# OSpectrometer vs TourBuilder WalkAR

The clearest difference is in-app purchases: TourBuilder WalkAR at none against OSpectrometer's 2. OSpectrometer's advantage is update cadence (every 2 weeks vs every 23 months). On price, ads, 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. TourBuilder WalkAR asks for nothing beyond the download.

OSpectrometer ships an update every 2 weeks, TourBuilder WalkAR every 23 months. The most recent releases landed on November 3, 2026 and November 12, 2026 respectively.

## The numbers

| Metric | OSpectrometer | TourBuilder WalkAR |
| --- | --- | --- |
| 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 23 months |
| Monetization | Free with in-app purchases | — |
| Size | 71 MB | 5 MB |
| Requires iOS | **15.1** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [NANO ELECTRONICS RESEARCH MUHENDISLIK ARASTIRMA GELISTIRME LIMITED SIRKETI](https://appshunter.io/developer/1674573382) | [ARtGlass USA LLC](https://appshunter.io/developer/1670104939) |

## 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 |


### TourBuilder WalkAR

[App page](https://appshunter.io/ios/app/tourbuilder-walkar/id6448917197)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is OSpectrometer free?

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

### Is TourBuilder WalkAR free?

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

### Do OSpectrometer or TourBuilder WalkAR have ads?

Neither OSpectrometer nor TourBuilder WalkAR shows ads.

### Which is updated more often, OSpectrometer or TourBuilder WalkAR?

OSpectrometer ships an update every 2 weeks, and TourBuilder WalkAR every 23 months. Most recently, OSpectrometer was updated on November 3, 2026 and TourBuilder WalkAR on November 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.*