As of July 27, 2026
Welcome to V‑IZ! The terms “we”, “us” and “our” refer to V‑IZ. V‑IZ operates this website (v-iz.de), the associated web application (v-iz.de/app/) and a mobile app for iOS and Android (collectively, the "Services"), including all related information, content, features, tools and products. A large part of the services is free and can be used without an account. Only Premium and the video courses are chargeable. V‑IZ uses various technical interfaces to third-party providers (in particular Stripe for payments and subscriptions on the website, RevenueCat for managing subscriptions in the mobile app and Supabase for account and data management), which enables us to provide you with the services fully and automatically.
The following terms and conditions (these “General Terms and Conditions” or “Terms”) govern the contractual relationship between V‑IZ and you as a user.
DEFINITIONS AND RANKING
For better understanding, the following definitions apply:
(a) “Digital Content” is data created and provided in digital form (in particular the video lessons, the course schedule and the digital Hueber activation codes).
(b) “Digital Services” are services that enable the creation, processing or storage of data in digital form or access to it (in particular account access, cloud-based AI analyses and exam simulations).
(c) “Digital book codes” are the activation codes for “Schritte plus Neu” provided by email. The corresponding licence is linked to your Hueber account only after redemption.
(d) “Subscription” is a recurring service contract that automatically renews after the paid period until you cancel it.
In the event of a conflict, the following order of precedence applies: (1) these general terms and conditions, (2) product or function-related special conditions (e.g. on the product page), (3) general service descriptions. Data protection information exclusively regulates data processing.
These General Terms and Conditions become part of the contract when you actively agree to them in the ordering process or when using the app. You can view, download and print these Terms and Conditions at any time at v-iz.de/en/legal/agb/. Our Privacy Policy also applies.
Section 1: Access, Account and Security
1.1 Legal capacity: By agreeing to these Terms and Conditions, you represent that you are at least 18 years old or, if you are a minor, that you have the express consent of your legal guardian to use the Services.
1.1a Use without an account: You can use the free part of the services without an account and without registering. Your learning progress is only saved locally in your browser. You only need an account if you want to book Premium or a video course or use your progress on multiple devices.
1.2 Account obligations and automation: For paid services and for synchronization across multiple devices, you need a user account. You undertake to provide truthful information (in particular a valid email address). Since we process registration and activation via automated technical services (password-based email login, possibly with a one-time password for initial access after order completion; app store contract processing), a correct email address is technically essential for contract fulfillment.
1.3 Prohibition of account sharing (single user license): Access is strictly personal. Passing on access data to third parties is prohibited.
1.4 Blocking procedure (security review): If we suspect misuse (e.g. account sharing), we may temporarily block access. For this purpose, we evaluate system logs (e.g. timestamps, access logs and device ID hashes), which provide relevant, verifiable evidence for our decision. As part of the security review, you may respond to the suspicion and provide appropriate evidence. If a violation is confirmed, serious or repeated violations may result in a permanent block.
Section 2: Our Products & System requirements
2.1 AI disclaimer: Our app uses artificial intelligence (AI). AI-generated content may contain errors (“hallucinations”) and is intended for training purposes only. It does not replace instruction from a qualified language teacher.
2.2 Hardware access: For the AI voice trainer, our web application and our mobile app require access to your microphone (in the mobile app for Premium functions in addition to the camera/photo gallery for photo corrections). Before the first access, the browser or operating system (iOS / Android) asks for your express permission via the respective system dialog. You can revoke or re-grant this permission at any time in the browser or device settings. Refusal will result in individual functions not being usable or only being usable to a limited extent; the remaining functions (videos, writing trainers, quizzes) remain available.
2.3 No guarantee of success: We do not guarantee success in examinations with official bodies (e.g. TELC, Goethe-Institut, ÖSD).
2.4 System manipulation: The functionality of the services (in particular exam simulations and AI trainers) is not guaranteed if you use them via manipulated browser environments or via devices with a manipulated operating system (e.g. "jailbreak", "rooting"). We reserve the right to limit the service in such environments for security reasons.
Section 3: Conclusion of Contract
3.1 Orders via the website (v-iz.de): The contract is concluded with our confirmation by email or with the activation of your access. During the ordering process, you choose whether you want to take out a Subscription with automatic extension or a One-time purchase for 12 months. Only with a subscription do you grant a recurring payment mandate.
3.1a Right of withdrawal: You may withdraw from the contract within 14 days of its conclusion. For course access and Premium, we refund the full amount; we voluntarily waive compensation for the period during which you have already used the service (Section 357a(2) BGB). The only exception is the digital book codes: before completing the order, we obtain your express consent to begin performance immediately and your acknowledgement that you thereby lose your right of withdrawal for the codes. We then confirm this declaration in the order confirmation (Section 356(5) BGB, Section 312f BGB). Details are provided in our Withdrawal policy.
