# Isotope Browser vs Rad Onc Calc

The clearest difference is rating: Isotope Browser at 4.8 against Rad Onc Calc's 4.6. Isotope Browser also leads on iOS requirement (11.0 vs 14.0). On price, ratings volume, update cadence and ads 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 4.6. Both are backed by a comparable volume of ratings — 27 and 12 respectively.

Both ship on a similar rhythm, roughly every 6 weeks. The most recent releases landed on October 24, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Isotope Browser | Rad Onc Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (27 ratings)](https://appshunter.io/ios/app/isotope-browser/id943890538/reviews)** | [4.6 (12 ratings)](https://appshunter.io/ios/app/rad-onc-calc/id1494077153/reviews) |
| Number of ratings | **27** | 12 |
| Positive reviews | 82.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | Every 6 weeks |
| Monetization | Free | Free |
| Size | 8 MB | 57 MB |
| Requires iOS | **11.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [IAEA](https://appshunter.io/developer/535500126) | [Matthew Culbert](https://appshunter.io/developer/1435398886) |

## 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


### Rad Onc Calc

[App page](https://appshunter.io/ios/app/rad-onc-calc/id1494077153)

A radiation oncology calculator and reference tool for medical professionals. It provides quick access to essential calculations and treatment constraints.

**Highlights:** Radiation oncology calculations, Treatment constraints reference, Quick access to essential data, Comprehensive tool for professionals

**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 Rad Onc Calc free?

Rad Onc Calc is free to download, with no in-app purchases.

### Which has better reviews, Isotope Browser or Rad Onc Calc?

Isotope Browser is rated higher. Isotope Browser averages 4.8 out of 5 from 27 ratings, while Rad Onc Calc averages 4.6 from 12 ratings.

### Do Isotope Browser or Rad Onc Calc have ads?

Neither Isotope Browser nor Rad Onc Calc shows ads.

### Which is updated more often, Isotope Browser or Rad Onc Calc?

Isotope Browser ships an update every 6 weeks, and Rad Onc Calc every 6 weeks. Most recently, Isotope Browser was updated on October 24, 2026 and Rad Onc Calc on October 21, 2026.

---

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