# Class Noise vs USD 447

The clearest difference is price: USD 447 at Free against Class Noise's $1.99. USD 447 also leads on update cadence (every 3 months vs every 14 months). Class Noise's advantage is chart position (#198 vs unranked). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

USD 447 is free to download; Class Noise costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Class Noise ships an update every 14 months, USD 447 every 3 months. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Class Noise | USD 447 |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 3 months** |
| Monetization | Paid | — |
| Best chart rank | **#198** | — |
| Size | 7 MB | 143 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Johandre Delgado Moreno](https://appshunter.io/developer/1289898741) | [Unified School District 447 Cherryvale](https://appshunter.io/developer/1687562485) |

## What reviewers say

### Class Noise

[App page](https://appshunter.io/ios/app/class-noise-quiet-classroom/id1484667324)

**Currently charting:** #198 Top Paid · Education (US App Store)

This app helps teachers manage classroom noise by visually indicating sound levels and rewarding students for quieting down. It gamifies classroom management, making it easier to capture attention and maintain focus without constant verbal reminders. Enjoy a calm and productive learning environment.

**Highlights:** Monitors sound levels, Rewards students for quiet, Gamified approach, Adjustable sensitivity, Variety of feedback animations, Works offline, Ad-free and private

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### USD 447

[App page](https://appshunter.io/ios/app/usd-447/id6449045794)

**In-app purchases:** none


## Frequently asked questions

### Is Class Noise free?

Class Noise costs $1.99, with no in-app purchases.

### Is USD 447 free?

USD 447 is free to download, with no in-app purchases.

### Do Class Noise or USD 447 have ads?

Neither Class Noise nor USD 447 shows ads.

### Which is updated more often, Class Noise or USD 447?

Class Noise ships an update every 14 months, and USD 447 every 3 months. Most recently, Class Noise was updated on October 29, 2026 and USD 447 on October 30, 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.*