1.1 Contracting Parties:

Service Provider:
Name: Mihály Kiss Sole Proprietorship
Registered Seat: 6034 Helvécia, Gazdasági dűlő 73., Hungary
Tax number: 91730424-1-23
Email: [email protected]
Legal inquiries: [email protected]
Privacy inquiries: [email protected]

User (Client):
Any natural or legal person, or unincorporated business entity, registering to use or accessing the Service.

1.2 Subject of the Agreement:
These General Terms and Conditions (hereinafter: "ToS") govern the terms and conditions under which the Service Provider provides its Preds AI-powered text detection service (accessible at https://preds.hu, hereinafter: "Service").

1.3 Definitions:
• Service: The Preds web application and API platform analyzing Hungarian texts via machine learning to determine whether content was authored by a human or synthesized by artificial intelligence.
• User Account: A unique identity created upon registration granting access to the Service.
• API Key: A unique secret token (format: sk_live_*) enabling programmatic API access tied to a User Account.
• Detection / Verification: An individual text analysis transaction in which the Service generates an AI likelihood prediction.
• Quota: The monthly allocation of detections or words available under an active subscription.
• Credit: A prepaid accounting unit entitling the User to analyze a specific volume of text without expiration. As of September 11, 2026, 1 credit equals 1,000 words of text analysis (previously 10,000 characters).
• Word: The base billing unit, determined according to two rules:
(1) Any sequence of characters delimited by whitespace counts as one word. Delimiters include spaces, line breaks, tabs, and all other blank characters, regardless of letters, numbers, or punctuation (e.g., "dog" = 1 word · "e-mail" = 1 word · "3.14" = 1 word · "---" = 1 word).
(2) Unbroken character sequences exceeding 30 characters count as multiple words, calculated by dividing the character count by 30 and rounding up (e.g., a 30-character string = 1 word; a 31-character string = 2 words; a 90-character URL = 3 words). This ensures accounting reflects actual computational processing overhead.

1.4 Scope of the ToS:
These Terms apply to all visitors and users of the Service, including unauthenticated visitors, free tier users, credit pack holders, and paid subscribers. By using the Service, registering an account, or making a purchase, the User unconditionally accepts these Terms.

2.1 Formation of Contract:
The contract is concluded upon User registration and successful email verification. During registration, the User explicitly accepts these Terms, the Privacy Policy, and consents to data processing.

Registration is available via:
• Email and password, subject to verification link confirmation, or
• Google Account ("Continue with Google"), where the verified email provided by Google serves as confirmed without a separate confirmation email.

Accounts created via Google Sign-In are legally equivalent in all respects to accounts registered via email and password.

2.2 Age Limits and Legal Capacity:
The Service is accessible to users aged 10 and older:
• Users aged 16 or older may enter into this agreement independently.
• Users aged 10 to 15 may use the Service only with verifiable parental or legal guardian consent. By registering, the User represents that they possess such consent.
• Children under 10 years of age are prohibited from registering or using the Service.

2.3 Contract Duration:
• Free Tier: Concluded for an indefinite duration upon registration; terminable by either party at any time without justification. Includes 2 free credits per day. The daily allowance resets to 2 credits each day and unused free credits do not roll over.
• Credit Packs: Concluded upon completed payment; remains valid until credits are exhausted. Credits have no expiration date.
• Subscriptions (Essential, Pro 6x, Pro 20x): Auto-renewing recurring contract on a monthly or annual billing cycle until cancelled.

2.4 Mandatory Registration:
Access to text detection requires registration. Detection cannot be performed without an active account.

2.5 Email Verification:
Verification of the provided email address is required. Unverified accounts may be automatically purged after a reasonable grace period.

2.6 Single Account Limitation:
Only one active account may be registered per email address. Creating multiple accounts to circumvent the free credit allowance is strictly prohibited.

3.1 Registration Requirements:
Users must provide accurate, current, and complete details during registration (valid email, first name, last name, and password with a minimum of 10 characters).

3.2 User Obligations:
• Safeguard login credentials and never share them with unauthorized parties.
• The User is solely liable for all activities conducted through their account or API keys.
• Promptly report any suspected security breach or unauthorized access to [email protected].

3.3 Authentication & Session Security:
• Automated risk-based verification: unfamiliar IP addresses or devices may trigger email verification codes.
• Users may review and revoke active sessions from account Settings.

