PRIVACY POLICY

Application: QR Scanner (Quét Mã QR)
Effective Date: August 1, 2026

1. About This Privacy Policy

We respects your privacy and is committed to protecting information processed through the QR Scanner mobile application

This Privacy Policy explains how QR Scanner accesses, processes, stores, uses, protects, and, where applicable, shares information when you use the Application.

QR Scanner is a utility application that allows users to scan QR codes and barcodes, scan codes from selected images, generate codes, maintain an optional scan history, save associated images, import or export backups, and share content at the user’s direction.

By downloading, installing, or using QR Scanner, you acknowledge that you have read and understood this Privacy Policy.

2. Information We Process

2.1 Scanned Content

QR Scanner may process information contained in QR codes or barcodes that you choose to scan, including:

• Plain text.

• Website addresses.

• Email addresses and prepared email content.

• Telephone numbers.

• Prepared text messages.

• Wi-Fi network information.

• Contact information.

• Geographic coordinates.

• Calendar event information.

• Product identifiers.

• Other content encoded in a supported QR code or barcode.

The exact information processed depends entirely on the code selected or scanned by you.

Scanned content is processed locally on your device.

S2 Developer does not operate a proprietary server that automatically receives or stores scanned content.

2.2 Camera Images

When you use live camera scanning, QR Scanner processes camera frames to identify QR codes and supported barcodes.

The Application may also save an optional image associated with a successful scan for later reference in scan history.

Camera frames are processed locally on your device and are not automatically uploaded to S2 Developer.

2.3 Images Selected by You

When you choose to scan a code from an existing image, QR Scanner accesses only the image you select through the Android system file or image picker.

The Application does not request general access to your entire photo library.

The selected image is processed locally to identify supported codes.

2.4 Scan History and Application Settings

QR Scanner may store the following information locally:

• Scanned content.

• Code format.

• Detected content type.

• Date and time of the scan.

• Source of the scan.

• An optional image associated with the scan.

• Language preference.

• Theme preference.

• Sound preference.

• Vibration preference.

• Automatic copy preference.

• Automatic website opening preference.

• Other Application settings.

2.5 Content Used to Generate Codes

QR Scanner may process information that you voluntarily enter to generate a QR code or barcode, including:

• Text.

• Website addresses.

• Wi-Fi network information.

• Contact information.

• Email information.

• Telephone numbers.

• Message content.

• Geographic coordinates.

• Event information.

• Other supported content.

Generated content is processed locally on your device.

2.6 Technical Information Included in Feedback

If you choose to contact S2 Developer through the feedback feature, QR Scanner may prepare an email containing limited technical information, including:

• Application version.

• Device manufacturer.

• Device model.

• Android version.

• Feedback entered by you.

The email is opened in an external email application and is sent only after you review and submit it.

You may edit or remove any prepared information before sending the email.

3. How Information Is Used

QR Scanner processes information only for purposes reasonably necessary to provide and maintain Application functionality, including:

• Scanning QR codes and supported barcodes.

• Displaying scan results.

• Identifying the type of scanned content.

• Maintaining local scan history.

• Saving an optional image associated with a scan.

• Generating QR codes and barcodes.

• Importing or exporting scan history.

• Saving generated code images.

• Sharing text or images at your direction.

• Copying content to the device clipboard.

• Opening supported content in an external application.

• Remembering language, theme, sound, vibration, and automation preferences.

• Responding to feedback or support requests.

• Diagnosing technical problems.

• Maintaining Application security, reliability, and compatibility.

QR Scanner does not use your information to:

• Display third-party advertising.

• Personalize advertising.

• Track you across unrelated applications or websites.

• Create advertising or marketing profiles.

• Determine creditworthiness.

• Sell or rent personal information.

• Train artificial intelligence models operated by S2 Developer.

4. Local Storage and On-Device Processing

QR code and barcode recognition is performed locally on your device using an on-device code-processing library.

Camera frames, selected images, scan content, and generated code content are not automatically sent to S2 Developer or to an online recognition service.

Locally stored information may include:

• Scan history.

• Scanned content.

• Code type.

• Scan date and time.

• Optional images associated with scans.

