Privacy Policy

CloudEx Inc. ("we", "us", or "our") operates the "Handwriting Notes Pro" app (the "Service"). This Privacy Policy explains what information we collect, how we use it, and the choices available to you. By using the Service, you are deemed to have agreed to the practices described in this Policy.

1. Our Core Principle

Handwriting Notes Pro is an Android app that brings together handwritten notebooks you write in with a pen or your finger and a whiteboard you can write on and wipe clean in an instant. You can also write on PDFs, insert pictures, and type text. Your notes are yours: they are stored on your device, there is no account and no sign-in, and we do not run any server that receives them. Specifically, we do not have access to any of the following:

  • Your notebooks and what is in them: handwriting, typed text, the pictures you insert, and the PDFs you import
  • The whiteboard
  • Your settings

Your notes leave your device only through actions you take yourself — exporting, sharing, or backing up to a place you choose (Section 2) — or through Android's own backup, if you have it turned on (Section 3.2).

2. Your Notes, Pictures, and PDFs

  • Where your notes are kept: Notebooks, handwriting, typed text, inserted pictures, imported PDFs, the whiteboard, and your settings are stored in the app's own storage on your device.
  • Pictures: You pick each picture yourself in Android's photo picker, one at a time. The app does not ask for permission to read your photos or your storage. A picture you pick is resized to 2048 pixels on its long side, its orientation is applied, and it is saved in the app's own storage. The location where the photo was taken and other embedded details are not kept.
  • PDFs: A PDF you choose yourself in Android's file picker is copied into the app's own storage so that you can write on it.
  • Exporting and sharing: You can save or share a notebook as a PDF, and a page as an image. Files are saved only to the place you choose in the save screen, or to your gallery (Pictures/HandwritingNotes, Android 10 and later). Images in the gallery can be seen by other apps that you have allowed to access your photos. When you share, the file goes only to the app you choose.
  • Backups: You can export a backup as a ZIP file, and you can turn on automatic backups to a folder. Both are written only to the place you choose.
  • App lock and locked notebooks: These use Android's biometric prompt with your device's screen lock (fingerprint, face, PIN, and so on). Biometric data is handled by Android and never reaches the app.
  • Hide content in recent apps: With this setting on, your notes are not shown in the thumbnails of the recent apps screen.

3. Information We Collect

3.1 Information Collected Automatically

  • Anonymous crash reports: Via Firebase Crashlytics. When the app crashes, we collect the stack trace, device model, OS version, and app version. This does not include personally identifiable information or the contents of your notes.
  • Purchase information: We use purchase tokens issued by Google Play to verify your one-time "Premium" purchase. We never receive any payment information such as credit card numbers.
  • List of our other apps: To show our other apps in Settings, the app downloads their names, descriptions, and icons from our content server (static files hosted on Cloudflare Pages). The request contains no personal data from the app. As with any request to a web server, the server receives your device's IP address as part of the connection. Tapping an app in the list opens its page on Google Play.

3.2 Information Stored Only on Your Device

  • Your notes: Stored on your device as described in Section 2. They never leave it unless you export, share, or back them up yourself, or Android's backup includes them (below).
  • Trash: Notebooks you delete stay in the trash on your device for 30 days, and are then removed.
  • App settings: Your pens, colors, paper, and other settings are stored on your device.
  • Android backup: If backup is turned on in your device settings, Android may include your notebooks and the app's settings in the backup it saves to your own Google account, and may copy them to a new phone when you transfer your data directly. Records specific to one device (such as whether a pen has been used on it) are not included. This is handled by Android; we have no access to it.
  • When you uninstall: Uninstalling the app or clearing its data deletes all the notes stored in the app's own storage. Files you exported to the gallery or to a place you chose remain until you delete them.

3.3 Information We Explicitly Do Not Collect

  • The contents of your notes (handwriting, typed text, pictures, and PDFs)
  • Your name, email address, phone number, or contacts (the app has no account or sign-in)
  • Your location
  • Other files on your device, or the contents of other apps
  • Your device's advertising ID

3.4 Permissions the App Requests and Their Purposes

Handwriting Notes Pro requests only the following permissions and uses them only for the stated purposes:

  • Internet and network state (INTERNET / ACCESS_NETWORK_STATE) — Used only to download the list of our other apps, open this privacy policy, check purchases and updates with Google Play, and send anonymous crash reports. Writing notes and using the whiteboard do not require an internet connection.
  • Google Play billing (com.android.vending.BILLING) — Used to purchase Premium.
  • Biometrics (USE_BIOMETRIC / USE_FINGERPRINT) — Used to show Android's biometric prompt for the app lock and locked notebooks.

The app does not request permission to access your photos, files, camera, microphone, location, contacts, or notifications. Pictures and PDFs are chosen one at a time in Android's own pickers.

4. How We Use Information

The limited information we collect is used only for the following purposes:

  • Operating and maintaining the Service
  • Verifying your Premium purchase
  • Diagnosing and fixing crashes
  • Responding to support inquiries
  • Complying with applicable laws

5. Third-Party Services

Handwriting Notes Pro uses the following third-party services. Each service has its own privacy policy.

  • Firebase Crashlytics (Google LLC) — anonymous crash diagnostic data
  • Google Play Billing (Google LLC) — the one-time Premium purchase; payment is completed on Google Play, and we receive only a purchase token
  • Google Play In-App Review and In-App Updates (Google LLC) — let you rate the app and install updates without leaving it; handled by Google Play
  • Cloudflare Pages (Cloudflare, Inc.) — hosts the static list of our other apps

Handwriting Notes Pro does not use Google Analytics for Firebase, and does not use your device's advertising ID.

6. Data Retention

  • Crash reports: retained for 90 days, then deleted.
  • Support emails: retained for 12 months after the last reply, then deleted (except where legally required).
  • Your notes and settings on your device: kept until you delete them, uninstall the app, or clear the app's data. Deleted notebooks stay in the trash for 30 days and are then removed automatically.

7. International Data Transfers

We are based in Japan. The infrastructure used for crash diagnostics and for hosting the list of our other apps may be located in various countries. When you use the Service, the minimal information described above may be processed outside your country of residence under standard contractual safeguards.

8. Your Rights

Depending on where you reside (e.g., the EEA, UK, California, Japan), you may have the right to request access to, correction of, or deletion of the limited information we hold. You can:

  • Delete notebooks in the app at any time, or uninstall the app or clear its data to erase the notes stored on your device
  • Turn off backup in your device settings if you do not want Android to include the app's data in your Google account backup
  • Contact us at the address below to make a request regarding the information we hold

9. Children's Privacy

We do not knowingly collect personal information from children under the age of 13 (or the minimum age applicable in your region). The app has no account and does not ask anyone for their name or contact details. The whiteboard's "Hand it to a child" option hides the menus so that only the board can be used (Android may ask to pin the screen); it collects no information. If we learn that we have inadvertently collected information from such a child, we will delete it promptly upon being contacted.

10. Changes to This Policy

This Privacy Policy may be updated from time to time. The latest version is always published at this URL together with its effective date. We will also notify you within the app of significant changes as appropriate.

11. Contact

For questions about privacy, data requests, or to report concerns, please email us at .

CloudEx Inc. (Japan)

Effective Date: October 20, 2026