3.4 Password Policies:
• Stored using one-way cryptographic salting and hashing.
• Password reset links are time-limited and single-use.

3.4/A Google Sign-In Provisions:
• Google-authenticated accounts do not initially require a password; a password may be added anytime via the reset mechanism.
• Users are solely responsible for the security of their underlying Google account.
• The Service Provider is not liable for service disruption caused by Google account suspensions or outages.

3.5 API Key Governance:
• API keys are stored in hashed format and shown only once upon creation.
• The User may generate multiple keys and revoke them individually.
• Keys inherit the rate limits and quotas of the User's active subscription tier.

3.6 Account Suspension and Deletion by Provider:
The Service Provider reserves the right to suspend or terminate accounts without prior notice in cases of material breach, security threats, fraudulent registration, or abuse of the free quota.

4.1 Permitted Use Cases:
The Service may be used strictly for lawful purposes, including:
• Academic integrity verification of student coursework and essays
• Publishing and editorial quality assurance of submitted manuscripts
• Enterprise verification of AI-generated content
• Scientific and linguistic research

4.2 Prohibited Activities:
Users shall not:
• Perform vulnerability testing, reverse engineering, or penetration tests without prior written consent
• Overload infrastructure using unauthorized automated bots or scrapers
• Disrupt other users' access to the Service
• Process illegal, defamatory, or copyright-infringing content
• Use the Service to train or benchmark directly competing AI text detectors
• Attempt to bypass rate limits or quota mechanisms

4.3 Privacy & Sensitive Data:
• Users must comply with GDPR and applicable privacy legislation.
• Uploading special category data (health, biometric, criminal records) of third parties without a valid legal basis is strictly prohibited.

5.1 Service Tiers:

Free Tier:
• 2 free credits per day.
• The daily allowance resets to 2 credits each day; unused free credits do not roll over.
• Web interface and API access, history storage, email support. No uptime SLA.

Credit Packs (One-Time Purchase):
• Available packs: 100, 200, or 400 credits.
• 1 credit = 1,000 words.
• No expiration date; valid indefinitely until consumed.

Subscriptions (Essential, Pro 6x, Pro 20x):
• Monthly or annual billing cycles (annual billing includes 2 months free / 10 monthly price).
• Monthly quotas reset at the end of each billing cycle; unused quotas do not roll over.
• Shared quota across web and API access.
• Priority customer support on Pro 6x and Pro 20x tiers.

5.2 Service Availability:
• The Service is operated with high availability targets, but 100% uninterrupted uptime is not guaranteed (absent a separate Enterprise SLA agreement).
• Scheduled maintenance is announced in advance where feasible; emergency patches may occur without advance notice.

5.3 Detection Accuracy & Probabilistic Nature:
• The Service does not guarantee 100% accuracy. Machine learning detections represent probabilistic assessments provided "AS IS".
• False positives and false negatives may occur. Detection scores must be interpreted with critical human judgment in context.
• Decisions with significant legal or personal consequences (academic disciplinary action, employment termination) must never be based solely on automated detector outputs without substantive human review.
• The Service is tuned specifically for the Hungarian language.

5.4 Technical Input Limits:
• Minimum text length for API detection: 60 words
• Maximum text length: 1,000,000 characters
• Supported formats: TXT, PDF, DOCX, Markdown
• Document OCR: scanned PDF up to 120 MB and 500 pages
• Handwriting OCR: image up to 8 MB and 16 megapixels (Section 5.7)
• Batch API: up to 20 documents per request

5.5 Rate Limiting:
Dynamic rate limits protect system performance. Exceeding limits returns HTTP 429 with retry headers.

5.6 Data Storage & Retention:
• Data is stored in secure Hetzner Online GmbH data centers within the EU.
• New raw submitted-text blobs are encrypted at the application level with AES-256-GCM. Related analysis metadata may contain normalized text or excerpts and is stored separately without this field-level encryption. Account deletion does not automatically delete submission records; erasure requests are assessed under applicable law and any lawful retention grounds.

5.7 Handwriting OCR Functionality:
• Optical character recognition for handwritten text is provided via Google Ireland Limited's Gemini API.
• Accuracy is provided "AS IS" and depends on image clarity and legibility. The User warrants that uploaded images do not violate third-party rights.

