# Isotope Browser vs CBRNResponder

The clearest difference is update cadence: CBRNResponder at weekly against Isotope Browser's every 6 weeks. Isotope Browser's advantage is rating (4.8 vs 4.5) and ratings volume (27 vs 6). 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 4.5. Both are backed by a comparable volume of ratings — 27 and 6 respectively.

Isotope Browser ships an update every 6 weeks, CBRNResponder weekly. The most recent releases landed on September 21, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | Isotope Browser | CBRNResponder |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (27 ratings)](https://appshunter.io/ios/app/isotope-browser/id943890538/reviews)** | [4.5 (6 ratings)](https://appshunter.io/ios/app/cbrnresponder/id1540310984/reviews) |
| Number of ratings | **27** | 6 |
| Positive reviews | 82.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Weekly** |
| Monetization | Free | Free |
| Size | 8 MB | 27 MB |
| Requires iOS | **11.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [IAEA](https://appshunter.io/developer/535500126) | [Attainx Inc.](https://appshunter.io/developer/1403638152) |

## 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


### CBRNResponder

[App page](https://appshunter.io/ios/app/cbrnresponder/id1540310984)

This app offers free tools for logging, transmitting, storing, and analyzing environmental monitoring data. It provides a secure cloud environment for user data access and requires registration for full functionality.

**Highlights:** Environmental data logging, Data transmission capabilities, Secure cloud data storage, Data analysis tools, Data presentation features

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

**In-app purchases:** none


## Frequently asked questions

### Is Isotope Browser free?

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

### Is CBRNResponder free?

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

### Which has better reviews, Isotope Browser or CBRNResponder?

Isotope Browser is rated higher. Isotope Browser averages 4.8 out of 5 from 27 ratings, while CBRNResponder averages 4.5 from 6 ratings.

### Do Isotope Browser or CBRNResponder have ads?

Neither Isotope Browser nor CBRNResponder shows ads.

### Which is updated more often, Isotope Browser or CBRNResponder?

Isotope Browser ships an update every 6 weeks, and CBRNResponder weekly. Most recently, Isotope Browser was updated on September 21, 2026 and CBRNResponder on September 15, 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.*