App directory
Decibel X
SkyPaw Co., Limited
Decibel X measures environmental sound levels with a supported iPhone/iPad microphone setup.
What Decibel X does
Decibel X provides sound-level readings, measurement history and a dosimeter workflow. Its iOS listing describes Health export, CSV sharing, calibration controls and light/dark display themes. These are documented tools rather than a HearingTracker measurement-accuracy assessment; microphone calibration and the exact phone remain important.
How it compares
Noise-dose tracking, like NIOSH, plus saved readings
Like NIOSH Sound Level Meter, Decibel X includes a way to track noise dose. It also offers measurement history and CSV export if you want to keep or share readings.
Features
Hearing checks & protection
- Supported: Apple Health integration
- Supported: Sound-level measurement
- Supported: Noise-exposure dose
- Supported: Microphone calibration
- Conditional: Noise-data export4
- Supported: Noise metricsLAeq · Maximum
Availability & access
- Conditional: Trial access1
Accessibility
- Supported: Dark appearance
- Supported: Landscape display
- Annual membership advertises a trial; duration, payment conditions and eligibility are unestablished.
- Applies to the documented iCloud history-synchronization option, not an assertion about every data category.
- Documented for saved recordings in the Data tab; cloud/export copies may require separate removal.
- Data Export is listed as a paid IAP and premium subscriptions unlock full access; the current entitlement boundary, including legacy purchases, is not established.
App Store ratings & reviews
Praise
- In the June 2025–November 2026 sample, users praised quick noise checks, readable levels and the frequency display for music, venues, workplaces and home use. These are subjective utility reports, not validation of measurement accuracy or hearing protection.
Complaints
- Comments through November 2026 objected to subscription cost, trial/onboarding prompts and difficulty finding the free mode. Several alleged unwanted charges or trouble cancelling; others explicitly reported usable free features, so this sample does not establish that payment is mandatory.
- Users reported startup freezes, crashes or difficult recording navigation in 2025–2026. A September 2025 reviewer said version 9.9.3 fixed a crash; later January–February 2026 failure reports mean that isolated fix cannot be treated as universal.
- Some users reported interference with Bluetooth or other music playback and background microphone/battery activity. These are individual observations from June 2025–October 2026, not proof that recordings were transmitted or that every device behaves this way.
Mixed reports
- Perceived accuracy was mixed: positive comments contrast with a January 2026 report of differing iPhone/iPad readings and a November report of implausibly high readings in quiet surroundings. Neither side is a controlled calibration test.
Google Play ratings & reviews
Praise
- Users across the 2019–2026 sample valued quick sound checks, graphs and the interface for music systems, venues and home noise. This records perceived utility and does not establish calibrated accuracy or protection from hearing damage.
Complaints
- Recent and historical reviewers described freezes, failed updates, recording/export problems and startup failures. A May 2026 comment reported a fix, while other 2026 reports still describe failures; these observations cannot identify a universally working or broken version.
- Comments continuing into 2026 criticized subscriptions, upgrade prompts, adverts and cancellation or billing friction; older most-relevant reviews also raised these concerns. Historical prices in reviews are not used as current pricing evidence.
- Some reviewers reported background microphone activity, battery drain or permission concerns, including a June 2025 battery complaint. Those observations do not verify allegations of data harvesting or transmission.
Mixed reports
- Accuracy reports conflict across devices and environments: some users found readings useful or comparable to another meter, while others reported large differences or missed noise. These unverified comparisons are not laboratory validation and often concern older versions.