Terms of Use

These are the terms and conditions applicable to the Light Service. By downloading, registering for, or using any part of the application, you expressly agree to be bound by this legal contract.

1. Who are we?

The Light app is maintained, managed, and distributed by an Independent Individual Developer. All customer support and application management are conducted directly and personally, without corporate or partnership involvement of any kind.

2. Important Definitions

• "Consumer": Any individual using the Service exclusively for personal, non-commercial purposes.
• "Content": Folders, study decks, flashcards, text, statistics, images, or audio displayed or stored through the application.
• "Store": The official platform from which you downloaded the app (Apple App Store or Google Play Store).
• "Store Rules": Any additional terms or download rules established by the Store.

3. Effective Date of Agreement

The legal contract between you and the Developer takes effect at the exact moment you download the app or complete account registration on the Service. For users downloading the mobile app, this is an End User License Agreement (EULA) entered into between you and the Developer (not with the Store).

4. Right of Use and Rules of Conduct

You receive a personal, limited, non-transferable, and revocable license to use the software on your devices. You formally agree not to:

• Violate any local laws or third-party intellectual property rights.
• Post Content containing inappropriate, abusive, hateful, criminal, or explicit material.
• Use bots, data scraping scripts, or attempt to overload or damage Firebase servers in any way.
• Intentionally exploit programming bugs discovered in the software.

5. Account Requirements and Security (Verification, Biometrics, and Leaderboard)

To ensure data security and legitimate use of app features, you agree to the following conditions:

• Email Verification: To access cloud synchronization features and join the Leaderboard, verifying your email address via the confirmation link sent by the system is mandatory. Access to these tabs may be temporarily blocked or limited if your email is unverified.
• Biometric Authentication: By enabling biometric lock, you assume responsibility for keeping your device secure. As credentials are managed and validated locally by your device operating system, the developer assumes no liability if authorized third parties on your device (with fingerprints or faces registered on the system) access the app.
• Friends Leaderboard Participation: Comparing progress with friends requires entering your mobile phone number. You agree to provide a correct and updated phone number. Matching is performed strictly based on cryptographic hashes (SHA-256) of local contacts.

6. Your Content (Decks and Flashcards)

You remain the owner of all Content inserted into your flashcards. However, you grant the developer a free, worldwide technical license to host and transmit your data exclusively for cloud sync and backup purposes. If you share your decks in the public library, this license becomes permanent and perpetual to allow access by other users.

7. Payments and Premium Subscriptions

The app offers a Premium subscription to unlock extra features. The developer does not collect, process, or store banking or credit card details. All charges, recurring renewals, and transactions are processed end-to-end by the Google Play Store or Apple App Store according to each platform's payment terms.

8. Limitation of Liability

The Service is provided on an "as is" and "as available" basis. The individual developer does not guarantee that the software will be error-free or uninterrupted. The developer is exempt from any obligation to indemnify material, moral, or data loss damages resulting from server instability, Google Firebase cloud sync failures, or OS update incompatibilities (iOS and Android).

9. Governing Law and Dispute Resolution

This contract is governed and construed in accordance with applicable local laws. To resolve any disputes or judicial controversies arising from this agreement, the parties elect the jurisdiction of the developer's domicile.