# OSpectrometer vs SIAMoto

The clearest difference is in-app purchases: SIAMoto at none against OSpectrometer's 2. SIAMoto also leads on iOS requirement (13.4 vs 15.1). OSpectrometer's advantage is update cadence (every 2 weeks vs every 6 weeks). On price, ads and device support there is nothing between them.

Both are free to download. OSpectrometer sells 2 in-app purchases, starting at $2.99 per month. SIAMoto asks for nothing beyond the download.

OSpectrometer ships an update every 2 weeks, SIAMoto every 6 weeks. The most recent releases landed on October 15, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | OSpectrometer | SIAMoto |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.0 (4 ratings)](https://appshunter.io/ios/app/ospectrometer/id6446124449/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 6 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 71 MB | 67 MB |
| Requires iOS | 15.1 | **13.4** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [NANO ELECTRONICS RESEARCH MUHENDISLIK ARASTIRMA GELISTIRME LIMITED SIRKETI](https://appshunter.io/developer/1674573382) | [CERTIO CONCEPT SRL](https://appshunter.io/developer/1737206245) |

## What reviewers say

### OSpectrometer

[App page](https://appshunter.io/ios/app/ospectrometer/id6446124449)

This app uses your device's camera and screen to perform basic optical spectroscopy. Analyze the visible light spectrum of objects, map light wavelengths to RGB values, and save or share your findings. It functions offline without external hardware.

**Highlights:** Visible light spectrum analysis, RGB color value mapping, Wavelength selection and scanning, Front camera reflection sensing, Save and share results, Offline functionality

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| month | $2.99 | per month |
| year | $9.99 | per year |


### SIAMoto

[App page](https://appshunter.io/ios/app/siamoto/id6479753340)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is OSpectrometer free?

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

### Is SIAMoto free?

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

### Do OSpectrometer or SIAMoto have ads?

Neither OSpectrometer nor SIAMoto shows ads.

### Which is updated more often, OSpectrometer or SIAMoto?

OSpectrometer ships an update every 2 weeks, and SIAMoto every 6 weeks. Most recently, OSpectrometer was updated on October 15, 2026 and SIAMoto 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.*