SignalMetric
LUFS, True Peak & Spectrum
$1.99 · Designed for iPad. Not verified for macOS.
Inspect LUFS, True Peak, FFT components, waveform, dynamics, and 30-second spectral history in one private on-device instrument.
SignalMetric is a focused audio analyzer for musicians, engineers, creators, and anyone who wants to understand a live, imported, or recorded signal.
MEASURE THE SIGNAL
Read RMS and sample peak in dBFS, 4x True Peak estimate in dBTP, Peak Hold, headroom, crest factor, Momentary, Short-Term, and gated Integrated LUFS, Loudness Range, PSR, PLR, estimated SNR, noise floor, DC offset, zero-crossing rate, and clipping events.
FOUR INSTRUMENTS
Monitor combines the essential readings. Spectrum shows a 2048-point FFT across 64 logarithmic bands and separates the six strongest components into frequency-labeled sinusoids. Timeline keeps a bounded 30-second spectral history. Scope presents a triggered 256-bin time-domain envelope.
WORK WITH REAL SOURCES
Start with a permission-free reference signal. Analyze the microphone without creating a file, open audio from Files or another app, or make an explicit local M4A recording with a visible Record state.
HONEST MEASUREMENT
SignalMetric reports digital full-scale and BS.1770-style mono-analysis values. True Peak remains visibly marked as an estimate. The app does not claim calibrated SPL or certified delivery compliance, and uncertain tempo or pitch context is withheld or labeled approximate.
PRIVATE BY CONSTRUCTION
Live Mic is analyzed in memory. Recording starts only after you explicitly tap Record. Imported and recorded files stay local unless you share them. SignalMetric does not upload audio, track, show ads, require an account, or include analytics. Optional feedback is sent only after you submit its form.
ONE FAIR PRICE
Buy once. No subscription and no feature paywall.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, 峻 严, 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
- 峻 严
- Size
- 6.2 MB
- Category
- Music
- 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
- Age Rating
4+
- 4+
- Copyright
- © 2026 Monoware
