DEWN vs Tsunami Shield
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DEWN
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DEWN allows you to access disaster alerts from the Sri Lanka Disaster Management Centre (DMC). This is a collaboration between Dialog, University of Moratuwa, Microimage Mobile Media & DMC of Sri Lanka. This is a free service all citizens & anyone visiting Sri Lanka to have with them to be notified of any threats due to natural causes. Direct Alerts This APP is developed with the intention of alerting you at a time of an emergency. This version will also make use of location based services & alert you based on your last recorded location to the nearest GSM cell in the near future Things to expect from DEWN (Features are only availability to Dialog network in Sri Lanka for now) - Alerts: receive alerts directly released by DMC of Sri Lanka based on your location and threat level (i.e. if an alert is national everyone will receive the message as opposed to a regional alert) - Location: This APP will facilitate location based alerts very soon. We have built in the location map for you to know where the alert level is most relevant even if you are not in that area once DMC of Sri Lanka announces it. - Notifications: All notifications will appear as any other SMS or APP in the notification panel & will remain in-app as well.
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
The clearest difference is iOS requirement: DEWN at 9.0 against Tsunami Shield's 15.1. On price, ads, in-app purchases and device support 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | DEWN | Tsunami Shield |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 11 months | — |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 9.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 17 MB | 44 MB |
| Age rating | 4+ | 4+ |
| Developer | Futura Tech Labs Pte, Ltd | Smart Send Australia Pty Ltd |
In-app purchases
DEWN
No in-app purchases
Tsunami Shield
No in-app purchases









