Terms of Use

Last Updated: August 19, 2026

These Terms of Use (hereinafter referred to as "Terms") constitute a legally binding agreement between you (hereinafter referred to as "User" or "You") and GZ Medi Group (HK) Company Limited (hereinafter referred to as "We", "Us" or "Service Provider") regarding the use of the Authenticator App: 2FA Auth mobile application (hereinafter referred to as "the App" or "the Service").

1. Nature of Service and Subscription

The App provides two-factor authentication code generation, account organization, QR code scanning, app lock and related security tools. The App may operate under a "Free Download + Paid Subscription" or "Free Download + In- App Purchase" model.

• Utility Nature: The App is a software security utility. It is not a cloud vault, identity verification service, banking service, password manager guarantee, cybersecurity warranty or account recovery service unless a specific feature expressly states otherwise.
• Subscription Services: Certain features of the App, such as unlimited accounts, backup or export tools, premium app lock options, cross-device convenience features, ad-free experience or additional security utilities, may require an active paid subscription or one-time in-app purchase.
• Payment and Authorization: Upon confirmation of purchase, payment will be charged to your Apple ID account. Subscription access may be managed through Apple's platform and, where applicable, Adapty SDK. You confirm that each purchase or subscription action through your Apple ID is an expression of your true intent.
• Nature of Digital Goods:
  • Immediate Delivery: Paid features provided by this App are classified as digital content and online service. Once you initiate the purchase or subscription and the service is activated, the service is deemed to have been delivered.
  • Availability equals Service: Subscription fees cover the availability of paid features and related service resources. Regardless of whether you actually open or use the App, subscription fees may apply. No refunds will be granted by us for "non-use," "forgetting to cancel," or "lack of knowledge."
• Auto-Renewal: Subscriptions automatically renew unless auto-renew is turned off in your Apple ID Account Settings at least 24 hours before the end of the current period.
• Subscription Management: You can manage or cancel your subscriptions at any time after purchase in your Apple ID Account Settings. Deleting the App does not automatically cancel the subscription.
• Free Trial: If a free trial period is offered, it will automatically convert to a paid subscription at the end of the trial unless canceled in time through Apple. Please monitor your subscription status before the trial ends.

2. Security Responsibility and Backup Notice

• Your Content: You retain ownership of account names, secret keys, backup codes and other content you add to the App. You are solely responsible for ensuring that you have the right to store and manage such content.
• Backup Responsibility: You should maintain independent backups of important 2FA secret keys and recovery codes. If the App offers export or backup features, you remain responsible for verifying that the backup or export has completed successfully.
• No Recovery Guarantee: We cannot guarantee recovery of deleted, corrupted, inaccessible or passcode-protected authenticator content, especially where such content is stored only locally or protected by device-level security.
• Time Accuracy: You are responsible for keeping your device clock accurate. Incorrect time settings may cause one-time passwords to fail.

3. User Responsibilities and Prohibited Use

• Lawful Use: You agree to use the App only for lawful personal purposes and in accordance with these Terms and applicable laws.
• Device and Account Security: You are responsible for maintaining the security of your device, Apple ID, authenticator accounts and App access.
• No Misuse: You must not use the App to circumvent security controls, impersonate another person, facilitate unlawful access, or interfere with any third-party account or service.
• Prohibited Activities: You agree not to reverse engineer, decompile, disassemble, modify, distribute, resell, exploit, interfere with, bypass payment controls, or create derivative works based on the App except as expressly permitted by applicable law.

4. Intellectual Property

The App and all its content, including but not limited to source code, databases, software, designs, security tools, interface elements, text, graphics, icons, trademarks, service marks and logos, are owned by or licensed to the Service Provider and are protected by copyright, trademark and other intellectual property laws. Except for the limited right to use the App in accordance with these Terms, no rights are transferred to you.

5. Disclaimer of Warranties

(Note for US Users: Please pay attention to the capitalized text below.)

TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, THE APP AND SERVICES ARE PROVIDED "AS IS" AND "AS AVAILABLE," WITHOUT WARRANTIES OF ANY KIND, WHETHER EXPRESS OR IMPLIED.

• NO WARRANTY: WE EXPRESSLY DISCLAIM ALL WARRANTIES, INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE, QUIET ENJOYMENT AND NON-INFRINGEMENT.
• NO CODE GUARANTEE: WE DO NOT WARRANT THAT ANY ONE-TIME PASSWORD, SECRET KEY, ACCOUNT LABEL DISPLAY, BACKUP, EXPORT OR SECURITY RESULT GENERATED OR STORED BY THE APP WILL BE ACCURATE, COMPLETE, RELIABLE OR SUITABLE FOR ANY PARTICULAR PURPOSE.
• NO SECURITY GUARANTEE: ALTHOUGH THE APP MAY PROVIDE AUTHENTICATION AND LOCKING FEATURES, WE DO NOT WARRANT THAT THE APP WILL PREVENT ALL UNAUTHORIZED ACCESS, DEVICE COMPROMISE, OPERATING SYSTEM VULNERABILITIES OR THIRD-PARTY ACCESS.
• SERVICE INTERRUPTIONS: WE DO NOT WARRANT THAT THE APP WILL BE UNINTERRUPTED, TIMELY, SECURE, ERROR-FREE OR COMPATIBLE WITH EVERY DEVICE, OPERATING SYSTEM VERSION OR HARDWARE CONDITION.
• THIRD-PARTY RELIANCE: CERTAIN FUNCTIONS MAY RELY ON APPLE SERVICES, FIREBASE ANALYTICS, ADAPTY, CAMERA, PHOTOS, FACE ID / TOUCH ID, DEVICE TIME OR OPERATING SYSTEM PERMISSIONS. WE ARE NOT RESPONSIBLE FOR FAILURES CAUSED BY THESE FACTORS.

