Shizumo
10–30s, tap-to-save
noise snapshots
Shizumo is a privacy-first noise meter that measures for 10–30 seconds, saves a snapshot, and shows place-based guidelines with a simple Quiet Score.
10–30s snapshotsPlace guidelinesQuiet ScoreNo raw audio stored
Shizumo
English • preview
Stop chasing momentary numbers
Problem
In cafés, libraries, and trains, it’s easy to overreact to fluctuating dB readings.
Solution
Save short sessions and review trends with clear guidelines and Quiet Score.
Key features
Tap-to-save snapshots
Tap → measure 10–30s → auto-saved to history
Place-based guidelines
Recommended dB for common places + adjustable levels
Custom places (up to 3)
Add your own place name, icon, and baseline dB
Quiet Score
A simple summary of how often you stayed under the guideline
Readable history
Date grouping + mini trend sparkline + session management
CSV export
Share your history when you need it
Languages & theme
Korean / Japanese / English + light/dark/system theme
Privacy-first
Mic permission for dB estimation only. No raw audio recorded/stored/sent.
Screenshots
STEP 1
1) Tap
Tap the circle on Home.
STEP 2
2) Measure 10–30s
A short session runs and is saved automatically.
STEP 3
3) Review
Check snapshots, trends, and Quiet Score in History.
FAQ
Is it free? Are there ads?
To keep the app free, a banner ad may be shown in Android/iOS release builds.
Why do you need microphone permission?
It is used only to estimate ambient sound level (dB).
Do you record or upload audio?
No. Raw audio is not recorded, stored, or transmitted. Only on-device settings and summary results may be stored locally.
Are dB values accurate?
dB values are estimates and can vary by device/environment. Shizumo focuses on trends and habits.
Build quieter habits today
10–30 second snapshots with clear guidance.