# Isotope Browser vs SpectralViewer, spectraView

The clearest difference is rating: Isotope Browser at 4.8 against SpectralViewer, spectraView's 3.8. Isotope Browser also leads on review sentiment (83% vs 67%) and ratings volume (27 vs 4). SpectralViewer, spectraView's advantage is update cadence (every 3 weeks vs every 6 weeks) and iOS requirement (9.2 vs 11.0). 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 3.8. That said, the two scores are not equally well evidenced: Isotope Browser has 27 ratings behind it against 4, 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 67% of SpectralViewer, spectraView's.

Isotope Browser ships an update every 6 weeks, SpectralViewer, spectraView every 3 weeks. Both last shipped on October 24, 2026.

## The numbers

| Metric | Isotope Browser | SpectralViewer, spectraView |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (27 ratings)](https://appshunter.io/ios/app/isotope-browser/id943890538/reviews)** | [3.8 (4 ratings)](https://appshunter.io/ios/app/spectralviewer-spectraview/id1201249094/reviews) |
| Number of ratings | **27** | 4 |
| Positive reviews | **82.6% of reviews** | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 8 MB | 13 MB |
| Requires iOS | 11.0 | **9.2** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [IAEA](https://appshunter.io/developer/535500126) | [Junichi Watanabe](https://appshunter.io/developer/1014493824) |

## 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


### SpectralViewer, spectraView

[App page](https://appshunter.io/ios/app/spectralviewer-spectraview/id1201249094)

Utilize your device's camera to capture and analyze spectrum images from a spectrometer. Measure spectral intensity, plot light distribution, and calibrate wavelength scales. Save your spectral data as images.

**Highlights:** Measure spectral intensity with device camera, Analyze spectrum images, Plot light intensity distribution, Calibrate wavelength scales, Save spectral plots as images, Adjust plot scale

**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 SpectralViewer, spectraView free?

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

### Which has better reviews, Isotope Browser or SpectralViewer, spectraView?

Isotope Browser is rated higher. Isotope Browser averages 4.8 out of 5 from 27 ratings, while SpectralViewer, spectraView averages 3.8 from 4 ratings.

### Do Isotope Browser or SpectralViewer, spectraView have ads?

Neither Isotope Browser nor SpectralViewer, spectraView shows ads.

### Which is updated more often, Isotope Browser or SpectralViewer, spectraView?

Isotope Browser ships an update every 6 weeks, and SpectralViewer, spectraView every 3 weeks. Most recently, Isotope Browser was updated on October 24, 2026 and SpectralViewer, spectraView on October 24, 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.*