AudioVisualizer vs Spectrum

Don't just listen to your music—watch it come alive. AudioVisualizer brings the mesmerizing glow of 1980s and 1990s golden-era stereo equalizers and iconic car audio systems to your iPhone. Faithfully emulating classic Vacuum Fluorescent Displays (VFD), this native visualizer transforms sound into captivating, real-time light shows. Visualize ambient music through your microphone, or import lossless FLAC and hi-res audio files directly from the Files app for seamless queue playback. KEY FEATURES: ◆ 3 Iconic Visualizer Skins • Classic (10-Band): The timeless aesthetic of home hi-fi components with smooth, authentic phosphor bars. • 3D Car Audio (90s VFD): Relive midnight highway cruises with immersive 3D perspective display emulation. • 3D Car Audio (Trapezoid): An electrifying inverted-trapezoid arena layout capturing explosive bass and treble dynamics. ◆ Native Audio Engine with Fluid 60fps Performance • Powered by Apple's Accelerate framework and Metal for ultra-low latency FFT frequency analysis. • Millisecond-accurate ballistics simulating physical attack, decay, and peak-hold phosphor physics. ◆ Lossless Audio File & Folder Playback • Import audio files (FLAC, WAV, ALAC, MP3, AAC) directly from your device or iCloud. • Add entire folders with one tap to create seamless playback queues. • Full support for background playback, lock screen controls, and repeat modes. ◆ Deep Customization (81 Color Combinations) • 9 vibrant phosphor colors for bars and peak markers: White, Cyan, Green, Blue, Purple, Pink, Orange, Yellow, and Red. • Adjustable segment resolution from 10 to 100 levels. • Fine-tune rise speed, fall speed, and peak hold duration. • Independent sensitivity gains for microphone and file playback. Perfect as desk decor, a companion for late-night listening sessions, or rediscovering your favorite records. Turn your iPhone into a piece of timeless audio craftsmanship.

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.