mimigarKEEN
Ultrasonic SPL meter
Only for iPhone
Free
iPhone
KEEN is a sound pressure level (SPL) meter specialized for the 18–20 kHz ultrasonic band. It lets you easily check sounds near the upper limit of the audible range — often outside the scope of ordinary sound level meters — using an iPhone and a measurement microphone.
FEATURES
- Real-time sound pressure level (dB SPL) display for the 18–20 kHz band
- Switchable time weighting (Fast 125 ms / Slow 1000 ms)
- Supports USB measurement microphones (such as the Dayton Audio iMM-6C)
- Automatically applies per-microphone calibration data
- Detects the microphone's serial number on connection and fetches its registered calibration data
- Also supports entering the identifier printed on the microphone or scanning its QR code
- Calibration files can be imported as well
- Manual calibration with a pistonphone (94 dB SPL @ 1 kHz)
NOTES
- For accurate measurement in the 18–20 kHz band, we recommend using a supported external measurement microphone with its calibration data applied (high-frequency sensitivity is not guaranteed with the built-in microphone).
- Microphone access permission is required for measurement.
Ratings & Reviews
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The developer, Evixar Inc., 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 Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Evixar Inc.
- Size
- 713.7 KB
- Category
- Utilities
- Compatibility
Requires iOS 16.0 or later.
- iPhone
Requires iOS 16.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Evixar Inc.