昭和レトロ電卓 vs サウンドチェッカー

昭和家電のような「蛍光表示管（VFD）」風の光り方と、カチカチ音で“触って気持ちいい”電卓です。 【主な機能】 四則演算・小数・％・符号反転 紙テープ履歴（端末内のみ保存） クリック音／ボタン振動のON/OFF ※広告（AdMob）を表示します。データは原則端末内で完結します。

What's the noise level around you? Sound Checker measures ambient noise levels in real-time using your phone's microphone. - Check apartment noise from neighbors - Measure snoring or teeth grinding volume - Monitor noise at construction sites or events - Check sound levels in your baby's room - Measure quietness of cafes and offices Features: - Real-time dB measurement with large meter display - 30-second waveform graph - Measurement history (min/avg/max dB auto-saved) - WHO noise level guidelines & Japan environmental standards Your microphone is used only for measurement. No audio data is stored or transmitted. Completely free with all features available. Note: This app provides approximate noise level readings using your smartphone's microphone. For legal evidence or precise measurements, please use a professional sound level meter.