Last updated: November 14, 2026
This privacy policy explains how Quietometer, the classroom noise meter made by Worksheet365, handles your information. It covers both this website (quietometer.com) and the Quietometer app for Android (package com.worksheet365.quietometer).
The short version
- Quietometer uses the microphone only to measure the noise level. Nothing is recorded.
- No audio, no voice and no words are ever saved, sent or shared.
- Your lesson reports stay on your phone. Worksheet365 never receives them.
- There is no account and no sign-in.
- The website shows no ads and uses no tracking cookies. The Android app shows ads from Google AdMob, and Google may collect some device data to show and measure those ads.
Microphone
Quietometer asks for the microphone permission so it can measure how loud the room is, and only while the app is open on the screen. The sound is turned into a single number (the noise level) on your device, many times per second, and then thrown away. No audio, no voice and no words are recorded, stored, sent to us or to anyone else, or used for advertising. The microphone stops when you leave the app. You can refuse or remove the permission at any time in your phone settings.
On the website
The web meter runs entirely in your browser. Your settings (activity, limits and calibration) are saved only in your browser storage on your device. The page loads its fonts from Google Fonts, which receives your IP address as part of any normal web request. The website has no ads, no analytics and no account.
What stays on your phone (Android app)
Your lesson reports (date, length, activity, noise levels, stars) and your settings are saved only on your device. They are not sent to any server. They are deleted if you uninstall the app or clear its data.
Ads (Google AdMob)
The app shows a small banner on the Lessons and Me screens only (never on the meter or the big screen), and rarely a full-screen ad after you close a lesson report. The Google Mobile Ads SDK may collect and share the following data:
- Device or other identifiers (advertising ID)
- Approximate location (from the IP address)
- App interactions
- Diagnostics (crash logs and performance)
This data is used for advertising, analytics and fraud prevention, and is encrypted in transit. Ads never receive any sound or noise level. Ads are limited to content suitable for general audiences. To learn how Google uses this data, see How Google uses information from sites or apps that use its services.
Your choices
Where required by law (for example in the EEA, the UK, Switzerland and some US states), the app asks for your consent before showing personalized ads, using Google’s consent tool. You can change your choice at any time in the app: Me > Ad privacy choices. You can also reset or delete your advertising ID in your phone settings (Google > Ads).
Children
Quietometer is made for teachers and other adults. It is not directed to children under 13 and does not knowingly collect personal information from them. Students may see the meter on the board, but they do not use the app or enter any information.
Security and changes
Because your data stays on your device, it is protected by your phone’s own security (screen lock, encryption). If this policy changes, the new version will be posted on this page with a new date.
Contact
Questions about this policy: contact@worksheet365.com