6.1 Pricing and Currency:
• Current rates are published at https://preds.hu/pricing.
• All prices are quoted in Hungarian Forint (HUF) as gross totals.
• The Service Provider is a small enterprise exempt from VAT ("alanyi áfamentes") under Section 187 of the Hungarian VAT Act; therefore, prices do not include VAT, and no VAT is charged.
• Notice of price changes is given at least 30 days in advance via email; price changes take effect in the next billing cycle.

6.2 Payment Methods:
• Card payments via Stripe: Processed securely through Stripe; Preds does not store card credentials.
• Recurring subscription charges renew automatically unless cancelled prior to renewal.

6.3 Payment Failures:
• Stripe Smart Retries will attempt payment up to 3 times upon failure. If unpaid, the subscription is suspended.

6.4 Upgrades and Cancellations:
• Upgrades take effect immediately with proration.
• Cancellations take effect at the conclusion of the current prepaid billing period.

6.5 Refund Policy:
• Subscriptions: Ordinary cancellation takes effect at period end; no prorated refunds for elapsed periods except where mandated by law.
• Credit Packs: Consumers are entitled to statutory withdrawal within 14 days of purchase with a proportional refund for unused credits pursuant to Section 11.6.

6.6 Invoicing:
• Compliant electronic invoices marked "alanyi áfamentes" are delivered via email within 8 days of payment.

6.7 Clerical Errors:
• In cases of obvious system pricing errors (e.g. 0 HUF subscriptions due to system defects), orders may be corrected or cancelled without liability.

7.1 Disclaimer of Consequential Damages:
To the fullest extent permitted by applicable law, the Service Provider shall not be liable for indirect, incidental, punitive, or consequential damages, lost profits, lost data, business interruptions, or decisions made on the basis of detection outputs.

7.2 Maximum Liability Cap:
For non-consumer users, total aggregate liability arising out of this agreement is capped at the total amount actually paid by the User to the Service Provider in the preceding 12 months, except in cases of intentional misconduct or gross negligence.

7.3 User Indemnification:
The User agrees to indemnify and hold harmless the Service Provider against any claims, losses, or legal costs arising from unlawful content uploaded by the User, breach of third-party IP rights, or breach of these Terms.

7.4 AS IS Provision:
The Service is provided on an "AS IS" and "AS AVAILABLE" basis without warranties of any kind, whether express or implied. Mandatory consumer statutory rights remain unaffected.

8.1 Provider Intellectual Property:
All software, neural architectures, weights, algorithms, web designs, trademarks, logos, and documentation comprising Preds remain the exclusive property of the Service Provider.

8.2 Limited License:
The Service Provider grants the User a non-exclusive, non-transferable, revocable license to access and use the Service in compliance with these Terms.

8.3 User-Submitted Content:
• Intellectual property rights in texts submitted by the User remain with the User or their respective rights holders.
• The User grants the Service Provider a limited license to process, normalize, and encrypt text for detection and history maintenance.
• The Service Provider never sells user texts or transfers them to third parties for marketing.

9.1 Termination by the User:
• Free Tier: Terminable at any time by deleting the account.
• Subscriptions: Terminable anytime via Dashboard → Billing; remains active until the end of the paid billing cycle.

9.2 Termination by the Service Provider:
The Service Provider may terminate the contract with immediate effect and suspend the User Account in case of material breach, abusive rate limit tampering, fraud, or repeated payment failure.

9.3 Account Deletion:
Initiated via Dashboard → Settings → Delete Account or by emailing [email protected]. An email verification code is required.

9.4 Post-Termination Data Schedule:
• Account deletion removes the user profile and active sessions and deletes the user's API keys, but does not automatically delete submission records, text blobs, or text-bearing analysis metadata. Those records may still contain personal data.
• Retention and deletion schedules for logs, billing records, anti-abuse records, and backups are described in the Privacy Policy; backup copies follow separate rotation schedules.
• Invoices and accounting records are retained in identifiable form for 8 years as required by Hungarian law; account deletion does not anonymize them.
• A one-way cryptographic hash of the user's email is retained for 30 days solely to prevent resetting or abusing the free credit allowance through account deletion and re-registration.

9.5 Pre-Deletion Data Export:
Users may download a comprehensive JSON/ZIP export of their account history pursuant to GDPR Article 20 prior to deleting their account.

Detailed terms governing the collection and processing of personal data are set out in the Preds Privacy Policy: https://preds.hu/privacy.

Personal data is processed for the specific purposes described in these Terms and the Privacy Policy, subject to applicable data-protection law. New raw submitted-text blobs are encrypted at the application level; associated metadata may contain normalized text or excerpts and is stored separately. Account deletion does not automatically delete submission records. Personal data is not sold to third parties.

