SoundGuard vs Tonscape

SoundGuard turns your iPhone into a professional sound level meter with real-time decibel monitoring, background measurement, and deep Apple integration. Whether you need to measure noise at work, document neighborhood disturbances, protect your hearing at concerts, or optimize your speaker setup, SoundGuard gives you instant, accurate dB readings with a beautiful interface. MONITOR NOISE WITHOUT OPENING THE APP Start a recording and go. SoundGuard keeps measuring sound levels in the background and updates your Dynamic Island, Lock Screen, and Home Screen Widget in real time. Check your dB from anywhere on your iPhone. No other decibel meter does this. REAL-TIME SOUND MEASUREMENT Measure sound levels in real time with a precision gauge. See current, minimum, average, and maximum decibel readings at a glance. Compare noise levels with real-world references like light rain, vacuum cleaners, or rock concerts. APPLE HEALTH INTEGRATION Automatically record environmental noise exposure in the Health app to track your hearing health over time. SESSION RECORDING & HISTORY Record sound sessions and review detailed analytics with interactive charts. Track peaks above 85 dB and 100 dB danger thresholds. Export your data as CSV for documentation or professional use. AI-POWERED SESSION SUMMARY Get an intelligent summary of your recording session powered by on-device AI. Understand your noise exposure in plain language. HAPTIC ALERTS Feel a haptic vibration when noise crosses the 85 dB danger threshold. Your iPhone physically warns you when sound levels become harmful. HOME SCREEN WIDGET See your latest sound measurement at a glance with the Home Screen widget. LIGHT & DARK MODE A beautiful, native interface that adapts to your preferred appearance. Designed with SwiftUI for a smooth, responsive experience. NO SUBSCRIPTION. EVER. SoundGuard is free to use with full measurement capabilities. Upgrade to PRO with a single one-time purchase to unlock session history, CSV export, AI summaries, microphone calibration, and more. No recurring fees. No account required. No data collected. Built and designed natively for iPhone.

Tonscape is a precise sine-wave tone generator and real-time spectrum analyzer in one clean app. Dial in any frequency your iPhone can actually produce — from 0.01 Hz up to the hardware Nyquist limit (around 24,000 Hz) — typed to two decimal places or swept with a logarithmic slider. Set the exact pitch you need, control the volume up to full output, and play a pure, continuous sine tone. Then prove it. The built-in microphone spectrum analyzer captures sound in real time and shows you the full frequency spectrum on a live, neon display. A single-frequency detector measures the exact level at any frequency you choose, and a noise-floor comparison tells you whether that frequency is genuinely present above the background — even faint signals buried in noise, thanks to spectral averaging. WHAT YOU CAN DO - Generate exact frequencies to 0.01 Hz, only the ones your device can truly produce - Adjust volume from silent to full power - See a live, averaging FFT spectrum analyzer with peak-hold - Tap the spectrum to probe any frequency independently of the tone you're playing - Get a clear "present / not detected" readout with dB-over-noise - Identify your iPhone model and its estimated speaker range RELAX & SLEEP (Pro) - Binaural beats and isochronic tones with brainwave-band presets (delta, theta, alpha, beta) - White, pink, and brown noise generators - Nature sounds: ocean, rain, wind, stream, campfire - Sleep timer with gentle fade-out, plus background playback so it keeps going with the screen off - One-tap presets: Schumann/earth resonance, Solfeggio, and tuning references SOUND DESIGN (Pro) - Sine, square, triangle, and sawtooth waveforms - Chords and a logarithmic frequency sweep GREAT FOR - Sleep, relaxation, focus, and meditation soundscapes - Testing speakers, headphones, and subwoofers - Checking whether a specific frequency is present in a room or signal - Audio education, tuning references, and equipment checks Note: binaural beats require headphones. Labels for resonance/Solfeggio presets are descriptive only — the app makes no medical or therapeutic claims. Tiny phone speakers roll off at very low and very high frequencies, so some tones may be inaudible through the built-in speaker even though the signal is generated correctly — use headphones or external speakers for the full range.