# Diffraction Grating Calculator vs RayNeo AR

The clearest difference is price: RayNeo AR at Free against Diffraction Grating Calculator's $2.99. RayNeo AR also leads on update cadence (every 2 months vs every 29 months). Diffraction Grating Calculator's advantage is iOS requirement (13 vs 15.5). On ads, in-app purchases and device support there is nothing between them.

RayNeo AR is free to download; Diffraction Grating Calculator costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Diffraction Grating Calculator ships an update every 29 months, RayNeo AR every 2 months. The most recent releases landed on September 29, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Diffraction Grating Calculator | RayNeo AR |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | — | **[2.0 (4 ratings)](https://appshunter.io/ios/app/rayneo-ar/id6476358286/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 7.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 29 months | **Every 2 months** |
| Monetization | — | Free |
| Size | 1 MB | 574 MB |
| Requires iOS | **13** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPod, Apple Watch |
| Age rating | 4+ | 17+ |
| Developer | [Nitrio](https://appshunter.io/developer/321121189) | [RayNeo Hong Kong Limited](https://appshunter.io/developer/1859499611) |

## What reviewers say

### Diffraction Grating Calculator

[App page](https://appshunter.io/ios/app/diffraction-grating-calculator/id1413088894)

**Features:** macOS Compatibility

**In-app purchases:** none


### RayNeo AR

[App page](https://appshunter.io/ios/app/rayneo-ar/id6476358286)

This application connects to AR glasses to provide enhanced control and information display. It enables AR navigation, photo management, and access to various third-party applications directly through the glasses.

**Highlights:** Glasses system control, Real-time status display, AR navigation with route planning, Photo transmission and management, Third-party app integration

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Diffraction Grating Calculator free?

Diffraction Grating Calculator costs $2.99, with no in-app purchases.

### Is RayNeo AR free?

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

### Do Diffraction Grating Calculator or RayNeo AR have ads?

Neither Diffraction Grating Calculator nor RayNeo AR shows ads.

### Which is updated more often, Diffraction Grating Calculator or RayNeo AR?

Diffraction Grating Calculator ships an update every 29 months, and RayNeo AR every 2 months. Most recently, Diffraction Grating Calculator was updated on September 29, 2026 and RayNeo AR on October 7, 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.*