11.1 Governing Law:
These Terms and all agreements between the parties shall be governed by and construed in accordance with the laws of Hungary, in particular the Hungarian Civil Code (Act V of 2013), Act CVIII of 2001 (e-commerce), Act CLV of 1997 (consumer protection), and Government Decree 45/2014 (distance contracts).

11.2 Amicable Resolution:
The parties agree to make good-faith efforts to resolve any disputes amicably by writing to [email protected] or [email protected].

11.3 Competent Jurisdiction:
• For Consumers: The court of the consumer's domicile or habitual residence holds jurisdiction.
• For Business Entities: The courts having jurisdiction over the Service Provider's registered seat (Kecskemét Regional Court) shall have exclusive jurisdiction.

11.4 Conciliation Board (Consumer Disputes):
Consumers may initiate out-of-court dispute resolution before the competent Hungarian conciliation board:
Bács-Kiskun County Conciliation Board
Address: 6000 Kecskemét, Árpád krt. 4., Hungary
Phone: +36-76/501-500 | Email: [email protected]

11.5 Consumer Protection Authority:
Consumers may lodge complaints with the National Authority for Trade and Consumer Protection (NKFH): https://nkfh.gov.hu/

11.6 Statutory 14-Day Right of Withdrawal (Consumers Only):
Consumers have the right to withdraw from a distance purchase within 14 days without giving any reason pursuant to Government Decree 45/2014.
• For credit packs, consumers exercising this right receive a proportional refund for unused credits (e.g., if 70% of credits were consumed, a 30% refund is issued).
• Notice of withdrawal may be sent to [email protected] using the model withdrawal form in Annex 1. Approved refunds are issued within 14 days to the original payment method.

ANNEX 1 – Model Withdrawal Form
(Complete and return only if you wish to withdraw from the contract)
To: Mihály Kiss Sole Proprietorship, 6034 Helvécia, Gazdasági dűlő 73., Hungary — Email: [email protected]
I hereby give notice that I withdraw from my contract for the provision of the following service: [Service name]
Ordered on / received on: [Date]
Consumer name: [Name]
Consumer address: [Address]
Consumer email: [Email]
Date: [Date]

12.1 Amendments to the ToS:
• The Service Provider may unilaterally amend these Terms for legitimate reasons (regulatory changes, technical enhancements, third-party vendor price changes, system security).
• Non-detrimental changes take effect upon publication.
• Detrimental changes (quota reductions, price increases) are subject to 30 days advance notice via email and dashboard announcements.
• Users not wishing to accept detrimental changes may terminate their contract with immediate effect before the change takes effect, receiving a proportional refund for unused paid services.
• Ongoing prepaid billing cycles are grandfathered until their renewal date.

12.2 Force Majeure:
Neither party shall be liable for delays or failures caused by events beyond reasonable control (natural disasters, war, cyber warfare, national telecommunication failures).

12.3 Severability:
If any provision of these Terms is found invalid or unenforceable, the remaining provisions shall continue in full force and effect.

12.4 Notices:
Notices sent to the User's registered email address are deemed officially served.

Service Provider Information:
Name: Mihály Kiss Sole Proprietorship
Seat: 6034 Helvécia, Gazdasági dűlő 73., Hungary
Registration number: 61798179
Tax number: 91730424-1-23

Inquiries:
• General customer support: [email protected]
• Legal inquiries: [email protected]
• Data protection (GDPR): [email protected]
• Billing: [email protected]

Official Portals:
• Home: https://preds.hu
• Privacy Policy: https://preds.hu/privacy
• Terms of Service: https://preds.hu/terms
• API Documentation: https://preds.hu/docs

By completing registration or purchasing services, the User confirms that they have read, understood, and agreed to these Terms and the Privacy Policy, and accepts the probabilistic nature and limitations of AI detection.

Effective Date:
These amended Terms are published on September 23, 2026 at 22:00 (Europe/Budapest). The revised subscription quotas and the Essential price change described in Section 15.3 apply to existing affected subscribers from October 24, 2026, subject to the paid-cycle protection in Section 15.4. New subscriptions created after publication use the revised plans, quotas and prices from the time of purchase.

15.1 Change of Accounting Unit (Characters to Words):
Effective September 11, 2026, the billing unit transitioned from character-based to word-based accounting: 1 credit equals 1,000 words instead of the former 10,000 characters, reflecting actual LLM computation overhead.

