Terms of Service

1. Agreement to terms

By creating an EngX account or using EngX, you agree to these Terms and acknowledge our Privacy Policy. If you do not agree, do not use EngX.

2. Eligibility / account requirements

You need a valid account, created via email/password sign-in or through a supported OAuth provider (Google, LinkedIn), to use most of EngX. EngX does not currently verify age at signup. LEGAL REVIEW REQUIRED — minimum user age has not been decided; see our Privacy Policy §30.

3. Account responsibility

You are responsible for maintaining the confidentiality of your account credentials and for all activity under your account. Notify us promptly if you suspect unauthorized access.

4. Acceptable use

Use EngX only for its intended purpose — practicing and learning engineering problem-solving. Do not attempt to circumvent grading, access another user's data, disrupt the service, or use EngX for any unlawful purpose.

5. Prohibited conduct

• Attempting to access accounts, data, or systems you're not authorized to access.
• Reverse-engineering, scraping, or automating interactions with EngX beyond normal use.
• Uploading unlawful, infringing, or abusive content (including via issue reports or profile pictures).
• Interfering with the security or integrity of the platform.

6. Educational nature of EngX

EngX provides engineering practice problems and educational tools. Content, feedback, and automated grading are provided for learning and self-assessment purposes.

7. No professional engineering advice

EngX's content, problems, and generated explanations are educational only. They are not professional engineering advice, are not a substitute for the judgment of a licensed professional engineer or your instructor, and may contain errors. You remain solely responsible for the academic and professional decisions you make, including any reliance on EngX content in real-world engineering work.

8. User submissions / content

You retain ownership of content you submit to EngX (such as issue-report descriptions, screenshots, and profile information). By submitting it, you grant EngX a license to use it solely to operate and improve the service (e.g., reviewing bug reports, displaying your profile back to you).

9. EngX intellectual property

The EngX platform, brand, and problem library (excluding your own submissions) are owned by EngX or its licensors. You may not copy, redistribute, or create derivative works from EngX content outside of normal personal use of the product.

10. Problem / content licensing

Access to problem content is governed by your subscription tier (§11). Problem content is licensed for your personal learning use only, not for redistribution or commercial use.

11. Subscription tiers

EngX currently offers a Free tier and one or more paid subscription tiers with expanded problem access, billed monthly through Stripe. Exact tier names, feature sets, and prices are shown on the Pricing page and are subject to change; the Pricing page, not this document, is the current source of truth for pricing.

12. Pricing

Paid tier prices are set and displayed at checkout. EngX may change prices for future billing periods; we will make reasonable efforts to notify you before a price change takes effect on your subscription. LEGAL REVIEW REQUIRED — the specific notice period required for price changes has not been defined.

13. Billing

Paid subscriptions are billed through Stripe. By subscribing, you authorize EngX (via Stripe) to charge your payment method on a recurring basis for your selected tier.

14. Renewal

Paid subscriptions renew automatically at the end of each billing period unless cancelled beforehand.

15. Cancellation

You can cancel your subscription at any time through the Stripe billing portal, accessible from Settings. If you delete your EngX account, any active subscription is cancelled immediately as part of account deletion, rather than continuing until the end of the current billing period — because access is being permanently revoked at that point.

16. Refunds

LEGAL REVIEW REQUIRED — EngX has not defined a refund policy. No refund right is promised or implied by this document beyond what applicable consumer protection law separately requires.

17. Free / paid feature availability

Feature availability by tier is described on the Pricing page. Free-tier access does not require a credit card.

18. Changes to the service / features

EngX may add, modify, or remove features at any time as the product evolves. We will make reasonable efforts to avoid materially reducing what a paying subscriber has already paid for within a current billing period.

19. Account suspension / termination

We may suspend or terminate accounts that violate §4–5 of these Terms. Administrators can disable or remove accounts through EngX's internal admin tools.

20. User-initiated deletion

You may permanently delete your own account at any time from Settings → Privacy Centre → Danger Zone. See our Privacy Policy §23 for what deletion does and does not remove.

21. Third-party services

EngX relies on third-party service providers (authentication/hosting, payments, analytics — see Privacy Policy §20) to operate. EngX is not responsible for the availability or acts of these third parties beyond our own integration with them.

22. Service availability

EngX is provided on an "as available" basis. We do not guarantee uninterrupted or error-free operation.

23. Accuracy / disclaimer

EngX's problem content, automated grading, and any AI-assisted explanations may contain errors. EngX makes no warranty as to the accuracy or completeness of any content. See §7 (no professional engineering advice).

24. Limitation of liability

LEGAL REVIEW REQUIRED — the specific scope and wording of any liability limitation has not been finalized by legal counsel and is intentionally not drafted here.

25. Indemnity

LEGAL REVIEW REQUIRED — whether an indemnification clause is appropriate, and its wording if so, has not been determined.

26. Governing law / jurisdiction

LEGAL REVIEW REQUIRED — LEGAL REVIEW REQUIRED — governing law and jurisdiction not yet finalized. No arbitration clause or class-action waiver is included in these Terms; none will be added without explicit legal and business approval.

27. Changes to these Terms

We may update these Terms as EngX's product and business practices change. Material changes will be reflected by incrementing the version number and effective date at the top of this page. LEGAL REVIEW REQUIRED — what constitutes a "material" change requiring direct user notice has not been defined.

28. Contact

Questions about these Terms can be sent to support@engx.app.