# RayLab vs SpectralViewer, spectraView

The clearest difference is rating: RayLab at 4.6 against SpectralViewer, spectraView's 3.8. RayLab also leads on ratings volume (63 vs 4) and review sentiment (75% vs 67%). SpectralViewer, spectraView's advantage is in-app purchases (none vs 10) and ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. RayLab sells 10 in-app purchases, starting at $3.99 per month. SpectralViewer, spectraView asks for nothing beyond the download.

RayLab holds the better App Store score, 4.6 against 3.8. That said, the two scores are not equally well evidenced: RayLab has 63 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 75% of RayLab's written reviews are positive against 67% of SpectralViewer, spectraView's.

RayLab ships an update every 6 weeks, SpectralViewer, spectraView every 3 weeks. The most recent releases landed on October 7, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | RayLab | SpectralViewer, spectraView |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (63 ratings)](https://appshunter.io/ios/app/raylab/id710190065/reviews)** | [3.8 (4 ratings)](https://appshunter.io/ios/app/spectralviewer-spectraview/id1201249094/reviews) |
| Number of ratings | **63** | 4 |
| Positive reviews | **75.0% of reviews** | 66.7% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | **Every 3 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 39 MB | 13 MB |
| Requires iOS | 11.0 | **9.2** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kamyar Ghandi](https://appshunter.io/developer/710190068) | [Junichi Watanabe](https://appshunter.io/developer/1014493824) |

## What reviewers say

### RayLab

[App page](https://appshunter.io/ios/app/raylab/id710190065)

Design and simulate optical systems with this powerful tool. Explore 2D and 3D models, perform advanced ray tracing, and analyze optical performance. Ideal for learning or professional design.

**Highlights:** 2D/3D optical modeling, Geometric ray tracing, Sequential and non-sequential analysis, Advanced optical elements, Polarization ray tracing, Design optimization, Glass catalogs

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| RayLab Pro Subscription | $3.99 | per month |
| RayLab Pro Upgrade | Free | one-time |
| Schott Glass Catalog | $0.99 | one-time |
| Custom Glass Editor | $0.99 | one-time |
| Advanced Optical Elements | $1.99 | one-time |
| Source and Lens Arrays | $1.99 | one-time |
| Solver/Optimizer Module | $3.99 | one-time |
| 3D Modeling | $4.99 | one-time |
| RayLab Pro 2 | $19.99 | one-time |
| RayLab Pro Bundle | $19.99 | one-time |


### 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 RayLab free?

RayLab is free to download, with in-app purchases available.

### Is SpectralViewer, spectraView free?

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

### Which has better reviews, RayLab or SpectralViewer, spectraView?

RayLab is rated higher. RayLab averages 4.6 out of 5 from 63 ratings, while SpectralViewer, spectraView averages 3.8 from 4 ratings.

### Do RayLab or SpectralViewer, spectraView have ads?

RayLab shows ads; SpectralViewer, spectraView does not.

### Which is updated more often, RayLab or SpectralViewer, spectraView?

RayLab ships an update every 6 weeks, and SpectralViewer, spectraView every 3 weeks. Most recently, RayLab was updated on October 7, 2026 and SpectralViewer, spectraView on October 12, 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.*