# Epicentral vs iSeismometer

The clearest difference is price: iSeismometer at Free against Epicentral's $0.99. iSeismometer also leads on iOS requirement (16.0 vs 26.0). Epicentral's advantage is update cadence (monthly vs every 7 months). On review sentiment, ads, in-app purchases and monetization model there is nothing between them.

iSeismometer is free to download; Epicentral costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Epicentral ships an update monthly, iSeismometer every 7 months. The most recent releases landed on July 18, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Epicentral | iSeismometer |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[3.6 (170 ratings)](https://appshunter.io/ios/app/iseismometer/id304190739/reviews)** |
| Number of ratings | — | **170** |
| Positive reviews | 75.3% of reviews | **76.4% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 7 months |
| Monetization | Free | Free |
| Size | 16 MB | 3 MB |
| Requires iOS | 26.0 | **16.0** |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Charles Ammon](https://appshunter.io/developer/297487706) | [ObjectGraph LLC](https://appshunter.io/developer/284700705) |

## What reviewers say

### Epicentral

[App page](https://appshunter.io/ios/app/epicentral/id297487703)

Explore global earthquake patterns with real-time data and historical context. View recent seismic events on interactive maps and lists, with detailed summaries and links to official information. Understand current activity within the framework of historical seismicity.

**Highlights:** Real-time earthquake lists, Interactive earthquake maps, Daily, weekly, and monthly data views, Event summaries and details, Links to USGS earthquake information, Historical earthquake catalogs

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

**In-app purchases:** none


### iSeismometer

[App page](https://appshunter.io/ios/app/iseismometer/id304190739)

Transform your iPhone into a sensitive seismometer to detect and visualize vibrations. Explore its educational and data-collecting capabilities for fun or serious applications.

**Highlights:** Converts iPhone to seismometer, Detects and visualizes vibrations, Data collecting capabilities, Educational use, Adjustable frequency settings, Re-track previous data, X-Y-Z illustrated graphs

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Sensitive and accurate
- 👍 Simple and easy to use
- 💡 Useful for various applications (e.g. monitoring vibrations, detecting heartbeat)

**What reviewers complain about**

- 🐛 Crashes or freezes on newer devices
- 🔋 High battery consumption
- 🔒 Lacks security/privacy features (e.g. no option to disable data transmission)

**Reported bugs**

- Buttons/controls not working on newer iOS versions
- Keyboard not appearing in text input fields
- Inconsistent performance across device models

**Requested features**

- Add sensitivity control
- Implement zero control for reference plane
- Increase recording time
- Improve UI/UX (e.g. color coding, scrolling, chart speed control)
- Implement Richter scale or other measurement units


## Frequently asked questions

### Is Epicentral free?

Epicentral costs $0.99, with no in-app purchases.

### Is iSeismometer free?

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

### Do Epicentral or iSeismometer have ads?

Neither Epicentral nor iSeismometer shows ads.

### Which is updated more often, Epicentral or iSeismometer?

Epicentral ships an update monthly, and iSeismometer every 7 months. Most recently, Epicentral was updated on July 18, 2026 and iSeismometer on September 17, 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.*