Tsunami US vs Earth++
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Tsunami US
This app helps users understand their tsunami risk by providing inundation maps for the US West Coast and Hawaii. It offers information on tsunami warnings, preparedness, and links to relevant authorities.
- Tsunami inundation maps
- Risk assessment for US West Coast
- Risk assessment for Hawaii
- Tsunami warning information
- Preparedness guidance
- Links to authorities
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Tsunamis are amongst the deadliest natural disasters. Eighty percent of all tsunamis occur in the Pacific threatening in particular US' West Coast and Hawaii. Is your home located in a potential tsunami inundation zone? Is your workplace, your children's school, your favorite recreation spot or restaurant? Do you want to learn about tsunami warnings and how to prepare for the worst case? Tsunami - US West Coast contains the available tsunami inundation maps for California, Oregon, Washington State, and Hawaii and helps you to know your tsunami risk. It helps you to know whether you are located in a tsunami inundation zone and comes with a lot of information around tsunamis warnings, preparedness, and relevant links to authorities.
Earth++
Monitor global weather, earthquakes, climate changes, and marine conditions. Access real-time data on storms and natural events. An optional subscription removes ads and unlocks advanced tracking for tropical cyclones and ocean forecasts.
- Storm tracking
- Earthquake monitoring
- Climate change data
- Marine conditions
- Tropical cyclone tracking
- Ocean forecasts
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Track the latest storms and other natural events worldwide with Earth++. The latest weather, earthquakes, climate changes, and marine conditions are available. Information is courtesy of a variety of open sources, as indicated in the attribution label. There is an auto-renewing subscription option within the app to remove ads, track tropical cyclones, typhoons, hurricanes and other global weather hazards, and comprehensive ocean conditions forecasts for the Atlantic and Pacific oceans. Development of global storms is funded in part by ads, which can be removed by selecting the monthly auto-renewing subscription option "Premium upgrade" from the app's settings menu. Upgrading to premium also provides access to other premium content and features. The subscription price of 0.99 USD (in your local currency) will be charged to your iTunes account at confirmation of purchase and, for each renewal, within 24 hours prior to the end of the current month. You can cancel the subscription at any time through your iTunes account settings, but you must do so at least 24 hours before the end of the current month to avoid being charged, and ads will show again at the start of the subsequent month. Terms of use: https://www.kellytechnology.com/privacy/tac.html Privacy policy: https://www.kellytechnology.com/privacy/privacy_policy.html
Screenshots
Verdict
The clearest difference is rating: Earth++ at 4.4 against Tsunami US's 2.8. Earth++ also leads on ratings volume (285 vs 17). Tsunami US's advantage is in-app purchases (none vs 5) and ads (none vs shown). On price, review sentiment, update cadence 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. Earth++ sells 5 in-app purchases, starting at $0.99 per month. Tsunami US asks for nothing beyond the download.
Earth++ holds the better App Store score, 4.4 against 2.8. That said, the two scores are not equally well evidenced: Earth++ has 285 ratings behind it against 17, so its average is the more settled of the two. Written reviews split almost evenly too, at 50% and 50% positive.
Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on September 8, 2026 and September 22, 2026 respectively.
| Parameter | Tsunami US | Earth++ |
|---|---|---|
| Price | Free | Free |
| Rating | 2.8 (17 ratings) | 4.4 (285 ratings) — better |
| Positive reviews | 50.0% of reviews | 50.0% of reviews |
| Number of ratings | 17 | 285 — better |
| Update frequency | Every 3 months | Every 3 months |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 41 MB | 85 MB |
| Age rating | 4+ | 17+ |
| Developer | Matthias Hackl | Kelly Technology Inc. |
Customer experience
Tsunami US
Earth++
In-app purchases
Tsunami US
No in-app purchases
Earth++
- Premium Upgrade$0.991 Month
- Tropical Cyclone Coverage$2.99
- Ocean Conditions Forecasts$2.99
- Global CIimate Imagery$2.99
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- Remove Ads$3.99
