Wonjin Choi
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App Privacy Policy

A single privacy policy shared by the Android apps developer Wonjin publishes on Google Play. The apps themselves do not collect personal data, but they serve ads through Google AdMob.

01Scope

This policy applies to every Android app developer Wonjin publishes on Google Play that links to this page as its privacy policy.

If a specific app ever processes personal data on its own, that app and the data it handles will be listed explicitly on this page.

02No Personal Data Collected by the Developer

Apps under this policy require no sign-up or login, and the developer does not directly collect, store, or transmit personal data such as your name, email, phone number, location, or contacts.

App settings like orientation rules or theme choices are stored only on your device and are removed when you uninstall the app.

03Advertising (Google AdMob)

The apps use Google AdMob to serve ads. AdMob may collect device identifiers such as the advertising ID for ad delivery, frequency capping, and fraud prevention.

You can change your personalized ads preference at any time in your device settings or the in-app consent dialog. For details on how AdMob handles data, see Google's Privacy Policy (https://policies.google.com/privacy).

04Permissions Stay on Device

Permissions the apps request (for example, modifying system settings or reading your calendar) are used only on-device to provide the corresponding feature.

Information accessed through those permissions is used solely for on-screen display and is never sent to the developer's servers.

05Children's Privacy

The apps are not designed for children, and the developer does not directly collect personal data from any user, including children. Ad-related data handling follows Google's policies.

06Changes and Contact

Any changes to this policy will be announced on this page.

For privacy questions, contact devinsight.contact@gmail.com.

This policy is effective as of August 9, 2026.

October 9, 2026: added app-specific details.

07App-specific details

What each app handles differently. Where anything here differs from the sections above, this section takes precedence.

Scrawl

  • Notes and attachments are stored only on this device and are never transmitted, including for AI classification.
  • AI model files are downloaded from Google's servers; none of your data is uploaded.
  • Pro purchases are handled by Google Play billing, and the app stores only the entitlement on the device. Ads are not shown once you buy Pro.

NightDock Standby

  • If you allow calendar access, event titles and times from your device calendar are read and shown on screen.
  • In photo mode, only the location (URI) and name of the photos you pick are stored on the device.
  • Calendar events, photos and settings are processed on the device only and never transmitted.

How Much Was It?

  • Names, amounts, relationships and trip participants you enter are stored only on this device and never transmitted.
  • The app does not access your contacts.
  • Exported images and CSV files are shared only with the app you choose; handling after that follows that app's policy.

Noise Meter

  • Only loudness is computed in real time from the microphone input; the raw audio is discarded immediately and no recordings are made.
  • Only timestamps, dB values and the microphone calibration value are stored on the device.

Level Tool

  • Accelerometer readings are used for on-screen display only and are never stored or transmitted.
  • Only the zero calibration and vibration/sound settings are stored. No location data is collected.

Stud Finder

  • Magnetic sensor readings are used for on-screen display only and are never stored or transmitted.
  • Only sensitivity and vibration/sound settings are stored. No location data is collected.

Battery Health

  • Battery level, voltage and temperature are used only for display and capacity estimation and are never transmitted.
  • Only the estimated capacity history and the design capacity you enter are stored on the device.

Device Spec

  • Device specifications are read for on-screen display only and are never stored or transmitted.
  • Your phone number, IMSI and IMEI are not collected.
  • A spec card image is created only when you choose to share it.

Bus When

  • Location (optional) is used only to find nearby stops: a position rounded to about 100 m goes to MOLIT TAGO over HTTPS, and only the centre of a roughly 2 km area goes to Seoul bus information. Your location is never stored, tracked or sent to the developer.
  • Arrival lookups send only stop and route IDs.
  • Favourite and recent stops and your selected region stay on the device; stop and route data from public APIs is kept for up to 30 days and can be cleared in Settings.
  • Notification permission is requested only when you turn on an arrival alert, and a foreground service checks arrivals only while that alert is on.

Screen Orientation

  • Shows no ads (does not use Google AdMob). Purchases are handled by Google Play.
  • Overlay, app-usage access (to detect the app in front) and system-settings (screen orientation) permissions are used on the device only for those features.
  • Orientation rules and theme settings stay on the device and are removed when you uninstall.