EF Scale vs Disaster Watch
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
EF Scale
Assess tornado and wind damage with this tool that simplifies the Enhanced Fujita (EF) Scale. Follow on-screen prompts to select damage indicators and degrees of damage, then adjust for construction variability to estimate wind speeds.
- Simplified EF Scale assessment
- Damage indicator selection
- Degree of damage input
- Construction variability adjustment
- Visual damage examples
- About and share functions
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Rate tornado damage the way surveyors do. EF Scale puts the complete Enhanced Fujita scale on your iPhone, iPad, and Mac — all 28 damage indicators, every degree of damage, and the expected wind speeds behind each rating. Browse structure types from small barns and family residences to high-rise buildings, transmission lines, and trees. Compare what you see against reference photos and construction details, then pick a degree of damage and tune the wind speed estimate between its bounds to account for construction quality. • All 28 damage indicators of the Enhanced Fujita scale • Reference photos and construction details for every indicator • Degrees of damage with expected wind speeds and EF ratings • Interactive wind speed estimator with adjustable bounds • EF0–EF5 rating reference, always a tap away • Everything stored on device — works fully offline in the field Built for storm spotters, damage surveyors, emergency managers, students, and weather enthusiasts. *** PLEASE REMEMBER: This app is for reference purposes only. Doing a real damage survey takes knowledge and experience you can't build into an app! Official damage assessments are the business of the National Weather Service and their delegates! ***
Disaster Watch
Receive timely alerts for weather, earthquakes, and tsunamis directly from Maldivian authorities. This application is designed to keep you informed and safe.
- Weather alerts
- Earthquake alerts
- Tsunami alerts
- Official alerts from Maldivian authorities
- Safety information
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Stay safe by keeping updated on weather, earthquake and tusnami alerts issued by Maldivian authorities. Application made for National Disaster Management Center of the Maldives
Screenshots
Verdict
The clearest difference is rating: Disaster Watch at 5.0 against EF Scale's 4.5. Disaster Watch also leads on update cadence (every 2 days vs every 20 months) and iOS requirement (8.0 vs 26.0). EF Scale's advantage is ratings volume (4 vs 1). On price, ads, in-app purchases and monetization model 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.
Disaster Watch holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 4 and 1 respectively.
EF Scale ships an update every 20 months, Disaster Watch every 2 days. The most recent releases landed on September 15, 2026 and September 21, 2026 respectively.
| Parameter | EF Scale | Disaster Watch |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (4 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 66.7% of reviews | — |
| Number of ratings | 4 — better | 1 |
| Update frequency | Every 20 months | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, Mac — better | iPhone, iPod |
| Requires iOS | 26.0 | 8.0 — better |
| Further details — not scored | ||
| Size | 18 MB | 32 MB |
| Age rating | 4+ | 4+ |
| Developer | WeatherWary LLC | Mohamed Maail |
Customer experience
EF Scale
Disaster Watch
In-app purchases
EF Scale
No in-app purchases
Disaster Watch
No in-app purchases
Questions
Is EF Scale free?
Is Disaster Watch free?
Which has better reviews, EF Scale or Disaster Watch?
Do EF Scale or Disaster Watch have ads?
Which is updated more often, EF Scale or Disaster Watch?
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