DownloadBot — Privacy Policy

Last updated: 3 September 2026

DownloadBot ("the app") is an internal tool that automatically backs up files shared in a LINE group chat to a Google Drive folder, so that they are not lost when they scroll out of the chat history. This policy explains what the app accesses and why.

Who operates the app

The app is operated privately by MERCIL for internal use. It is not offered to the public and is not available for general sign-up.

What the app accesses

• Files posted in the LINE group it has been added to — documents, images, videos, and voice messages. Text messages are ignored and are never downloaded or stored.
• Message and group identifiers supplied by the LINE platform, used to name files and to record which conversation a file came from in the application log.
• Google Drive, via the https://www.googleapis.com/auth/drive scope, in order to create files in the specific folder the operator has configured.

How Google user data is used

Google Drive access is used for exactly one purpose: uploading a copy of each file posted in the LINE group into the Drive folder chosen by the account holder who authorized the app.

The app does not read, modify, organize, delete, or share any other file in that Google account. It does not browse Drive contents. It does not transfer Google user data to any third party, and it is not used for advertising, profiling, credit assessment, or training machine learning or AI models.

What is stored, and where

• Uploaded files are stored in the Google Drive folder designated by the account holder. They remain under that account holder's control and are subject to Google's own terms and privacy policy.
• No file content is stored by the app. Data passes through the app's memory from LINE directly to Google Drive and is never written to disk.
• An OAuth token is stored on the operator's own server so the app can continue uploading without prompting for sign-in each time. It is stored with owner-only file permissions and is never transmitted anywhere except to Google.
• Application logs record file names, sizes, message identifiers, and group identifiers for troubleshooting. Logs contain no file contents.

Sharing

No data collected by the app is sold, rented, or shared with any third party. The only external services involved are the LINE Messaging API, which the files originate from, and the Google Drive API, which they are delivered to.

Withdrawing access

The Google account holder can revoke the app's access at any time at myaccount.google.com/permissions. Revoking access stops all further uploads immediately. Files already uploaded remain in that account holder's Drive and are theirs to keep or delete.

Removing the bot from the LINE group also stops all collection, since the app only ever receives messages from groups it is a member of.

Retention

Uploaded files are retained in Google Drive until the account holder deletes them. The app itself retains no copies. Application logs are retained only as long as needed for troubleshooting.

Children

The app is an internal business tool and is not directed at children.

Changes to this policy

If this policy changes, the revised version will be published at this same address with an updated date above.

Contact

Questions about this policy or about data the app has handled can be sent to all@mercil.co.th.