Spectrum Lab vs Spectrum

A real-time audio spectrum analyzer with a fast, responsive display. Monitor live frequencies from any input source, including built-in microphones, USB devices, and Bluetooth audio. Peak detection helps you track signal changes instantly and see how your signal evolves over time. Use it to analyze music, inspect mixes, and understand the frequency balance of tracks in real time. Check how different environments affect sound, identify noise or unwanted frequencies, and get a clear view of what your microphone is actually capturing. Test speakers, headphones, and audio equipment to see how they respond across the frequency range. Useful for quick checks, setup validation, and comparing different devices or signal paths. Also helpful during development and debugging - visualize audio output, verify signal presence, and monitor changes instantly without needing complex tools. Designed to be simple and direct: no manual configuration, no unnecessary controls. Just open the app, select your input, and start analyzing. No setup required. Everything runs automatically.

Spectrum turns your phone into a modern real-time audio analyzer - the clean, fast tool that older spectrum apps never gave you. See sound the moment it happens: a live FFT frequency spectrum and a scrolling spectrogram (waterfall), with automatic peak detection and the matching musical note. Built for a phone screen, with a beautiful dark and light theme - not a cramped desktop port. WHY SPECTRUM • Modern, readable interface - designed for touch, dark & light themes • Save your measurements and revisit them anytime (most analyzers forget everything the moment you close them) • Export the spectrogram as a high-resolution image, or your data as CSV • Works on both iPhone and iPad • Real peak frequency + musical note readout, in cents FEATURES • Real-time FFT spectrum, log or linear frequency axis • Spectrogram (waterfall) view • Tap the chart for a frequency cursor with dB and musical note • Peak hold and peak-frequency tracking • Musical note detection (A4 = 440 Hz) • A-weighting for perceived loudness • Adjustable FFT size (2048 / 4096 / 8192) • Save, name and organize measurements • Image & CSV export • 8 languages SPECTRUM PRO - one-time purchase, no subscription • 1/3 octave RTA view with per-band peak hold - the classic real-time analyzer used for live sound and room tuning • Tone generator: sine tones, 20 Hz-20 kHz logarithmic sweep, white & pink noise for testing speakers and room acoustics • Peak list: the strongest peaks with harmonics tagged • Up to 4 frequency markers on the chart • Calibration offset (±20 dB) to match a reference meter • Extra-high resolution 16384 FFT • High-resolution image export and no ads, forever Everything is processed on your device - no audio is ever uploaded. Microphone access is the only permission needed. Perfect for musicians, audio engineers, students, DIY speaker builders, hum & noise hunters, and anyone curious about the sounds around them.