Shizumo is a privacy-first noise meter that measures ambient sound for 10–30 seconds and saves a snapshot so you can review trends over time—without chasing noisy moment-to-moment numbers.

Highlights

• Tap-to-save snapshots: tap → measure 10–30s → saved to history
• Place-based guidelines: recommended dB for common places + adjustable levels
• Custom places (up to 3): add your own places with name, icon, and baseline dB
• Quiet Score: see how often you stay under your guideline
• Readable history: date grouping + mini trend sparkline
• Export: share your history as CSV
• Languages: Korean / Japanese / English

Privacy

• Requires Microphone permission to estimate sound level (dB).
• No raw audio is recorded, stored, or transmitted.
• Only on-device settings and summary results may be stored locally.

Ads

• To keep the app free, a banner ad may be shown.

Note: dB values are estimates and can vary by device/environment.