# iSeismometer vs RiSet Sky

The clearest difference is price: iSeismometer at Free against RiSet Sky's $1.99. iSeismometer also leads on iOS requirement (16.0 vs 18.0). On ads, in-app purchases and device support there is nothing between them.

iSeismometer is free to download; RiSet Sky costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | iSeismometer | RiSet Sky |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[3.6 (170 ratings)](https://appshunter.io/ios/app/iseismometer/id304190739/reviews)** | — |
| Number of ratings | **170** | — |
| Positive reviews | 76.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | — |
| Monetization | Free | — |
| Size | 3 MB | 9 MB |
| Requires iOS | **16.0** | 18.0 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ObjectGraph LLC](https://appshunter.io/developer/284700705) | [MICHAEL K D SIBBERNSEN](https://appshunter.io/developer/6813751060) |

## What reviewers say

### 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


### RiSet Sky

[App page](https://appshunter.io/ios/app/riset-sky/id6813751058)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is iSeismometer free?

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

### Is RiSet Sky free?

RiSet Sky costs $1.99, with no in-app purchases.

### Do iSeismometer or RiSet Sky have ads?

Neither iSeismometer nor RiSet Sky shows ads.

---

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