• Application preferences.

• Temporary files created for sharing.

• Local recovery files used to protect scan history against interrupted storage operations.

S2 Developer cannot remotely access information that remains solely within QR Scanner’s private storage area.

QR Scanner disables the standard Android automatic backup mechanism for its private Application data.

This restriction does not apply to files that you voluntarily export, save, or share outside the Application’s private storage area.

The security of locally stored information also depends on the security of your device. You are responsible for protecting your device against unauthorized access.

5. Permissions and Device Access

QR Scanner may use the following permissions and device features:

Camera

Camera access is used to:

• Display a live camera preview.

• Detect QR codes and barcodes.

• Capture an optional image associated with a successful scan.

Camera access is optional.

If camera permission is denied or revoked, live camera scanning will not function. Other features that do not require the camera may remain available.

Vibration

Vibration access is used to provide optional feedback after a successful scan.

This permission does not provide access to personal content.

System File and Image Pickers

QR Scanner uses Android system interfaces to allow you to:

• Select an image for scanning.

• Select a backup file for import.

• Select a location for an exported backup.

• Select a location for a generated image.

The Application receives access only to the specific content or location selected by you.

QR Scanner does not request access to:

• Device location.

• Microphone.

• Contacts.

• Call logs.

• SMS messages.

• Full photo library.

• Advertising identifiers.

QR Scanner does not request Internet permission.

6. Third-Party Services

6.1 On-Device Barcode Processing

QR Scanner uses the ZXing open-source library to recognize and generate QR codes and barcodes.

Recognition and generation are performed locally on the device.

The library is not used to upload camera frames, selected images, scanned content, or generated content to an online recognition service.

6.2 External Applications

At your direction, QR Scanner may open or transfer content to an external application, including:

• Web browser.

• Email application.

• Telephone application.

• Messaging application.

• Map application.

• File manager.

• Image viewer.

• Sharing application.

• Other compatible applications installed on your device.

These applications operate independently and process information according to their own privacy policies and terms.

6.3 External Email Applications

When you choose to send feedback, QR Scanner opens an external email application.

The email provider you select may process:

• Your email address.

• The recipient address.

• Message content.

• Technical information included in the message.

• Other information processed by the email provider.

The email provider operates independently under its own privacy policy.

6.4 Google Play and Android Services

QR Scanner may rely on Google Play and Android system components to provide installation, updates, permissions, camera access, file selection, content sharing, security, and operating-system functionality.

These services operate independently under their respective terms and privacy practices.

7. Data Sharing and Disclosure

S2 Developer does not:

• Sell personal information.

• Rent personal information.

• Share personal information with advertising networks.

• Use advertising identifiers.

• Upload scan history to a S2 Developer server.

• Upload camera frames or selected images to S2 Developer.

• Use scanned content for marketing.

• Share scanned content with data brokers.

• Use information for behavioral advertising.

• Operate a proprietary analytics service that receives your private QR Scanner content.

Information may be transferred outside QR Scanner only in the following circumstances:

At Your Direction

Information may be transferred when you intentionally:

• Share scanned text.

• Share a generated image.

• Save a generated image.

• Export a backup.

• Import a backup.

• Open scanned content in another application.

• Copy content to the clipboard.

• Send a feedback email.

• Open an external webpage.

If you enable automatic copying or automatic website opening, QR Scanner may perform the selected action after a successful scan according to your saved preference.

To Provide a Requested Service

An external application may receive information when necessary to perform an action selected by you.

Legal and Safety Requirements

S2 Developer may disclose information available to us where reasonably necessary to:

• Comply with applicable law.

• Respond to a valid legal process.

• Protect the rights, property, or safety of users, S2 Developer, or others.

• Investigate fraud, misuse, or security incidents.

• Establish, exercise, or defend legal claims.

Because QR Scanner content is stored locally, S2 Developer generally does not possess scanned content, scan history, or associated images.

8. Data Retention and Deletion

8.1 Data Stored on Your Device

Locally stored information remains on your device until:

• You delete an individual history item.

• You clear all scan history.

• You replace information through an import.

• You clear QR Scanner’s data through Android settings.

