# Diffraction Grating Calculator vs AI Background Noise Reducer

The clearest difference is price: AI Background Noise Reducer at Free against Diffraction Grating Calculator's $2.99. AI Background Noise Reducer also leads on update cadence (every 12 months vs every 29 months). Diffraction Grating Calculator's advantage is in-app purchases (none vs 2). On ads, device support and iOS requirement there is nothing between them.

AI Background Noise Reducer is free to download; Diffraction Grating Calculator costs $2.99 up front. AI Background Noise Reducer sells 2 in-app purchases, starting at $2.99 per month. Diffraction Grating Calculator asks for nothing beyond the download.

Diffraction Grating Calculator ships an update every 29 months, AI Background Noise Reducer every 12 months. The most recent releases landed on September 29, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Diffraction Grating Calculator | AI Background Noise Reducer |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Positive reviews | — | 16.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 29 months | **Every 12 months** |
| Monetization | — | Freemium |
| Size | 1 MB | 147 MB |
| Requires iOS | **13** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nitrio](https://appshunter.io/developer/321121189) | [Naresh Jagani](https://appshunter.io/developer/1681361262) |

## What reviewers say

### Diffraction Grating Calculator

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

**Features:** macOS Compatibility

**In-app purchases:** none


### AI Background Noise Reducer

[App page](https://appshunter.io/ios/app/ai-background-noise-reducer/id6447455081)

Effortlessly remove unwanted background noise from your audio and video recordings. This tool offers advanced AI-powered noise reduction, audio editing, and file management, ensuring professional-sounding content. Your data remains private as all processing occurs on your device.

**Highlights:** AI background noise removal, Audio and video noise reduction, Audio editor, Voice editor, File management (sort, delete), On-device processing for privacy

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited access | $2.99 | per month |
| Unlimited access | $29.99 | per year |


## Frequently asked questions

### Is Diffraction Grating Calculator free?

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

### Is AI Background Noise Reducer free?

AI Background Noise Reducer is free to download, with in-app purchases available.

### Do Diffraction Grating Calculator or AI Background Noise Reducer have ads?

Neither Diffraction Grating Calculator nor AI Background Noise Reducer shows ads.

### Which is updated more often, Diffraction Grating Calculator or AI Background Noise Reducer?

Diffraction Grating Calculator ships an update every 29 months, and AI Background Noise Reducer every 12 months. Most recently, Diffraction Grating Calculator was updated on September 29, 2026 and AI Background Noise Reducer on October 4, 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.*