# InterSpec Radiation Analysis vs GMCMap

InterSpec Radiation Analysis and GMCMap both sit at 4.2 stars, but that hides the real split: 100% of InterSpec Radiation Analysis's written reviews are positive against 70% of GMCMap's. InterSpec Radiation Analysis also leads on iOS requirement (11.0 vs 15.1). GMCMap's advantage is update cadence (every 5 months vs every 11 months). On price, rating, ratings volume 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.

On the App Store both sit at effectively the same score — 4.2 for InterSpec Radiation Analysis against 4.1 for GMCMap. Both are backed by a comparable volume of ratings — 10 and 19 respectively. Written reviews are what separate them: 100% of InterSpec Radiation Analysis's written reviews are positive against 70% of GMCMap's.

InterSpec Radiation Analysis ships an update every 11 months, GMCMap every 5 months. The most recent releases landed on September 13, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | InterSpec Radiation Analysis | GMCMap |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (10 ratings)](https://appshunter.io/ios/app/interspec-radiation-analysis/id1447080767/reviews)** | [4.1 (19 ratings)](https://appshunter.io/ios/app/gmcmap/id6459882680/reviews) |
| Number of ratings | 10 | **19** |
| Positive reviews | **100.0% of reviews** | 70.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 5 months** |
| Monetization | Free | Free |
| Size | 80 MB | 27 MB |
| Requires iOS | **11.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [William Johnson](https://appshunter.io/developer/1447080766) | [GQ Electronics LLC](https://appshunter.io/developer/1379843069) |

## What reviewers say

### InterSpec Radiation Analysis

[App page](https://appshunter.io/ios/app/interspec-radiation-analysis/id1447080767)

Analyze nuclear radiation spectral data to identify nuclides, determine source activity, and calculate shielding. Supports various detector file formats and includes tools for dose rate calculations and nuclide decay information.

**Highlights:** Spectral nuclear radiation data analysis, Nuclide identification, Source activity determination, Shielding amount calculation, Spectral file format conversion, Dose rate calculations, Interactive nuclide decay information

**Features:** macOS Compatibility

**In-app purchases:** none


### GMCMap

[App page](https://appshunter.io/ios/app/gmcmap/id6459882680)

This app provides a real-time radiation map of the world, displaying current radiation levels from monitoring stations globally. It features an interactive map, historical data, and trend analysis for comprehensive environmental vigilance.

**Highlights:** Real-time radiation data, Global coverage map, Interactive map interface, Historical data and trends, Mobile convenience

**In-app purchases:** none


## Frequently asked questions

### Is InterSpec Radiation Analysis free?

InterSpec Radiation Analysis is free to download, with no in-app purchases.

### Is GMCMap free?

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

### Which has better reviews, InterSpec Radiation Analysis or GMCMap?

InterSpec Radiation Analysis is rated higher. InterSpec Radiation Analysis averages 4.2 out of 5 from 10 ratings, while GMCMap averages 4.1 from 19 ratings.

### Do InterSpec Radiation Analysis or GMCMap have ads?

Neither InterSpec Radiation Analysis nor GMCMap shows ads.

### Which is updated more often, InterSpec Radiation Analysis or GMCMap?

InterSpec Radiation Analysis ships an update every 11 months, and GMCMap every 5 months. Most recently, InterSpec Radiation Analysis was updated on September 13, 2026 and GMCMap on September 22, 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.*