Privacy should be as plain as your files.

01 · OverviewLocal-first by design

Kihya Memo is a local-first note app that does not require registration or mandatory login. Note text, file names, folder paths, attachments, and search terms are stored on the user’s device by default and are not transmitted to Kihya servers.

This policy is separate from Kihya’s commerce privacy policy. When you choose to open an external website in your system browser, that site’s privacy and cookie policies apply there.

02 · DataInformation the app handles

• Original notes and files: UTF‑8 TXT or Markdown content, file and folder names, paths, photos, PDFs, archives, and other files you choose to store. These remain in app‑managed local storage or an external file you explicitly select.
• Local auxiliary data: pre-save versions and a recent crash-recovery draft. These stay in app-private local storage, are hidden from the system file browser, and are excluded from Drive sync, cloud backup, device migration, and full ZIP export.
• Recently Deleted: deleted notes and folders first move to a hidden recoverable area. You may optionally protect this screen using Face ID, Touch ID, device passcode, Android biometrics, or system lock. The app receives only the operating system’s success or failure result and does not read or store biometric data or your passcode.
• Optional Google account data: if you connect Google Drive, the app uses an OAuth access token and displays the connected account email inside the app. The email is used only to show connection status and is not included in Analytics events.
• Product analytics: Firebase Analytics may process a random app‑instance ID, device and operating‑system information, app version, approximate region, sessions, screens, app lifecycle, and feature‑use events. Note content, file or folder names and paths, searches, attachments, and Google account information are never included.

03 · PurposeWhy data is used

• To create, read, edit, rename, move, search, preview, export, and recover the files you choose.
• To provide local versions, crash recovery, and recoverable deletion.
• When requested, to sync original files, merge changes, create conflict copies, and mirror recoverable deletion through the user’s own Google Drive.
• To understand aggregate app stability and feature usage so we can improve the product without reading what users write.

04 · GoogleGoogle user data and limited access

Google OAuth and the Drive API are used only when a user explicitly selects Connect Google Drive in Settings. Before continuing, the app explains the expected Google permission screen and tells users to cancel if the app name is unfamiliar or an unverified‑app warning appears.

• drive.file: creates, views, and modifies files that Kihya Memo created or that the user connected to this app, and moves an app-deleted Drive item to Google Drive trash. It does not allow the app to read or manage the user’s entire Drive.
• drive.appdata: stores only a small identifier that helps multiple devices locate the same visible “Kihya Memo” folder. Note text and attachments are not stored in this hidden app-data area.

Google user data is processed solely to provide user‑requested file sync, change merging, conflict‑copy creation, and recoverable deletion. It is not sold or used for advertising, credit evaluation, profiling, or unrelated analytics, and is not disclosed to third parties except when legally required or explicitly requested by the user. Kihya personnel do not inspect note contents for ordinary operations.

05 · RetentionStorage, deletion, and recovery

• Local originals: remain until you delete them, clear app data, or uninstall the app, subject to the operating system’s storage behavior. External files you selected may remain outside the app.
• Versions and recovery drafts: remain in app-private local storage according to app settings and use. Saving normally or discarding changes removes the related crash draft. “Delete all version history” removes versions, not current notes or crash drafts.
• Recently Deleted: remains recoverable until you explicitly restore or permanently delete items. Version history and the hidden deleted area are excluded from cloud backup, device migration, and ZIP export.
• Google Drive: disconnecting Drive or uninstalling the app does not automatically delete original files already on the device or in Drive. You may delete the visible “Kihya Memo” folder and app configuration data yourself. Items deleted in the app move to Google Drive trash when sync is connected.
• Analytics: transmitted data is encrypted in transit and follows the retention and deletion settings of the Firebase/Google Analytics project. Clearing app data may reset the device’s app‑instance ID, but previously aggregated statistics may not be deleted immediately.

06 · SharingService providers and disclosures

Kihya does not sell personal information or Google user data. Google services process data only as needed to provide optional OAuth, Drive synchronization, and Firebase Analytics under their applicable terms and safeguards. Information may also be disclosed when required by law, necessary to protect a person’s urgent safety or rights, or explicitly directed by the user.

External websites open only after the user chooses a link. Their cookies, accounts, age verification, orders, and payments are handled by the browser and that website; Kihya Memo does not receive those results.

07 · ChoiceYour controls and rights

• Use all core note features without connecting Google Drive.
• Disconnect Drive at any time in Settings or revoke access from Google Account third-party connections.
• Open, share, move, or export your original TXT, Markdown, and related files.
• Restore or permanently delete items from Recently Deleted.
• Request access, correction, deletion, restriction, or other applicable privacy rights by contacting us. We may need limited information to verify and fulfill the request.

08 · SecuritySafeguards and practical limits

We apply reasonable technical and organizational safeguards appropriate to the app, including operating‑system protected storage, encrypted network transport, minimum Drive scopes, and data‑minimized analytics events. No storage or transmission method can guarantee absolute security, and device security remains important for locally stored files.

When seeking support, do not send note contents, file or folder names and paths, searches, attachments, Google account information, passwords, or authentication codes. This site contains no form that asks you to upload such data.

09 · LinksCreator support and age notice

The optional creator‑support item opens Kihya’s separate physical‑beverage store in the system browser only after an adult confirms they are at least 19 years old. The app does not browse products, process orders or payments, or receive purchase results. A purchase does not unlock app functions. This self‑confirmation does not replace any legally required age or identity verification on the external site.

10 · ContactQuestions, rights, and policy changes

For product support or privacy requests, email help@kihya.com. Kihya Co., Ltd. operates Kihya Memo. Material changes will be posted on this page before they take effect when reasonably practicable, with the updated date shown below.