# InterSpec Radiation Analysis vs RAYSID

The clearest difference is rating: RAYSID at 5.0 against InterSpec Radiation Analysis's 4.2. RAYSID also leads on update cadence (weekly vs every 11 months). InterSpec Radiation Analysis's advantage is ratings volume (10 vs 1) and device support (3 vs 1). 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.

RAYSID holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: InterSpec Radiation Analysis has 10 ratings behind it against 1, so its average is the more settled of the two.

InterSpec Radiation Analysis ships an update every 11 months, RAYSID weekly. The most recent releases landed on October 1, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | InterSpec Radiation Analysis | RAYSID |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (10 ratings)](https://appshunter.io/ios/app/interspec-radiation-analysis/id1447080767/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/raysid/id6763330523/reviews)** |
| Number of ratings | **10** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Weekly** |
| Monetization | Free | Free |
| Size | 80 MB | 145 MB |
| Requires iOS | **11.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [William Johnson](https://appshunter.io/developer/1447080766) | [Isai Olvera](https://appshunter.io/developer/1895267343) |

## 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


### RAYSID

[App page](https://appshunter.io/ios/app/raysid/id6763330523)

This app connects to a RAYSID gamma spectrometer via Bluetooth to display real-time radiation data. It offers detailed spectrum analysis, automatic isotope identification, and customizable device alarms. Data is stored locally on your phone.

**Highlights:** Real-time count rate and dose rate, Automatic isotope identification, High-resolution spectrum analysis, Device threshold alarms with notifications, Export spectrum data to N42 file, Phone-side Geiger clicks

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

**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 RAYSID free?

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

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

RAYSID is rated higher. InterSpec Radiation Analysis averages 4.2 out of 5 from 10 ratings, while RAYSID averages 5.0 from 1 ratings.

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

Neither InterSpec Radiation Analysis nor RAYSID shows ads.

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

InterSpec Radiation Analysis ships an update every 11 months, and RAYSID weekly. Most recently, InterSpec Radiation Analysis was updated on October 1, 2026 and RAYSID on October 6, 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.*