Calm classrooms, simple pricing. Go Pro for the full toolkit.
Use the noise monitor free, or go Pro at $2.99/month for the full toolkit. The live noise monitor and every other tool work instantly for free. Pro adds AI lesson planning, AI rubric generation, cloud saving, and multi-device sync.
Free plan
Forever free
$0
- Live noise monitor with adjustable thresholds
- 10+ core classroom tools included: every other tool free forever. AI tools require Pro
- No sign-up needed: jump straight in
- Presentation mode: big, clear visuals built for school whiteboards and projectors
- Browser storage: whiteboards and settings stay on this device
- Single device: no cross-device whiteboard sync
Best value
Pro plan
$2.99/month
- Everything in Free, with the full Pro experience
- 30 monthly AI credits across lesson plans, rubrics, worksheets, quizzes, and every future AI tool
- Unlimited whiteboard saving: build boards with any tool as a widget, including noise monitor, seating, lesson plans, rubrics, quizzes, and worksheets, all synced to the cloud
- Multi-device access: laptop, classroom PC, and tablet, all synced
- Priority support whenever you need help
- New tool requests fulfilled within 7 days
Got questions? We have answers!
Can't find what you're looking for? We're here to help.
Can multiple teachers use it at the same time?
Absolutely! Since Classroom Noise Monitor runs entirely in your browser with no account or login required, each teacher can use it independently on their own device. Every classroom session is completely separate. There's no data sharing or interference between users. Each teacher controls their own sensitivity settings and pearl tracking.
How accurate are the decibel readings?
The decibel readings are approximate, designed for relative classroom feedback rather than professional acoustic measurement. Accuracy depends on your device's microphone quality. For classroom management, precise dB numbers aren't needed. Puffy's color-coded reactions (cyan for quiet, yellow for active, red for too loud) give clear visual guidance. The sensitivity slider lets you fine-tune how responsive Puffy is to your specific room.
What if the tool isn't detecting sound?
First, check that your browser has microphone permission. You'll see a prompt when you click Start. If you denied it, check your browser's site settings. Make sure your mic isn't muted in system settings. Try increasing the sensitivity slider. The tool works best in modern browsers like Chrome, Firefox, Safari, or Edge. If problems persist, refresh the page or try a different browser.
Do I need special equipment?
No special equipment needed! The tool works with any device that has a microphone: laptops, tablets, Chromebooks, or desktops with a connected mic. For best results, place the device centrally and display on a screen all students can see, like a projector or Smartboard. Everything runs in your browser. No app to install, no software to maintain.