Ever wondered why you can’t focus at certain times of day, or whether your apartment is actually as loud as it feels? Most of us have a vague sense that noise affects us, but no real data to back it up. Noise Recorder gives you that data.
I built this because I wanted a simple, honest picture of my own sound environment — not a professional acoustic tool, not something that uploads recordings to a server, just a personal log I could review on my own terms. The app is called 소음 모니터링 in Korean, which roughly translates to “noise monitoring,” and that’s exactly what it does: quiet, continuous observation, no account required.
What It Does
- Real-time decibel measurement. The app reads your microphone continuously and displays live dB values alongside a waveform. Noise levels are color-coded into three tiers — quiet, everyday, and loud — so you can read the room at a glance.
- Segmented auto-recording. Recordings are automatically split into fixed time chunks. Segments that contain nothing but near-silence are discarded automatically, so your storage doesn’t fill up with empty audio.
- Noise spike detection. When sound suddenly jumps above the ambient baseline, the app flags it as an event and saves five seconds of audio on either side, so you can go back and hear exactly what caused the spike.
- Tags, notes, and photos. You can label recordings with seven built-in tags — footsteps, thudding, construction, water, music or TV, pets, and other — or create your own. Reference photos can be attached to any entry.
- Hourly statistics and data export. A 24-hour graph shows which parts of the day tend to be noisy versus quiet. When you need a summary, measurement data can be exported as PDF, Excel, or ZIP, with filters for minimum dB threshold and tag exclusions.
One thing worth being clear about: this is a personal observation tool, not a legal evidence recorder. It won’t tell you who is making noise or why, and it isn’t designed to produce documents for formal complaints or disputes. The measurements and recordings are for your own reference, to help you understand your environment better.
Everything stays on your device. Recordings, photos, and statistics are stored locally using on-device storage and never sent to an external server. The only outbound data flow is through Google AdMob for ads, which respects iOS App Tracking Transparency — you’ll see non-personalized ads if you decline tracking. Microphone access is needed for measurement and recording; camera and photo library access is only requested if you choose to attach a reference photo.
Who It’s For
If you work from home and suspect certain hours are consistently disruptive, live in an apartment building where noise travels unpredictably, or simply want an honest record of what your space sounds like over time, Noise Recorder is built for that kind of quiet personal investigation. It supports both Korean and English, with the language switchable instantly from settings without restarting the app — so it’s equally accessible whether you’re in Seoul or anywhere else.
Version 1.0 is available now on the App Store. If you give it a try and have feedback or suggestions, I’d genuinely love to hear from you at siwooeo@gmail.com.
App Store에서 다운로드: Noise Recorder – 소음 모니터링
Official page: reactiveworks.dev/apps/6765866874
Update history: ahngo13.github.io
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