Privacy Policy for Lumen

Last updated: May 30, 2026

Privacy Policy

This Privacy Policy describes Our policies and procedures on the collection, use and disclosure of Your information when You use the Service and tells You about Your privacy rights and how the law protects You.

We use Your Personal Data to provide and improve the Service. By using the Service, You agree to the collection and use of information in accordance with this Privacy Policy.

Interpretation and Definitions

Interpretation

The words whose initial letters are capitalized have meanings defined under the following conditions. The following definitions shall have the same meaning regardless of whether they appear in singular or in plural.

Definitions

For the purposes of this Privacy Policy:

• Account means a unique account created for You to access our Service or parts of our Service.
• Affiliate means an entity that controls, is controlled by, or is under common control with a party.
• Application refers to Lumen, the software program provided by the Company.
• Company (referred to as either "the Company", "We", "Us" or "Our" in this Privacy Policy) refers to Lumen.
• Country refers to: China.
• Device means any device that can access the Service such as a computer, a cell phone or a digital tablet.
• Personal Data (or "Personal Information") is any information that relates to an identified or identifiable individual.
• Service refers to the Application.
• Service Provider means any natural or legal person who processes the data on behalf of the Company.
• Usage Data refers to data collected automatically, either generated by the use of the Service or from the Service infrastructure itself.
• You means the individual accessing or using the Service.

Collecting and Using Your Personal Data

Types of Data Collected

Personal Data

While using Our Service, We may ask You to provide Us with certain personally identifiable information that can be used to contact or identify You.

Personally identifiable information may include, but is not limited to:

• Usage Data

Usage Data

Usage Data is collected automatically when using the Service.

Usage Data may include information such as:

• Your Device's Internet Protocol address (e.g. IP address)
• Browser type
• Browser version
• The pages of our Service that You visit
• The time and date of Your visit
• The time spent on those pages
• Unique device identifiers
• Other diagnostic data

When You access the Service by or through a mobile device, We may collect certain information automatically, including:

• The type of mobile device You use
• Your mobile device's unique ID
• The IP address of Your mobile device
• Your mobile operating system
• The type of mobile Internet browser You use
• Unique device identifiers
• Other diagnostic data

Face Data and Camera Processing

Lumen may process camera frames on your device to detect face bounds and limited facial landmarks, such as eye and nose positions, solely for the purpose of placing decorative face overlays during preview, recording, and export.

This processing happens entirely on your device. Lumen does not use face data to identify you, verify your identity, estimate your age, authenticate you, track you, create a biometric profile, or serve advertising.

Lumen does not store face templates, faceprints, biometric identifiers, or raw facial landmark data, and does not share face detection data with third parties.

Temporary face detection results are kept only in memory while needed for overlay placement and are discarded immediately after processing.

Videos and thumbnails created by the user may be stored locally on the device until the user deletes them or deletes the app.

Use of Your Personal Data

The Company may use Personal Data for the following purposes:

• To provide and maintain our Service, including monitoring the usage of our Service.
• To manage Your Account and registration as a user of the Service.
• For the performance of a contract.
• To contact You by email, telephone calls, SMS, push notifications, or other equivalent forms of electronic communication.
• To provide You with news, special offers, and general information about other goods, services and events unless You opt out.
• To manage Your requests.
• For business transfers such as mergers, acquisitions, or asset sales.
• For analytics, improving the Service, evaluating promotional campaigns, and enhancing user experience.

Sharing of Your Personal Data

We may share Your Personal Data in the following situations:

• With Service Providers to monitor and analyze the use of our Service or contact You.
• For business transfers during mergers, acquisitions, or financing.
• With Affiliates who are required to honor this Privacy Policy.
• With business partners to offer products, services, or promotions.
• With other users if You interact in public areas of the Service.
• With Your consent for any other purpose.

Retention of Your Personal Data

The Company will retain Your Personal Data only for as long as is necessary for the purposes set out in this Privacy Policy.

Where possible, We apply shorter retention periods and/or reduce identifiability by deleting, aggregating, or anonymizing data.

Account Information

• User Accounts: retained for the duration of your account relationship plus up to 24 months after account closure.

Usage Data

• Application usage statistics: up to 24 months.
• Server logs (IP addresses, access times): up to 24 months.

We may retain Personal Data longer when required for:

• Legal obligations
• Legal claims
• Your explicit request
• Technical limitations such as backup systems

When retention periods expire, We securely delete or anonymize Personal Data.

Transfer of Your Personal Data

Your information, including Personal Data, may be processed at the Company's operating offices and in other locations where the parties involved in the processing are located.

Where required by applicable law, We will ensure that international transfers are subject to appropriate safeguards.

Delete Your Personal Data

You have the right to delete or request that We assist in deleting the Personal Data that We have collected about You.

You may update, amend, or delete Your information through Your Account settings or by contacting Us.

Please note that We may retain certain information when legally required to do so.

Disclosure of Your Personal Data

Business Transactions

If the Company is involved in a merger, acquisition, or asset sale, Your Personal Data may be transferred.

Law Enforcement

The Company may disclose Your Personal Data if required by law or in response to valid requests by public authorities.

Other Legal Requirements

The Company may disclose Your Personal Data to:

• Comply with legal obligations
• Protect and defend the rights or property of the Company
• Prevent or investigate wrongdoing
• Protect users or the public
• Protect against legal liability

Security of Your Personal Data

The security of Your Personal Data is important to Us, but no method of transmission over the Internet or method of electronic storage is 100% secure.

While We strive to use commercially reasonable means to protect Your Personal Data, We cannot guarantee its absolute security.

Children's Privacy

Our Service does not address anyone under the age of 16.

We do not knowingly collect personally identifiable information from anyone under 16 without parental consent where required by law.

If We become aware that We have collected Personal Data from a child without appropriate consent, We will take steps to remove that information.

Links to Other Websites

Our Service may contain links to third-party websites that are not operated by Us.

We strongly advise You to review the Privacy Policy of every site You visit.

We have no control over and assume no responsibility for third-party content or privacy practices.

Changes to this Privacy Policy

We may update Our Privacy Policy from time to time.

We will notify You of any changes by posting the new Privacy Policy on this page and updating the "Last updated" date.

You are advised to review this Privacy Policy periodically.

Contact Us

If you have any questions about this Privacy Policy, You can contact Us:

• By email: zhangwenl1993@163.com