# Isotope Browser vs Physics Toolbox Accelerometer

The clearest difference is review sentiment: Isotope Browser at 83% against Physics Toolbox Accelerometer's 38%. Isotope Browser also leads on rating (4.8 vs 2.0) and update cadence (every 6 weeks vs every 8 months). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Isotope Browser holds the better App Store score, 4.8 against 2.0. That said, the two scores are not equally well evidenced: Isotope Browser has 27 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 83% of Isotope Browser's written reviews are positive against 38% of Physics Toolbox Accelerometer's.

Isotope Browser ships an update every 6 weeks, Physics Toolbox Accelerometer every 8 months. The most recent releases landed on September 21, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | Isotope Browser | Physics Toolbox Accelerometer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (27 ratings)](https://appshunter.io/ios/app/isotope-browser/id943890538/reviews)** | [2.0 (5 ratings)](https://appshunter.io/ios/app/physics-toolbox-accelerometer/id1008160133/reviews) |
| Number of ratings | **27** | 5 |
| Positive reviews | **82.6% of reviews** | 38.5% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 8 months |
| Monetization | Free | Free |
| Size | 8 MB | 15 MB |
| Requires iOS | **11.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [IAEA](https://appshunter.io/developer/535500126) | [Chrystian Vieyra](https://appshunter.io/developer/998187453) |

## What reviewers say

### Isotope Browser

[App page](https://appshunter.io/ios/app/isotope-browser/id943890538)

Access comprehensive nuclear data for over 4,000 nuclides and isomers. Explore interactive charts, filter by various criteria, and view detailed information for each nuclide. Data is sourced from reliable resources and available offline.

**Highlights:** Properties of over 4,000 nuclides and isomers, Interactive Chart of Nuclides, Periodic Table of Elements, Filter by half-life, decay mode, radiation type, and energy, Detailed nuclide information with web links, Offline access to embedded database

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

**In-app purchases:** none


### 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 Isotope Browser free?

Isotope Browser 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, Isotope Browser or Physics Toolbox Accelerometer?

Isotope Browser is rated higher. Isotope Browser averages 4.8 out of 5 from 27 ratings, while Physics Toolbox Accelerometer averages 2.0 from 5 ratings.

### Do Isotope Browser or Physics Toolbox Accelerometer have ads?

Neither Isotope Browser nor Physics Toolbox Accelerometer shows ads.

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

Isotope Browser ships an update every 6 weeks, and Physics Toolbox Accelerometer every 8 months. Most recently, Isotope Browser was updated on September 21, 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.*