Features
Audio input & output
- Supported: Audio inputs2Device microphone · External microphone
Compatibility
- Conditional: Required hardware3iPhone (iOS 15.0 or later) · calibrated external microphone for Type 2 (IEC 61672-3) performanceiOS 15 or later
Hearing checks & protection
- Conditional: Apple Health integration4iOS 15 or later
- Conditional: Sound-level measurement5
- Conditional: Noise-exposure dose5
- Conditional: Microphone calibration5
- Conditional: External measurement microphone5
- Conditional: Noise-data export5
- Supported: Noise metricsLAeq · TWA · Maximum · Peak · Dose · Projected dose
Availability & access
- Supported: Service eligibility1Open access
Privacy & data
- Supported: Audio processingOn device
- Not supported: Audio sent off device
- Evidence: Why did NIOSH develop this app? (p. 3).
- Evidence: Settings Screen > Sound Level Meter (p. 22).
- The App Store lists the app for iPhone only, requiring iOS 15.0 or later. The built-in microphone works; the stated Type 2 compliance applies only with a calibrated external microphone.
- Integration concerns noise/sound-level data for Apple's Health (Hearing) section; the app does not offer a hearing check, so no hearing-test results are written. The listing does not detail which data types are shared.
- Official iOS app. Measurement performance depends on microphone and calibration; external calibrated equipment is required for the stated Type 2 setup.
App Store ratings & reviews
Praise
- Reviewers value convenient, free sound-level readings at home and work.
Complaints
- Two sampled reviewers want frequency-band measurements or clearer guidance on interpreting readings.