15.2 Completion of the September 11 Accounting Transition:
The earlier character-to-word balance adjustments were completed under the terms applicable at that time. The legal nature and non-expiring status of previously purchased one-time credits are not changed by the October 24 subscription plan revision.

15.3 Revised Subscription Quotas and Essential Price:
The monthly subscription quotas, and the Essential monthly price, are revised as follows:
• Essential: 600 credits/month → 250 credits/month; monthly price 3,000 HUF → 4,000 HUF
• Pro 6x: 4,000 credits/month → 1,500 credits/month
• Pro 20x (formerly Max): 16,000 credits/month → 5,000 credits/month

New subscriptions created after September 23, 2026 at 22:00 (Europe/Budapest) use the new quotas and prices immediately. Users who already had an active Essential, Pro, or Max subscription at that time move to the new quotas, and Essential subscribers to the new monthly price, from October 24, 2026, subject to Section 15.4.

15.4 Existing Subscribers, Paid Cycles and Plan Renaming:
Any billing cycle that began before October 24, 2026 and was already paid remains entitled to the quota applicable when that cycle began; the quota is not reduced mid-cycle. A cycle beginning on or after October 24, 2026 uses the new quota; for Essential, the 4,000 HUF monthly price also applies from the first such renewal. Annual subscriptions are changed no earlier than the renewal following the already-paid annual term.

Existing Pro subscriptions continue under the name Pro 6x. Existing Max subscriptions continue under the name Pro 20x. These renames do not by themselves create a new subscription, interrupt the existing subscription, or require a new payment authorization.

15.5 Notice and Termination Rights:
Existing subscribers affected adversely by the quota or Essential price change must be informed at least 30 days before the change is applied, by email and through the Service interface, including the old and new quota, the old and new Essential price where applicable, the effective date, the reason for the change, and any applicable statutory termination rights.

This Section 16 governs institutional, academic, and enterprise accounts.

16.1 Definitions:
• Organization: The legal entity (enterprise, school, university) establishing a workspace.
• Organization Account: A member account tied to the organization pool.
• Administrator: Appointed manager managing members, limits, and SSO settings.
• Identity Provider (IdP): SAML 2.0 system (Microsoft Entra ID, Okta, Google Workspace).

16.2 Institutional Responsibility:
• The Organization warrants it holds a lawful legal basis under GDPR to submit texts (including student coursework or employee documents) for detection.
• The Organization agrees to indemnify the Service Provider against third-party claims arising from workspace content.

16.3 Administrator Access & Content Visibility:
• Administrators see member names, emails, roles, quotas, and audit logs.
• Content Access: Access to view member submitted texts is disabled by default and can only be enabled by explicit administrator setting.

16.4 Enterprise SAML 2.0 SSO:
• Preds supports SAML 2.0 identity federation.
• The Service stores the NameID assertion and links it to a pre-provisioned membership for sign-in. The value can itself identify the member depending on IdP configuration. No other IdP member attributes are requested. Revoking access blocks sign-in but does not automatically erase the stored mapping. No auto-provisioning occurs without prior assignment.
• In case of IdP lockouts, an emergency recovery flow is available upon verified request.

16.5 Append-Only Audit Log:
Workspaces maintain an immutable, exportable audit trail of administrative actions.

16.6 Data Processing Addendum (GDPR Article 28):
For texts analyzed in Organization Workspaces, the Organization acts as Data Controller and the Service Provider acts as Data Processor pursuant to Annex 2 below.

ANNEX 2 – Data Processing Addendum (GDPR Article 28)
1. Subject Matter & Scope: Processing submitted documents solely to perform AI detection and OCR on behalf of the Organization for the duration of the workspace.
2. Documented Instructions: Processing occurs strictly pursuant to documented instructions in these Terms and workspace configurations.
3. Confidentiality: All personnel handling data are subject to binding confidentiality agreements.
4. Security: Industry-standard technical and organizational security controls (GDPR Art. 32).
5. Subprocessors: Authorized subprocessors listed in the Privacy Policy. 14 days advance notice for additions.
6. Data Subject Rights: Provider assists the Organization in fulfilling GDPR rights requests.
7. Breach Notification: Provider notifies the Organization without undue delay upon becoming aware of a personal data breach.
8. Data Deletion: Workspace data is exported or permanently deleted within 90 days of termination.