Audiophilio is the professional audio toolkit for the serious listener — a complete suite of measurement tools, room design, and system planning, engineered for iPhone, iPad, and Mac. NOW IN 1.6: SHARED TEST TRACKS Share the reference tracks you use to evaluate your gear — and discover everyone else's. Paste a link from any service and Audiophilio resolves it across Apple Music, Spotify, Tidal, Deezer, and Amazon Music automatically — and you can add Qobuz and YouTube links by hand — so anyone can open it in the app they already use. Each share carries a "what to listen for" note, an optional timestamp, and test-attribute tags (soundstage, sub-bass, imaging, vocals, micro-detail, dynamics, and more). Tracks play right in the app: a 30-second preview for everyone, or the full track for Apple Music subscribers. MEASURE • SPL Meter — real-time sound pressure levels with A/B/C/Z weighting and peak hold • Real-Time Analyzer — 1/3-octave spectrum analysis, live • LUFS Meter — momentary, short-term, and integrated K-weighted loudness • Waterfall Plot — scrolling spectrogram with an interactive 3D view to spot room modes and decay • Spectrogram — 2D frequency map for resonances and flutter echo • Oscilloscope — live triggered waveform display • Frequency Response & PEQ — log-sweep measurement with up to 32 parametric EQ suggestions (peak, dip, high/low shelf); REW, MiniDSP, and Equalizer APO export • RT60 Measurement — reverberation time per octave band • Energy Time Curve — direct sound, reflections, and ITDG • Channel Balance — L/R level and timing offset • Impedance Analyzer — resonance sweep for Fs, port tuning, and driver behavior • THD+N Analyzer — distortion via frequency sweep, with a per-frequency harmonic profile (H2–H8) • Wow & Flutter Meter — turntable speed stability from a 3150 Hz test record, with peak/RMS deviation and a letter grade • Delay Finder — speaker-to-listener delay and distance • Polarity Checker — correct or reversed speaker wiring • Noise Generator — white, pink, and brown noise for burn-in and acoustics Every measurement tool shows your active input device — your UMIK-1 or the built-in mic. DIAGNOSE System Diagnosis analyzes your RT60, channel balance, distortion, polarity, impedance, and early reflection data, then ranks every issue by severity with plain-English fixes. On Apple Intelligence devices (iOS 26+), on-device AI goes deeper — privately, without sending your data anywhere. DESIGN & SET UP • Room Designer — interactive 2D/3D room visualization with standing-wave heat maps, first reflection analysis, toe-in arcs, and room mode labels. LiDAR room scan on supported devices. • System Builder — document your full signal chain with flow diagrams. Export your component list as forum-friendly Markdown with one tap. • Turntable Setup Suite — tonearm alignment (Baerwald, Löfgren A, Stevenson) with a null-point diagram, tracking-force and anti-skate reference, and a setup checklist. • Ear Trainer — learn to identify frequencies by ear across all 31 ISO 1/3-octave bands, with a scored quiz mode. CALCULATE Eleven acoustic calculators: Room Modes, RT60 (Sabine), SBIR, First Reflection Point, Schroeder Frequency, Crossover, dB Converter, Ohm's Law, Speaker Distance, Cartridge Resonance, and Thiele-Small Parameters. COMMUNITY Share your rooms, systems, and test tracks, browse how others listen, follow fellow listeners, and join the Audiophilio Facebook group. PRICING Free: SPL Meter, Noise Generator, Ear Trainer tones, all calculators, one room, one system, iCloud sync, and community. Premium ($44.99, one-time): everything else — all measurement tools, the vinyl suite, System Diagnosis, unlimited rooms and systems, advanced overlays, LiDAR scan, and export. No ads. No subscriptions. No tracking. Just the tools.