Decibel Meter & Sound Spectrum
iOS app by Robert Carpenter. Utilities · Robert Carpenter
- Store rating
- 0 / 5
- Store rating count
- 0
- Download price
- Free to download
- In-app purchases
- Unknown
- Version
- 1.2.0
- Listing last refreshed
- 2026-09-08
View the original store listing
Store description excerpt
Turn your iPhone or iPad into a visual sound-analysis console built for sound engineers, DJs, live-event crews, musicians, venue staff, and anyone who needs to see what a room is doing. LIVE SPL METER • Large analog needle and precise digital level • A, B, C, Z, and ITU-R 468 weighting • Fast, Slow, and Impulse response • Minimum, average, maximum, Leq, and peak tracking • Calibration offset and named microphone profiles RTA, FFT, AND WATERFALL • Real-time frequency analysis with RTA and FFT views • Color waterfall history for seeing tones change over time • Feedback, hum, speech, and system-tuning workflows • Peak frequency labels, hold traces, zoom, cursor, and analyzer controls WORKING TOOLS FOR REAL JOBS • Timed measurement sessions with pause and resume • Noise-dose estimates and saved session history • Exportable reports and measurement snapshots • Camera overlay for documenting readings at the source • Loud-noise alerts, Lock Screen Live Activity, and Apple Watch remote • Optional iCloud backup for saved sessions and calibration profiles TRY THE VISUAL DEMO FREE The free download includes an interactive simulated signal so you can explore the meter, analyzer, and interface before buying. The demo does not use the microphone or claim to show real sound. UNLOCK SPECTRUM PRO Live microphone measurement and professional tools require Spectrum Pro. Choose monthly, annual, or lifetime access in the app. Subscriptions include ongoing analyzer improvements, new workflows, and compatibility updates. Existing Lifetime Full Version and valid Seven-Day Pro Pass purchases remain honored. PRIVACY AND ACCURACY Audio is processed on your device. Spectrum does not record or upload microphone audio. iPhone and iPad readings are useful estimates and can be calibrated against a trusted reference, but the app is not an IEC Type 1 or Type 2 instrument and is not a substitute for certified equipment or required occupational-safety, medical, or legal measurements. Terms of Use (Apple Standard EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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