promote an early warning system in Cambodia. The project aims to reduce the impact of disaster risk in target disaster-prone areas: 1) Ground Water Level Monitoring (GWLM) systems strengthened and expanded to additional disaster-prone areas to expand the coverage and impact of the mobile EWS 1294. 2) Communities have increased access to disaster early warning information through an effective and innovative mobile early warning system, EWS 1294. 3) Stakeholders’ coordination on disaster risk reduction and early warning systems is strengthened among relevant ministries and the national disaster management committee.
Tsunami Shield
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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
Verdict
EWS and Tsunami Shield are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | EWS | Tsunami Shield |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 6 weeks | — |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.1 | 15.1 |
| Further details — not scored | ||
| Size | 30 MB | 44 MB |
| Age rating | 4+ | 4+ |
| Developer | ARROWDOT Co,.Ltd | Smart Send Australia Pty Ltd |
In-app purchases
EWS
No in-app purchases
Tsunami Shield
No in-app purchases









