Decibel Meter vs Plain｜騒音を検知して環境音を自動再生

How loud is it, really? Decibel Meter measures the noise around you and helps you keep a record you can show to a landlord, property manager or neighbor. MEASURE IN SECONDS • Live dB reading with minimum, average and maximum • A 60-second sound trend • Everyday comparisons: see whether it is like a quiet library, normal conversation or a busy street • Duration and reset, so you can measure any stretch of time RECORD THE EVIDENCE • One-tap recording, saved together with its dB readings • Add a note: where, when and what you heard • Replay, trim and rename recordings • The free version keeps up to 5 recordings REPORTS YOU CAN HAND OVER • PDF noise report with start and end time, levels, a time-stamped chart and the loudest moments • Multi-day summary report that combines several recordings (Pro) • CSV export (Pro) • Preview reports for free; export them without a watermark with Pro SEE THE PATTERN • Daily, weekly and monthly trends • Periods above your threshold are marked (after calibration) AUTO-RECORD (PRO) • Starts recording when noise goes over your threshold while the app is open, and ends each clip after 30 seconds of quiet • Requires calibration with a reference sound level meter ALSO INCLUDED • Hearing exposure estimate based on NIOSH guidelines (calibration required) • 8-band frequency spectrum (Pro) • Recordings stay on your iPhone; no account needed SUBSCRIPTIONS Decibel Meter is free to use: measuring, recording (up to 5 saved recordings), playback, notes, trends and report previews are included. Pro unlocks unlimited recordings, watermark-free PDF reports, multi-day summaries and CSV export, auto-record, the frequency spectrum and an ad-free experience. Payment is charged to your Apple Account at confirmation of purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the current period ends. Manage or cancel anytime in your Apple Account settings. If a free trial is offered, cancel at least 24 hours before it ends to avoid a charge. PRIVACY Your recordings stay on your iPhone; no account needed. The free version shows ads via Google AdMob, and Google Analytics for Firebase and Microsoft Clarity help us understand usage. These services may collect device identifiers and usage data, but never receive your recordings. IMPORTANT Results vary by device and microphone. Readings are estimates unless you calibrate with a reference sound level meter. Auto-record, threshold alarms and exposure estimates require calibration. Decibel Meter is for everyday reference, not a substitute for professional sound level meters, compliance testing or medical advice. Privacy Policy: https://www.decibelmeter.org/appprivacy.html Terms of Use: https://www.decibelmeter.org/appterms.html

Plain は、周囲の音量を検知し、一定以上うるさくなったときだけ環境音を再生するアプリです。 乾燥機音や換気扇音のようなシンプルな音で、気になる生活音をやわらげ、作業や勉強に集中しやすい環境づくりをサポートします。 主な機能 ・騒音を検知して自動再生 ・DRY / VENT の2種類の音を選択可能 ・感度を3段階で調整可能 ・必要なときは手動再生にも対応 ・黒ベースの静かなミニマルUI Plain は必要なときだけ音で環境を整え、集中しやすい空気をつくることを目指しています。