1. Introduction and Scope

BacInk (hereinafter referred to as "we", "the company", or "BacInk") values your privacy and personal data protection. This privacy policy explains how we collect, process, utilize, store, share, and protect your personal data.

This policy applies when you visit or use the BacInk website, member accounts, newsletters, contact forms, technical content, Eink Mode products, free or paid plans, subscription services, payment features, customer support, and related website functions (collectively referred to as "the services").

By using the services, registering an account, using Eink Mode, subscribing to newsletters, completing payments, or contacting us, you acknowledge that you have read and understood this policy. If you do not agree with this policy, please stop using the services.

1.1 Translated Versions

This document may provide translated versions in other languages. In case of any conflicts, uncertainties, or significant inconsistencies between the translated versions and the traditional Chinese version, the traditional Chinese version shall prevail.

2. Data We Collect

2.1 Data You Provide Actively

  • Account Registration and Login Data: Email address, username, login credentials, account identifier, avatar, or any other data you provide in your account.
  • Third-Party Login Data: When you choose to log in with Google or other third parties, we may receive basic data provided by that third party, such as name, email address, avatar, third-party account identifier, and verification status.
  • Membership and Subscription Data: Plan type, subscription status, activation time, renewal time, cancellations, withdrawal of cancellations, upgrades, downgrades, payment failures, refunds, and other plan management records.
  • Payment and Transaction Data: Transaction number, payment status, type of payment method, payment currency, transaction amount, deduction time, refund records, invoicing or accounting tax information required, and necessary transaction results returned by NewebPay, PayPal, issuing banks, or acquiring institutions.
  • Eink Mode and Product Usage Data: Settings, preferences, usage records, operation logs, error logs, device and browser information provided or generated while using the products, as well as any content submitted, uploaded, converted, or processed by you.
  • Contact, Customer Service, and Feedback Data: Name, email address, message content, attachments, problem descriptions, customer service interactions, rights applications, and processing records.
  • Newsletter Data: Email address, subscription status, subscription confirmation records, unsubscription records, and newsletter interaction records.

2.2 Automatically Collected Data

  • Connection Data: IP address, connection time, request path, referring page, language settings, and approximate geographical location.
  • Device and Browser Data: Device type, operating system, browser type and version, screen size, time zone, user agent string, and related technical information.
  • Usage Data: Page views, clicks, feature usage, time spent, error events, performance data, logins, and security events.
  • Cookies and Local Storage: Language preferences, cookie consent status, login session data, analytical identifiers, and other data necessary to operate the services.

2.3 Data from Third Parties

We may obtain necessary data from authentication services, third-party login services, payment or transaction service providers, email services, analytics services, customer service tools, or other service providers to complete login authentication, payment processing, subscription management, security protection, customer service support, and service maintenance.

3. Cookies, Local Storage, and Tracking Technologies

3.1 Cookies and Similar Technologies We Use

Name or Type Purpose Type Validity
preferredLanguage Store your chosen language preference Functional Depends on browser or service settings
bacink_cookie_consent Save your cookie consent or opt-out status and timestamp, used to determine whether to load analytical tools Necessity/Preference Depends on browser or service settings
Authentication/Session-related Data Maintain login status, authentication, plan permissions, and security controls Necessity Depends on session and authentication service settings
_ga* or other analytical identifiers Google Analytics for analyzing website traffic and service usage Analytical Depends on Google settings, generally lasts about 2 years

3.2 Google Tag Manager and Google Analytics

We may use Google Tag Manager to load Google Analytics or other analytical tools to understand website traffic, feature usage, errors, and service performance. For analytical cookies, we adopt an "implied consent" model: when you enter this website, Google Tag Manager and analytical tools are loaded by default, except for necessary cookies, and continuing to browse this website indicates your consent. You may opt-out at any time via the "opt-out" link in the cookie notification banner; once you opt-out, we will record your opt-out status and will no longer load the relevant analytical tools.

Google Analytics may process cookie IDs, page views, interaction data, device and browser information, approximate geographical location, and IP addresses processed as per Google's settings. Google will process such data according to its privacy policy. For more information, please refer to Google Privacy Policy.

