# iSeismometer vs Physics Toolbox Accelerometer

The clearest difference is rating: iSeismometer at 3.6 against Physics Toolbox Accelerometer's 2.0. iSeismometer also leads on review sentiment (76% vs 38%) and ratings volume (170 vs 5). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

iSeismometer holds the better App Store score, 3.6 against 2.0. That said, the two scores are not equally well evidenced: iSeismometer has 170 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 76% of iSeismometer's written reviews are positive against 38% of Physics Toolbox Accelerometer's.

iSeismometer ships an update every 7 months, Physics Toolbox Accelerometer every 8 months. The most recent releases landed on September 17, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | iSeismometer | Physics Toolbox Accelerometer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.6 (170 ratings)](https://appshunter.io/ios/app/iseismometer/id304190739/reviews)** | [2.0 (5 ratings)](https://appshunter.io/ios/app/physics-toolbox-accelerometer/id1008160133/reviews) |
| Number of ratings | **170** | 5 |
| Positive reviews | **76.4% of reviews** | 38.5% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 7 months** | Every 8 months |
| Monetization | Free | Free |
| Size | 3 MB | 15 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ObjectGraph LLC](https://appshunter.io/developer/284700705) | [Chrystian Vieyra](https://appshunter.io/developer/998187453) |

## 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


### Physics Toolbox Accelerometer

[App page](https://appshunter.io/ios/app/physics-toolbox-accelerometer/id1008160133)

This app uses your device's accelerometer to measure and graph G-Force and acceleration over time. It allows you to record and export data as a CSV file, making it useful for analyzing motion in vehicles, vibrations, and educational physics experiments.

**Highlights:** Measures G-Force and acceleration, Graphs G-Force vs. Time, Graphs Acceleration vs. Time, Records and exports data as CSV, Analyzes motion in vehicles and vibrations, Useful for classroom physics experiments

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is iSeismometer free?

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

### Is Physics Toolbox Accelerometer free?

Physics Toolbox Accelerometer is free to download, with no in-app purchases.

### Which has better reviews, iSeismometer or Physics Toolbox Accelerometer?

iSeismometer is rated higher. iSeismometer averages 3.6 out of 5 from 170 ratings, while Physics Toolbox Accelerometer averages 2.0 from 5 ratings.

### Do iSeismometer or Physics Toolbox Accelerometer have ads?

Neither iSeismometer nor Physics Toolbox Accelerometer shows ads.

### Which is updated more often, iSeismometer or Physics Toolbox Accelerometer?

iSeismometer ships an update every 7 months, and Physics Toolbox Accelerometer every 8 months. Most recently, iSeismometer was updated on September 17, 2026 and Physics Toolbox Accelerometer on September 7, 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.*