# SpectralViewer, spectraView vs Arduino Programming Tutorial

The clearest difference is ads: SpectralViewer, spectraView at none against Arduino Programming Tutorial's shown. SpectralViewer, spectraView also leads on review sentiment (67% vs 45%) and monetization model (free vs ad-supported). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

SpectralViewer, spectraView ships an update every 3 weeks, Arduino Programming Tutorial every 6 weeks. Both last shipped on October 12, 2026.

## The numbers

| Metric | SpectralViewer, spectraView | Arduino Programming Tutorial |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (4 ratings)](https://appshunter.io/ios/app/spectralviewer-spectraview/id1201249094/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | **66.7% of reviews** | 45.5% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 3 weeks** | Every 6 weeks |
| Monetization | **Free** | Ad-supported |
| Size | 13 MB | 44 MB |
| Requires iOS | **9.2** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Junichi Watanabe](https://appshunter.io/developer/1014493824) | [ALG Software Lab](https://appshunter.io/developer/1650561236) |

## What reviewers say

### 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


### Arduino Programming Tutorial

[App page](https://appshunter.io/ios/app/arduino-programming-tutorial/id6446804186)

Learn Arduino programming with over 200 lessons, circuit diagrams, and code examples. Covers electronics, components, and C++ essentials for beginners and advanced users. Available in 14 languages.

**Highlights:** 200+ practical lessons, Circuit diagrams and wiring guides, Ready-to-use code examples, Interactive quiz questions, Covers 14 languages, Detailed component explanations, C++ programming essentials

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

**In-app purchases:** none


## Frequently asked questions

### Is SpectralViewer, spectraView free?

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

### Is Arduino Programming Tutorial free?

Arduino Programming Tutorial is free to download, with no in-app purchases.

### Do SpectralViewer, spectraView or Arduino Programming Tutorial have ads?

Arduino Programming Tutorial shows ads; SpectralViewer, spectraView does not.

### Which is updated more often, SpectralViewer, spectraView or Arduino Programming Tutorial?

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