LevelCheck is your acoustic advisor for iPhone and iPad — not just another decibel meter. It helps DJs, producers, podcasters, and venue operators run guided setup checks and get plain-English recommendations on what to fix, without pro-audio jargon or a cloud account. The app combines 25 guided room and booth checks (11 on Core Annual, 14 on Pro Annual) with Fix-Verify workflows and side-by-side comparisons. Live loudness metering, 7-band spectrum, and NIOSH/OSHA noise-dose tracking are included for credibility. On iPhone, the App Clip at levelcheck.live/clip offers a lightweight meter preview. Measurement data stays on-device; no audio is recorded or transmitted. Designed for practical setup guidance — not formal compliance or laboratory calibration.