# QuietLight: Classroom Noise — Sound Level Meter for Teachers

> Sound Level Meter for Teachers (iPhone/iPad app by 励毅 陈.)

- Source: https://appshunter.io/ios/app/quietlight-classroom-noise/id6821919981 (this page in markdown: same URL + `.md`)
- Developer: [励毅 陈](https://appshunter.io/developer/1879658258)
- Category: Education
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.0 · 52 MB
- Languages: American English, Armenian, Azerbaijani, Bulgarian, Croatian, Czech, Danish, Dutch, Estonian, Finnish and 26 more
- Released: 2026-10-30
- Data updated: 2026-10-31

## What is QuietLight?

QuietLight turns your iPad or iPhone into a classroom noise light. The whole class sees one big number and a green / yellow / red color, earns stars for quiet minutes, and hears a gentle chime when it gets too loud. Nothing is recorded – the sound is turned into a number on the device and thrown away.

MADE FOR TEACHERS
• One tap to start a lesson – no set-up, no account
• Measure the room's baseline in 5 seconds; the yellow and red lines set themselves
• Four levels: Silent work, Whisper, Group talk, Free time
• Stars for every 2 quiet minutes; a class goal the whole class can see
• Countdown timer with a soft finish sound
• Chime on red only, at most once every 30 seconds – also through a Bluetooth speaker
• Works next to your slides in Split View; keeps stars and timer when a call interrupts
• Available in 39 languages

FOR THE CLASS
• Big number, readable from the back row
• Themes for primary and secondary classes: Simple, Friendly, Garden, Space Rocket, Dark Minimal, Gradient Light
• Scenes grow with the stars, never with the noise – a loud minute pauses the garden, it never shrinks

QUIETLIGHT PRO (7-day free trial, then yearly – or buy once)
• Several classes, each with its own settings and baseline
• Full history and weekly trends per class
• PDF report for a week or a single lesson – print it or send it to parents
• Teacher's private mode: no number on the screen; your phone buzzes in your pocket (and your Apple Watch too) when it gets loud
• All themes, with new ones every term

PRIVACY
• The microphone is used only to calculate a volume number on this device
• No sound recording or audio upload, no account, no ads
• Lesson statistics stay on the device; delete them any time in Settings
• Optional usage and technical statistics go to Firebase only with your consent; turn them off in Settings → Privacy. No audio, sound levels, or class names are sent
• RevenueCat processes purchase information to unlock Pro and restore purchases
• iOS shows the microphone indicator while a lesson runs – that's normal

The yearly subscription renews automatically unless cancelled at least 24 hours before the end of the period. Manage or cancel it in your Apple ID settings.
Privacy policy: https://www.decibelmeter.org/quietlight/privacy.html
Terms of use: https://www.decibelmeter.org/quietlight/terms.html

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| QuietLight Pro Yearly | $9.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| QuietLight Pro Lifetime | $19.99 | one-time |


## Is QuietLight safe?

Not enough ratings yet to assess QuietLight.

## Is QuietLight legit?

QuietLight: Classroom Noise has limited verification signals. The AppsHunter Legitimacy Score for QuietLight is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 1 release)

### 1.0 — 2026-10-30

No release notes.

## More apps by 励毅 陈

- [Decibel Meter: Noise Recorder](https://appshunter.io/ios/app/decibel-meter-noise-recorder/id6759807523)
- [Receipt Maker: PDF Receipts](https://appshunter.io/ios/app/receipt-maker-pdf-receipts/id6803797651)

All apps by 励毅 陈: https://appshunter.io/developer/1879658258

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-31.*