# OSpectrometer vs Poket Deck

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

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

OSpectrometer ships an update every 2 weeks, Poket Deck every 2 days. The most recent releases landed on September 10, 2026 and December 23, 2025 respectively.

## The numbers

| Metric | OSpectrometer | Poket Deck |
| --- | --- | --- |
| 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** | Yes |
| Update frequency | Every 2 weeks | **Every 2 days** |
| Monetization | Free with in-app purchases | — |
| Size | 71 MB | 36 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [NANO ELECTRONICS RESEARCH MUHENDISLIK ARASTIRMA GELISTIRME LIMITED SIRKETI](https://appshunter.io/developer/1674573382) | [Juan Chavarro](https://appshunter.io/developer/1650286585) |

## 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 |


### Poket Deck

[App page](https://appshunter.io/ios/app/poket-deck/id6738365032)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is OSpectrometer free?

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

### Is Poket Deck free?

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

### Do OSpectrometer or Poket Deck have ads?

Poket Deck shows ads; OSpectrometer does not.

### Which is updated more often, OSpectrometer or Poket Deck?

OSpectrometer ships an update every 2 weeks, and Poket Deck every 2 days. Most recently, OSpectrometer was updated on September 10, 2026 and Poket Deck on December 23, 2025.

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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.*