• You uninstall QR Scanner.

Clearing Application data or uninstalling the Application removes information stored within QR Scanner’s private storage area.

8.2 Exported Files

Files exported or saved by you may include:

• Scan-history backup archives.

• Images associated with scans.

• Generated QR code images.

• Generated barcode images.

• Other user-selected exported content.

Exported files are stored outside the Application’s private storage area at a location selected by you.

Clearing Application data or uninstalling QR Scanner may not delete exported files.

You are responsible for managing, protecting, and deleting these files.

8.3 Imported Files

When you import a compatible backup, QR Scanner reads the backup selected by you and may restore scan history and associated images into the Application’s private storage.

The original backup file remains at its existing location unless you delete it separately.

8.4 Temporary Sharing Files

QR Scanner may create a temporary image in its cache when you share a generated code.

The file is provided to the application selected by you through Android’s secure file-sharing mechanism.

Temporary cache files may be removed automatically during later Application use or by the Android operating system.

8.5 Support Communications

Feedback and support emails may be retained for as long as reasonably necessary to:

• Respond to your request.

• Investigate or resolve a technical issue.

• Maintain an appropriate support history.

• Protect legal rights.

• Comply with applicable legal obligations.

You may request deletion of a support communication by contacting S2 Developer.

We will evaluate and process the request where reasonably possible and legally permitted.

9. Data Security

S2 Developer applies reasonable technical and organizational measures appropriate to the nature of QR Scanner, including:

• Processing codes locally on the device.

• Storing scan history and associated images in the Application’s private storage area.

• Limiting permissions to those necessary for Application functionality.

• Using Android system pickers for user-selected files and images.

• Using Android’s secure content-sharing mechanism for temporary shared files.

• Requiring user action before exporting, saving, sharing, or opening content.

• Not automatically transmitting scanned content to S2 Developer.

• Not requesting Internet permission.

• Disabling cleartext network traffic.

• Disabling standard Android automatic backup for private Application data.

No method of electronic storage or transmission is completely secure.

We cannot guarantee absolute security against every possible threat.

You should protect your device, exported files, backup archives, scanned information, and external accounts against unauthorized access.

10. User Choices and Controls

You may:

• Grant, deny, or revoke camera permission.

• Enable or disable vibration.

• Enable or disable sound.

• Enable or disable automatic copying.

• Enable or disable automatic website opening.

• Select the specific image used for image-based scanning.

• Delete individual scan-history items.

• Clear all scan history.

• Import or export a backup.

• Select where exported files are stored.

• Choose whether to share scanned or generated content.

• Choose which external application receives content.

• Clear Application data through Android settings.

• Uninstall the Application.

• Edit or cancel a feedback email before sending it.

• Contact S2 Developer regarding privacy questions or support communications.

Because S2 Developer does not operate a server containing your scan history, scanned content, or associated images, we generally cannot remotely view or delete information stored solely on your device.

11. Children’s Privacy

QR Scanner is a general-purpose utility and is not designed to intentionally collect personal information from children.

QR Scanner does not ask users to provide their age and does not use Application information to profile children or deliver behavioral advertising.

Parents and legal guardians should supervise a child’s use of the device camera, scanning features, clipboard, exported files, and external sharing features where appropriate.

If we learn that a child has submitted personal information directly to S2 Developer through a support communication without appropriate authorization, we will take reasonable steps to delete that information where legally required and technically possible.

12. Changes to This Privacy Policy

We may update this Privacy Policy when:

• QR Scanner adds, removes, or changes a feature.

• The categories of information processed change.

• Application permissions change.

• A third-party component changes.

• Data retention or security practices change.

• Google Play requirements change.

• Applicable laws or regulations change.

• Additional clarification is necessary.

The revised Privacy Policy will display an updated “Last Updated” date.

Material changes may also be communicated through an Application update, an in-Application notice, the Google Play listing, or another appropriate method.

13. Contact Us

Questions, privacy requests, feedback, or complaints relating to QR Scanner may be directed to:

Developer: S2 Developer
Privacy and Support Email: trogupnhanh@gmail.com

Please include sufficient information for us to understand and respond to your request.