3.3 Cookie Management

You can view, delete, or block cookies through your browser settings, and you can browse in incognito mode or private mode. Disabling necessary cookies may cause issues with login, membership, subscriptions, payments, or language preferences.

For analytical tracking, you can directly use the "opt-out" link in the cookie notification banner on this website; after opting out, we will no longer load Google Tag Manager and analytical cookies. You can also install Google Analytics Opt-out Browser Extension, or restrict third-party cookies in your browser to further reduce analytical tracking.

4. How We Use Data

We collect, process, and utilize your data within the necessary scope for the following purposes:

  • Providing the Services: Establishing accounts, login authentication, maintaining membership functions, providing Eink Mode, syncing settings, managing plan permissions, and service status.
  • Subscriptions and Payments: Processing subscriptions, payments, renewals, cancellations, upgrades, downgrades, payment failures, refunds, transaction reconciliations, invoicing, tax, and accounting matters.
  • Customer Service and Communication: Responding to inquiries, providing technical support, processing rights applications, sending service notifications, payment notifications, notices regarding terms or policy changes, and newsletters you subscribed to.
  • Security and Preventing Abuse: Detecting unauthorized logins, fraud, payment abnormalities, abuses, violations of terms, attacks, system risks, and other illegal or improper behaviors.
  • Service Maintenance and Improvement: Debugging, analyzing performance, understanding feature usage, improving product quality, developing new features, and generating aggregate or anonymized statistical data.
  • Legal, Tax, and Dispute Handling: Complying with applicable laws, requirements from authorities or courts, maintaining necessary records, asserting, exercising, or defending legal rights.

5. Third-Party Services and Data Sharing

We do not sell your personal data. We only share or delegate processing of data with third parties to the extent necessary for providing the services, completing transactions, fulfilling contracts, maintaining security, complying with laws, or with your consent.

  • Authentication and Database Services (e.g., Supabase): Used for account creation, login authentication, session management, member data, and service data storage.
  • Third-Party Login Services (e.g., Google): Used to complete authentication when you choose third-party login.
  • Payment and Transaction Services (NewebPay, PayPal): Used to process subscriptions, payments, credit card verifications, transaction authorizations, deductions, refunds, transaction denials, risk controls, and transaction records.
  • Issuing Banks, Acquiring Institutions, and Financial Service Providers: Used for payment authorizations, settlements, reconciliations, dispute payments, refunds, foreign currency conversions, and handling fees.
  • Email and Notification Service Providers: Used for sending newsletters, verification emails, service notifications, payment notifications, and customer service responses.
  • Analysis Services (e.g., Google Analytics): Used for analyzing website traffic, feature usage, and service effectiveness.
  • Customer service, cloud, monitoring, debugging, and security service provider: Used for operations, support, troubleshooting, security protection, and system monitoring.
  • Legal, accounting, tax, regulatory authorities, or parties related to dispute resolution: Provide necessary information as required by law for legal matters, tax accounting, dispute resolution, or to protect our, users', or third parties' rights.

We do not store complete credit card numbers. Full credit card information is usually processed according to the rules set by NewebPay, PayPal, issuing banks, or acquiring institutions; we may retain transaction records, payment status, subscription status, invoices, or information required for accounting or tax purposes.

6. Data Retention Period

We will retain data based on the nature of the information, purpose of use, legal requirements, contract fulfillment, dispute resolution, and security needs:

  • Account Information:Kept for the duration of the account; after account deletion, necessary records will be deleted, anonymized, or retained for a reasonable period as required by law and security needs.
  • Login and Security Records:Stored according to authentication, security, anti-abuse, and auditing requirements, usually for a short term, but may be extended in cases involving security incidents, fraud, or disputes.
  • Subscription, Transaction, Payment and Invoice Information: Necessary retention period as per contract fulfillment, refunds, dispute resolution, financial regulations, accounting and tax laws.
  • Eink Mode Data, Settings, and Content Usage: Stored during the period necessary for providing product features, synchronization, debugging, support, and account services; when an account is deleted or data is cleared, handled according to product limitations, backup cycles, and legal requirements.
  • Customer Service and Contact Records: Kept for the duration necessary to handle your inquiries, support, rights requests, or disputes.
  • Newsletter Information: >Stored until you unsubscribe or we stop providing the newsletter; after unsubscribing, we may retain necessary records to prevent future mailings.
  • Analysis Data: Based on Google Analytics or related analysis services configuration, usually saved in aggregated, anonymous, or pseudonymized form.

