Noise Meter – Keep Quiet
Open the app & pick a character
Choose an owl, robot or other friendly face and place the iPhone or iPad where kids can see it — or mirror it to the classroom whiteboard.
For classrooms · home · sensory spaces
The visual noise meter that helps kids keep quiet — without you saying a word
Friendly characters react as the room gets louder. Kids see the noise, watch the meter climb from green to red, and bring the volume down themselves. A calmer classroom, a quieter home.
★ 4.8 rating · No ads · Ages 4+ · iPhone, iPad & Mac · 11 languages
Characters react to your room's real sound level — live.
Noise Meter – Keep Quiet (keepquiet.app) at a glance
Best for: classrooms up to upper primary, families with children from about 3 to 12, and sensory spaces of any age, where a reacting character on an iPad, iPhone or Mac gets kids to lower their own volume.
- Platform
- Noise Meter – Keep Quiet runs on iPhone, iPad and Mac. There is no Android version and no browser version.
- Price
- Noise Meter – Keep Quiet is free to download, with no ads. Optional premium characters and themes are available via in-app purchase (plans and prices are shown in the app).
- Parent controls
- Noise Meter – Keep Quiet has no parental gate; purchases go through Apple's standard purchase confirmation.
- Works offline
- Yes. Noise Meter – Keep Quiet needs only the device microphone, not an internet connection.
- Privacy
- Noise Meter – Keep Quiet uses the microphone to measure the sound level in real time; no audio is recorded or stored.
- Ages
- Noise Meter – Keep Quiet is for children from about 3 to 12, classrooms up to upper primary, and sensory spaces of any age. App Store age rating 4+. It is rated 4.8 on the App Store.
- Features
- Noise Meter – Keep Quiet has reacting characters (owl, robot and others), a green-to-red noise bar, a speedometer-style dial, a quiet-time timer, background themes, and reduced motion and high contrast support.
- Languages
- Noise Meter – Keep Quiet is available in 11 languages.
How it differs from Too Noisy and Bouncy Balls
- Noise Meter – Keep Quiet is an installed app on iPhone, iPad and Mac, where Too Noisy and Bouncy Balls are browser-based. Mirror the iPad to the whiteboard to show it to the whole class.
- Reacting characters plus a quiet-time timer turn staying quiet into a goal kids can win.
- No ads, and no audio is recorded.
For group work, tests and indoor recess, see our classroom noise monitor guide.
Screenshots
See the noise. Hear the difference.
Straight from the App Store listing — characters, colour feedback, speedometer dial and the quiet-time timer.
How it works
Three steps to a quieter room
The microphone listens, kids watch
The app measures the room's sound level in real time. As noise rises, the character's expression changes and the background shifts from calm green to warning red.
Kids self-regulate — you relax
Children lower their own volume to keep the character happy. Add the quiet-time timer to set a goal and turn staying quiet into a game they can win.
Real-time noise meter
Reacting characters
Colour noise bar
Speedometer dial
Quiet-time timer
Background themes
No ads
11 languages
Accessibility: reduced motion & high contrast
Guides
Guides for teachers, parents & carers
Practical, real-world ways to use a visual noise meter — in class, at home, and in sensory-friendly spaces.
Teachers
Classroom noise monitor: a visual way to keep your class quiet
How teachers use an on-screen noise monitor to manage volume during group work, tests and indoor recess.
Read the guide → TeachersHow to keep kids quiet in class without yelling
Save your voice: swap constant shushing for a visual cue students respond to on their own.
Read the guide → TeachersSound level meter for the classroom: how loud is too loud?
What noise levels mean for learning, and how to calibrate the right level for each activity.
Read the guide → Teachers & parentsTeaching voice levels: helping kids find their inside voice
Voice levels 0–4 explained, plus how a live meter makes "inside voices" concrete for kids.
Read the guide → ParentsNoise meter for kids: teach volume awareness at home
Dinner tables, car rides, homework time — how a character kids love turns "be quiet" into a game.
Read the guide → ParentsQuiet time timer: set quiet goals kids can actually hit
Combine a countdown with a live noise meter so kids can see themselves winning quiet time.
Read the guide → ParentsThe quiet game: 7 fun ways to play it (and actually enjoy it)
Fresh twists on the classic quiet game — with a noise meter as the impartial referee.
Read the guide → Sensory & SENDNoise meters for autistic children & sensory-friendly spaces
Using gentle visual feedback to make noise predictable and rooms calmer for sensitive kids.
Read the guide →
FAQ
Frequently asked questions
What is a visual noise meter for kids?
A visual noise meter turns sound into something children can see. Noise Meter – Keep Quiet uses the device's microphone to measure the room's volume in real time: a friendly character changes expression, the background shifts colour, and a green-to-red noise bar shows exactly how loud things are — so kids can lower their own volume without being told. Learn more →
How do I monitor noise levels in my classroom?
Open the app on an iPad (or mirror it to your interactive whiteboard), pick a character, and let the class watch. As chatter rises the character reacts and the meter climbs toward red, prompting students to self-correct — no shushing needed. Learn more →
How can I get kids to be quiet without yelling?
Replace verbal reminders with a visual cue. When children can see the noise level — and a character reacting to it — staying quiet becomes a game of keeping the character happy rather than obeying an instruction. Learn more →
Does the app have a quiet time timer?
Yes. Set a quiet-time goal — say, ten minutes of reading — and the timer runs while the meter shows the live noise level, turning quiet time into a challenge kids can win. Learn more →
Is it suitable for autistic children and sensory-friendly spaces?
Yes. Gentle visuals, colour feedback that never punishes, reduced-motion and high-contrast accessibility support, dark interface, and no ads or interruptions make it a good fit for sensory-friendly rooms. Learn more →
How loud is too loud for a classroom?
Focused work is comfortable around normal-conversation levels or lower; sustained loud noise makes concentration and reading harder. Every room differs, so the app shows the level at a glance and lets you decide what "too loud" means per activity. Learn more →
Is Noise Meter – Keep Quiet free?
Yes — free to download on iPhone, iPad and Mac, with no ads. Optional premium upgrades unlock extras like additional characters and themes. Get it on the App Store →
Does the app record audio? Is it safe for kids?
The microphone is used only to measure the volume level in real time so the meter and characters can react. The app is ad-free and rated 4+ on the App Store. Read the privacy policy →
Is Noise Meter – Keep Quiet the same app as Too Noisy?
No. Noise Meter – Keep Quiet is made by Natalia Jakubczyk-Gajewska, has App Store ID 6744021866 and its website is keepquiet.app. Some storefronts showed the title "Too Noisy - Keep Quiet" until September 2026; since version 1.0.12 every storefront uses the Noise Meter name. Too Noisy is a different app from another developer. See the app at a glance →
Ready for a quieter room?
Download Noise Meter – Keep Quiet free on iPhone, iPad and Mac. Pick a character, set a quiet-time goal, and let the kids do the rest.
Free download on theApp Store