什么是 db Meter？
Most decibel meter apps bury the one number you actually want under a cluttered dashboard of widgets, ads, and settings. dB Meter strips it back to the essentials: point your phone at anything loud and read the dB level instantly on a clean analog gauge with a live waveform underneath. Pro tier adds real tools when you need them — RTA spectrum analyzer, peak hold, full measurement history, and export to PDF/CSV/image
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