After you delete your account or cancel your subscription, it does not mean that all your data will be immediately deleted. We may continue to retain certain data for as long as necessary for legal compliance, tax, accounting, financial, backup, security, fraud prevention, or dispute resolution purposes.

7. Data Security and Incident Notification

We implement reasonable technical and organizational measures to protect personal data, including HTTPS encryption, access control, authentication, log monitoring, vendor management, and security maintenance measures.

However, no method of transmission over the internet or electronic storage can guarantee absolute security. If we become aware that the personal data we hold has been stolen, leaked, altered, damaged, lost, or if any other security incident occurs, we will take necessary response measures in accordance with the law, and notify affected users and relevant authorities when required by applicable laws or when it has significant implications.

8. Your Rights

According to applicable personal data protection laws, you have the following rights regarding your personal data:

  • Query or request to view.
  • Request for a duplicate copy.
  • Request for Supplement or Correction.
  • Request to stop collecting, processing, or using.
  • Request to delete.
  • Revoke the consent you previously provided, but the withdrawal does not affect any processing that was carried out with the consent prior to the withdrawal.

If you wish to exercise the above rights, delete your BacInk account, or inquire about data processing, please contact us using the contact details below this policy. We may need to verify your identity and may charge a fee based on legal requirements or necessary costs.

If the law provides otherwise, the data is necessary for the performance of a contract or legal obligation, or deletion would hinder safety, tax, accounting, dispute resolution, or third-party rights, we may not be able to fully comply with your request but will explain the reason to you.

9. Impact of Not Providing Information

You can choose whether to provide personal information. However, if you do not provide the necessary information, we may not be able to create an account, complete login, offer Eink Mode, process subscriptions or payments, send notifications, respond to customer service inquiries, provide invoices, or fulfill certain functions of this service.

10. Privacy of Minors

Users who are under the legal age of adulthood must use this service and related paid services with the consent of their legal guardians. We do not intentionally market to minors or collect information that is not necessary for providing this service.

If we discover or have reasonable suspicion that a minor is using this service without the consent of their legal guardian, we reserve the right to restrict, suspend, or terminate their account, and to the extent reasonable, delete or cease processing related personal data.

11. International Data Transmission

Because the cloud, authentication, third-party login, payment processing, analytics, email, customer service, or security services we use may be located outside of Taiwan, your data may be transferred to, stored in, or processed in countries or regions outside of Taiwan, including the regions where the service providers or their infrastructure are located.

The data protection laws in these areas may differ from those in your location. We will reasonably require service providers to take appropriate protective measures and handle cross-border data transfers in accordance with applicable laws.

12. Users from the EU, UK, or other regions

If you are located in the EU, the UK, or other regions with specific data protection laws, you may have additional rights under local laws, such as the right to data portability, the right to restrict processing, the right to object to processing, and the right to lodge a complaint with a supervisory authority.

Our legal bases for processing personal data may include fulfilling a contract, legitimate interests, compliance with legal obligations, protecting vital interests, and your consent. You can submit related requests to us using the contact information provided at the bottom of this policy.

13. Policy Changes

We may update this privacy policy from time to time. Significant changes will be communicated to you through website announcements, member center, email, or other appropriate means. Unless a specific effective date is indicated in the notification, the updated policy will take effect upon publication.

If you do not agree to the updated policy, please stop using this service. Continuing to use this service after the updates take effect indicates that you have understood the updated policy.

14. Contact Us

If you have any questions about this privacy policy, how we handle personal data, or exercising your rights, please contact us through the following methods:

  • Email: bacink.contact@gmail.com

15. Effective Date

This privacy policy will take effect on December 31, 2025.

Last Updated: July 23, 2026