• Added Rattle Finder: mark a candidate frequency during a slow sweep, fine-tune it, replay a steady tone and narrow the search range. • Keep the last spectrum after stopping capture, and save snapshots with capture time and measurement conditions. • Compare saved spectra with A/B overlays, per-band differences and optional overall-level normalization. • Organize spectra, listening findings and guided checks into device or room projects, with notes and CSV export. • Improved capture restart, saved-record editing, long filenames and microphone cleanup when closing analysis. • Refined English, Chinese and larger-text layouts.

• Refined tone, sweep, and noise output, including cleaner high-frequency triangle waves and more stable playback. • Added calibration quality checks to reduce the impact of noise, clipping, and incomplete measurements. • Improved guided tests so progress follows actual playback and interrupted steps can be restarted. • Made presets, test history, and calibration data more reliable to save and recover. • Improved spectrum analysis and audio session coordination, with better resource handling after playback stops. • Improved purchase and restore status messages, large text, and accessibility.

• Frequency output now adapts to the device sample rate to prevent aliasing outside the safe playback range. • Reworked the real-time rendering and calibration path for lower callback overhead and more stable sweep, noise, and compensation behavior. • Upgraded the RTA with Hann-windowed vDSP band-power analysis for more accurate third-octave and low-frequency results. • Improved interruption, route-change, and media-services recovery to reduce the risk of unintended speaker output. • Improved digital headroom, settings persistence, VoiceOver, and Reduce Motion support.

• Added guided acoustic test flows and test history for reference tone, sweep, noise, channel, and low-frequency checks. • Sweep playback now supports single, fixed-count, and continuous loops with direction and interval controls. • Share bilingual test result cards, and import or export custom presets. • Share calibration reports as PDF, CSV, or response-curve PNG files.

Improved test presets, calibration report export, real-time spectrum analysis, and Settings organization.

Added a one-click test preset pack with built-in acoustic check scenarios, including 1 kHz reference tone, full-range sweep, pink noise, white noise, left/right channel checks, and low-frequency response check. Added calibration report export, allowing the active calibration profile’s test points, correction values, route details, and summary to be exported as a local text report for records or support handoff. Improved the preset workflow so common tests can be loaded instantly while keeping user-created presets separate and fully manageable.

Optimize product UI interaction, remove disruptive ad elements and enhance overall user experience.

Added full access with a 7-day trial. Users can unlock all core features and remove all ads with a one-time App Store purchase. Added ad support users who have not unlocked full access may see a startup ad and a Settings banner during the trial and can optionally watch a rewarded ad for temporary access after the trial expires. Updated privacy disclosures the App Tracking Transparency prompt support pages and privacy policy links to match the current ads and in-app purchase behavior. Continued refinements to acoustic testing screens preset management and route status display.

Optimize the UI