Decibel Kit: Noise Dosimeter
dB Meter, Spectrum, Noise Dose
Free · In-App Purchases · Designed for iPad. Not verified for macOS.
Decibel Kit is a buy-once acoustic measurement kit that brings a sound level meter, spectrum analysis, a dosimeter and evidence reports together in one app. There is no subscription.
■ Live measuring is all free — and never stops
The dB meter, spectrum (FFT / RTA / octave bands / spectrogram), the NIOSH / OSHA dosimeter, the learning content and the camera dB overlay are free from the start, with no count or time limits.
■ One-time purchase, no subscription
"Pro" is yours forever after a single purchase. No monthly or yearly fees. We never take back a feature you have already unlocked. There is just one purchase screen, and you can close it anytime with the ×.
■ What Pro adds (keep it, prove it, export it)
• Save recordings and history (with audio)
• Export to PDF / CSV / WAV / HTML
• Save evidence photos and videos
• Save calibration profiles
• iCloud sync and Health integration
• Apple Pencil annotation, Before/After compare, trimming
■ Professional analysis
A / C / Z / B / ITU-R 468 weighting, Fast / Slow response, Leq, L10, L90, TWA, peak hold, 1/1 to 1/24 octave bands, adjustable ranges.
■ Numbers you can trust
Save device-specific calibration profiles for free, with a "±N dB" confidence range always on screen.
■ Strong as evidence
Photos and videos with dB, date/time and location burned in, your own notes, a tamper-evident SHA-256 hash, and a region-aware noise-regulation guide — all in one report. Great for neighbor, construction and workplace records.
■ Measure without stopping your music
Measure while music, AirPlay or Bluetooth keeps playing.
■ On iPhone, iPad and Mac
Universal. On large screens you can view the FFT / RTA / spectrogram side by side.
* This app provides hearing-safety guidance only and is not a medical device. It cannot be used for diagnosis or treatment.
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
Stability improvements and minor refinements.
The developer, Signet LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
- Identifiers
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- Signet LLC
- Size
- 21.9 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 5 more
- English, French, German, Japanese, Korean, Simplified Chinese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Decibel Kit Pro ฿99.00
- Copyright
- © 2026 Signet LLC