6. Updates and Modification of Service

We reserve the right to modify, suspend or discontinue the App, any feature, any paid plan or any part of the Service at any time where permitted by law. We may also release updates to fix bugs, improve performance, change features, maintain compatibility or comply with platform requirements.

7. Third-Party Links, Services and Costs

• Data Usage: Using the App may generate mobile data or internet traffic for analytics, purchase validation, crash diagnostics, subscription management or support. Any carrier charges or internet costs are borne by you.
• Third-Party Services: The App may contain links to third-party websites or rely on third-party services such as Apple App Store, StoreKit, Firebase Analytics, Adapty SDK or crash reporting services. We assume no responsibility for the content, privacy policies, terms or practices of third parties.

8. Governing Law and Dispute Resolution

• General Principle: Except as provided in Section 12 below, these Terms shall be governed by and construed in accordance with the laws applicable to the Service Provider, without regard to conflict of law principles.
• International Consumers: If you are a consumer resident in a jurisdiction with mandatory consumer protection laws, you may also benefit from the mandatory provisions of the law of your country or region of residence.

9. Changes to Terms

We reserve the right to update these Terms at any time. The updated Terms will take effect immediately upon posting in the App or on the relevant policy page unless a later effective date is stated. You are advised to review this page periodically. Your continued use of the App after updated Terms take effect constitutes your acceptance of the updated Terms.

10. Refunds, Subscription Management and Disclaimer

• Platform Rules Priority: Billing and subscription management are handled through the Apple App Store platform, with entitlement management supported by Adapty SDK. All transactions are subject to Apple's terms, policies and refund rules.
• No Direct Refund Authority: As developers, we do not have access to your Apple payment account and cannot process refunds or cancellations directly.
  • Request a Refund: Please visit Apple's official channel reportaproblem.apple.com to submit your request. Apple's decision controls refund approval.
  • Cancel Subscription: Go to your iPhone "Settings" -> "Apple ID" -> "Subscriptions" and manage the subscription there.
• Waiver of Claims: To the maximum extent permitted by law, if Apple rejects a refund request, you agree not to file additional claims against us for transactions already reviewed under Apple's refund process, except where prohibited by applicable consumer protection law.

11. Contact

• Company: GZ Medi Group (HK) Company Limited
• Technical Support: If you encounter functional issues or have suggestions, please contact us via email: 2fafeedback@protonmail.com

12. Local Law Override

If you reside in the United States, the following provisions apply and override conflicting provisions above:

12.1 Limitation of Liability (US)

TO THE FULLEST EXTENT PERMITTED BY LAW, IN NO EVENT SHALL THE SERVICE PROVIDER BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, EXEMPLARY OR PUNITIVE DAMAGES, OR ANY LOSS OF PROFITS OR REVENUES, WHETHER INCURRED DIRECTLY OR INDIRECTLY, OR ANY LOSS OF DATA, USE, GOODWILL, AUTHENTICATION RESULTS, BACKUPS, EXPORTS, BUSINESS OPPORTUNITIES, DEVICE FUNCTIONALITY OR OTHER INTANGIBLE LOSSES, RESULTING FROM (A) YOUR ACCESS TO OR USE OF OR INABILITY TO ACCESS OR USE THE APP; (B) ANY CODE GENERATION ERROR, BACKUP ERROR, EXPORT ERROR, DATA LOSS, DEVICE DAMAGE, STORAGE FAILURE OR FILE CORRUPTION; (C) ANY UNAUTHORIZED ACCESS TO OR USE OF OUR SERVERS AND/OR ANY PERSONAL INFORMATION STORED THEREIN; OR (D) ANY THIRD-PARTY SERVICE OR PLATFORM ACTION. IN NO EVENT SHALL OUR AGGREGATE LIABILITY EXCEED THE AMOUNT YOU PAID US, IF ANY, IN THE PAST SIX MONTHS FOR THE SERVICES GIVING RISE TO THE CLAIM.

12.2 Class Action Waiver

YOU AND THE SERVICE PROVIDER AGREE THAT EACH MAY BRING CLAIMS AGAINST THE OTHER ONLY IN YOUR OR ITS INDIVIDUAL CAPACITY AND NOT AS A PLAINTIFF OR CLASS MEMBER IN ANY PURPORTED CLASS OR REPRESENTATIVE ACTION.

Unless both you and the Service Provider agree, no arbitrator or judge may consolidate more than one person's claims or otherwise preside over any form of a representative or class proceeding.

12.3 Mandatory Arbitration

Any dispute, claim or controversy arising out of or relating to these Terms or the breach, termination, enforcement, interpretation or validity thereof, including the determination of the scope or applicability of this agreement to arbitrate, shall be determined by arbitration rather than in court, except that you may assert claims in small claims court if your claims qualify.

12.4 California Residents Notice

If you are a California resident, in accordance with Cal. Civ. Code § 1789.3, you may report complaints to the Complaint Assistance Unit of the Division of Consumer Services of the California Department of Consumer Affairs by contacting them in writing at 1625 North Market Blvd., Suite N 112, Sacramento, CA 95834, or by telephone at (800) 952-5210.