# Epicenter vs Tsunami US

The clearest difference is rating: Epicenter at 4.4 against Tsunami US's 2.8. Epicenter also leads on review sentiment (80% vs 50%) and update cadence (every 4 days vs every 3 months). Tsunami US's advantage is in-app purchases (none vs 2) and iOS requirement (9.0 vs 17.4). On price, ratings volume, ads and device support there is nothing between them.

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

Epicenter holds the better App Store score, 4.4 against 2.8. Both are backed by a comparable volume of ratings — 39 and 17 respectively. Written reviews point the same way: 80% of Epicenter's written reviews are positive against 50% of Tsunami US's.

Epicenter ships an update every 4 days, Tsunami US every 3 months. The most recent releases landed on September 23, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Epicenter | Tsunami US |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (39 ratings)](https://appshunter.io/ios/app/epicenter-earthquake-map/id972755325/reviews)** | [2.8 (17 ratings)](https://appshunter.io/ios/app/tsunami-us/id1102725866/reviews) |
| Number of ratings | **39** | 17 |
| Positive reviews | **80.0% of reviews** | 50.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 3 months |
| Monetization | Paid | **Free** |
| Size | 102 MB | 41 MB |
| Requires iOS | 17.4 | **9.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jess Taylor](https://appshunter.io/developer/417821730) | [Matthias Hackl](https://appshunter.io/developer/1102725865) |

## What reviewers say

### Epicenter

[App page](https://appshunter.io/ios/app/epicenter-earthquake-map/id972755325)

Explore global earthquake activity from the past 30 days on an interactive globe. View detailed information, animate seismic events over time, and customize map displays. Includes companion apps for Apple Watch and a Today Widget for quick access to recent data.

**Highlights:** 30 days of global earthquake data, Interactive rotatable and zoomable globe, Earthquake details (magnitude, depth, source), Date scroller and animation, Customizable map terrain and fault lines, Apple Watch app for recent data, Today Widget for quick access

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Epicenter+ Monthly | $1.99 | per month |
| Epicenter+ Annual | $9.99 | per year |


### Tsunami US

[App page](https://appshunter.io/ios/app/tsunami-us/id1102725866)

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.

**Highlights:** Tsunami inundation maps, Risk assessment for US West Coast, Risk assessment for Hawaii, Tsunami warning information, Preparedness guidance, Links to authorities

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Epicenter free?

Epicenter is free to download, with in-app purchases available.

### Is Tsunami US free?

Tsunami US is free to download, with no in-app purchases.

### Which has better reviews, Epicenter or Tsunami US?

Epicenter is rated higher. Epicenter averages 4.4 out of 5 from 39 ratings, while Tsunami US averages 2.8 from 17 ratings.

### Do Epicenter or Tsunami US have ads?

Neither Epicenter nor Tsunami US shows ads.

### Which is updated more often, Epicenter or Tsunami US?

Epicenter ships an update every 4 days, and Tsunami US every 3 months. Most recently, Epicenter was updated on September 23, 2026 and Tsunami US on September 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*