Shizumo - Build quieter habits

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

Built for everyday places like cafés, libraries, trains, and offices, Shizumo helps you stay mindful with clear, session-based feedback.

### Great for
- Staying mindful in public places (cafés, libraries, trains, offices)
- Keeping simple, session-based records instead of chasing momentary numbers

### Key features
- Tap-to-save snapshots: Tap the circle → measure 10–30s → auto-save 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
- History that’s easy to read: Date grouping + mini trend sparkline
- Manage records: Delete a session with confirmation
- Export when you need it: Share your history as CSV
- Languages: Korean / Japanese / English

### Privacy & permission
- Microphone permission is used only 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 (Android/iOS release builds).
- Ads may be served via the Google Mobile Ads (AdMob) SDK.

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