This update sharpens the interface and fixes a couple of small display issues for a cleaner, more reliable experience. iPhone is unchanged; still fully on-device.

Echorooms 2.0 — a pro upgrade from one RT60 number to a full acoustics workflow, still 100% offline. • Speech Intelligibility: STI, %ALcons, and critical distance, computed from your measured RT60 and noise level. • Noise Rating: the mic listens (no impulse) and reports an NC/NR rating with a spectrum-vs-curve chart and one-knob calibration. • Bonello modal criterion: enter room dimensions for a stricter pass/fail with a one-third-octave density chart. • Air-absorption correction for sharper high-band RT60 in large rooms. • Intelligibility now shows inline on every measurement, and CSV/PNG reports include STI and %ALcons. All acoustics math is computed on-device and oracle-verified. No account, no network — everything stays on your device.

Echoroom 1.2 adds a room mode calculator and data export: - Room mode calculator: enter your room's length, width, and height to see every axial, tangential, and oblique bass resonance up to 300 Hz (or more). Includes a frequency map, clustering warnings, Schroeder frequency, and a Louden dimension-ratio grade so you know how evenly your room distributes its standing waves. - Export measurements as CSV: share all saved readings — including per-band RT60, clarity metrics, and SNR — as a spreadsheet for before/after tracking or further analysis. - 4 new room targets: Home Cinema, Open Office, Gym / Fitness Studio, and Corridor / Lobby. - Glossary expanded from 36 to 50 terms, adding room modes, Louden ratios, mode clustering, pressure zones, STI, Helmholtz resonator, perforated panel, and more. Estimates are a planning guide, not a calibrated lab result. Still 100% on-device with no accounts, ads, tracking, or in-app purchases.

Echoroom 1.1 goes deeper. RT60 per octave band (125 Hz to 4 kHz) plus the broadband summary; clarity and decay metrics (C50, C80, EDT, D50, centre time Ts); room-type targets with a pass/over/under reading; multi-reading averaging with a signal-to-noise quality gauge; a Sabine and Eyring treatment calculator over a bundled 115-material library; 14 room-type targets and a 36-term acoustics glossary, all offline; before/after compare and an exportable report image. Estimates are a planning guide, not a calibrated lab result. Still 100% on-device — no accounts, ads, tracking, or in-app purchases.