3.2 In-app purchases (Apple App Store / Google Play Store): If you purchase additional functions or subscriptions within our mobile app via the Apple App Store or the Google Play Store, the contract is concluded directly with the respective app store operator (Apple Distribution International Limited or Google Commerce Limited). Their purchasing and subscription conditions also apply.
Section 4: Prices and Payment Terms
4.1 Prices: All prices quoted include the applicable statutory VAT. For in-app purchases, the app store price matrices apply in your local currency.
4.2 Payment method website (v-iz.de): For orders via our website we accept credit card (Visa, Mastercard, American Express), Apple Pay and Google Pay. Payment is processed via our payment service provider Stripe (Stripe Payments Europe Limited, Ireland). The payment methods available in the respective ordering process will be transparently displayed to you before the order is completed.
4.3 Payment methods in-app (Apple App Store / Google Play Store): For in-app purchases, only the payment methods that you have stored in your Apple ID or your Google account apply. Billing takes place directly via the respective app store operator.
4.4 Billing (website): When you complete the order, Stripe charges the amount to your selected payment method (Section 312j(3) BGB, “order with obligation to pay”). For a subscription, the amount is charged again at the beginning of each new period until you cancel. A one-time purchase is charged only once.
4.5 Prices of paid services (including VAT):
- Premium as a subscription: 12,99 € per month.
- Premium as a one-time purchase: 89,99 € one-time access for 12 months.
- Video course as a subscription per level (A1, A2 or B1): 49,99 € per month. The first payment is also 49,99 € and consists of 46,00 € for the two book codes and 3,99 € for the first month of course access. From the 31st day, 49,99 € will be charged per month until you cancel.
- Video course as a one-time purchase per level for 12 months access: 195,99 € (149,99 € video course + 46,00 € for the two digital book codes).
You can see the breakdown in the ordering process and on your receipt.
4.6 Previous complete package A1 to B1: We no longer offer the complete package for all three levels. For contracts concluded earlier, the terms agreed at the time of purchase remain in force (see Section 5.1.1a-1).
Section 4b: Textbook and Provision
4b.1 What you get: The video course includes the textbook "Schritte plus Neu" (Hueber Publisher) with two volumes per level. You will receive two digital activation codes via email, one for the course book and one for the workbook. There is no choice between different delivery methods; the codes are always included.
4b.2 Digital provision: There is no choice between delivery methods. The codes will be provided via email.
4b.3 Provision time: We send the codes by email immediately after the order has been completed, worldwide. In rare cases, automatic security checks to prevent fraud can take up to 24 hours. Details can be found on our Provision and delivery page.
4b.4 Redemption and duration: Redeem the codes in your free Hueber account on hueber.edupool.de. Only after redemption will the license be bound to your Hueber account; it remains there permanently, even if your V‑IZ access ends later.
4b.5 Fixed book prices: The volumes are price-controlled textbooks in accordance with the German Book Price Fixing Act (BuchPrG). The legally binding publishing price is currently 23,00 € per volume, i.e. 46,00 € per level. This amount is shown separately in the price (see section 4.5).
4b.6 Right of withdrawal: Your right of withdrawal for a book code expires as soon as we have delivered it to you (Section 356(5) BGB), regardless of whether you redeem it. This requires that, during checkout, you expressly request performance to begin before the withdrawal period expires and acknowledge that you thereby lose your right of withdrawal for the codes. We then confirm this declaration in text form. If you subsequently withdraw from the course portion, you retain the codes and any Hueber licences redeemed from them; the value of the delivered codes (46,00 €) is not refunded. Your right of withdrawal for course access itself remains in effect for the full 14 days. Full details are provided in our Withdrawal policy.
Section 5: Free Use, Subscriptions, One-Time Purchase & Refunds
5.0 Free use: All trainers, the vocabulary trainer, the grammar, the pronunciation and the “Life in Germany” test are free. There is also a free portion of AI exercises and an exam simulation every day. You don't need an account for this part, there are no costs and nothing will be debited. We may change the scope of the free offer in the future; Services that have already been paid for remain unaffected.
5.1 Paid services: There is a charge for Premium (higher daily AI limits) and the Video course per level (A1, A2 or B1). You can book both as Subscription or as One-time purchase for 12 months. The prices are in section 4.5.
5.1.1 Subscription term and cancellation: A subscription is an ongoing contract with no minimum term. At the end of each paid period, it automatically renews for the same period until you cancel. You may cancel at any time; cancellation takes effect at the end of the period already paid for, and your access remains valid until then. Use our cancellation button under Section 312k BGB: v-iz.de/app/kuendigen. We will confirm your cancellation by email or on another durable medium.
5.1.1a One-time purchase: A one-time purchase runs for 12 months and then ends automatically. It will not be renewed, no further charges will be made and you do not have to cancel it.
5.1.1a-1 Previous complete package A1 to B1: We no longer offer the complete package for all three levels. For previously concluded contracts, the terms agreed at the time of purchase continue to apply: You will receive a separate activation code for each level and you will unlock the levels one after the other whenever you are ready. The 12 months of access run for each level from the activation of this level, not from purchase. The package does not renew automatically and does not need to be canceled.
5.1.1b Additional level: If you would like another level (e.g. after A1 also A2) or new access after expiry, book this separately at the then valid price. The book codes you have already received and your learning progress will be retained. It is possible to use several levels in parallel.
5.1.2 Means of payment and invoice: You will receive your invoice by email. You manage your payment methods in the respective payment service or app store.
5.1.3 Price changes: For a one-off purchase that has already been completed, the price agreed at the time of purchase remains unchanged. If we change the price of a current subscription, we will inform you in advance in text form. You can then cancel until the change takes effect. If you do not object or cancel, the new price will apply from the next billing period.
5.2 Subscriptions in the mobile app (Apple App Store / Google Play Store): Subscriptions can also be taken out directly from the respective app store via our mobile app. These subscriptions are processed exclusively via the App Store.
- Term and extension: These subscriptions are taken out with the term selected in the App Store and are automatically extended by the original term unless you cancel them at least 24 hours before the end of the current period.
- Administration and termination: The management of your subscription (cancellation, payment methods, extensions) is carried out exclusively via the subscription management of the respective app store (settings of your Apple or Google account). V‑IZ technically does not have access to these processes and cannot cancel or adjust these subscriptions for you.
- Refunds: We cannot technically issue refunds for in-app purchases directly. Please submit refund requests directly to Apple or Google.
5.3 Textbook (included in the video course): The video course includes “Schritte plus Neu”, with two volumes for the selected level (e.g. A1.1 and A1.2). You receive two digital activation codes by email (see Section 4b). The licences are linked to your Hueber account only after you redeem the codes and remain there even after your V‑IZ access expires. For information on provision, fixed book prices and withdrawal, see Section 4b above and our Withdrawal policy.
5.4 Chargebacks: In the case of return debits that, according to our reasonable examination, are not justified by an actual defect in the service, we are entitled to temporarily block the account until the claim has been clarified. You have the right to present your point of view in text form; We will examine your statement within a reasonable period of time. If the chargeback is justified (e.g. due to poor performance for which we are responsible), we will immediately lift the block and refund any amounts that have been overpaid.
5.5 Right of withdrawal and refund: Consumers have a statutory right to withdraw within 14 days of concluding the contract. Because we provide digital products and services only, the period begins when the contract is concluded and there are no physical returns. If you withdraw within the period, we refund the course portion or Premium in full.
Our voluntary commitment is to be distinguished from this: According to the law, we are allowed to withhold a proportionate amount for the time already used (§ 357a Paragraph 2 BGB). We voluntarily waive this. This promise is in addition to your statutory right of withdrawal and does not limit it.
The right of withdrawal for digital book codes expires once they have been delivered (Section 356(5) BGB; see Section 4b). After 14 days, we do not issue refunds, but you may cancel an active subscription at any time in accordance with Section 5.1.1. The easiest way to exercise your right of withdrawal is through our withdrawal button under Section 356a BGB: v-iz.de/app/widerruf-ausueben. Full details are provided in our separate Withdrawal policy.
Section 6: Intellectual Property
6.1 Rights of use: You receive a simple, non-transferable right of use for personal, non-commercial use of the content provided for the duration of the contract. Screen recordings, recordings and the reproduction or distribution of content to third parties are prohibited.
6.2 Prohibition of circumvention: Circumvention of technical protective measures (DRM, access restrictions, authentication) is prohibited and may result in the account being blocked immediately.
Section 7: Technical Infrastructure
We use various service providers to perform the contract, in particular Stripe (website payments and subscriptions), Supabase (database, authentication and backend), RevenueCat (management of mobile-app subscriptions), Resend (transactional emails such as order confirmations, registration links and invoices), Netlify (website hosting), Zapier (automation of internal processes) and Google Vertex AI (Gemini model family) for speech and text analysis in our AI trainers. AI processing takes place in Google Cloud’s EU multi-region. Further details on data processing and international transfers are provided in our Privacy Policy.
Section 8: Third Party Links
Our Services may contain links to external websites for which third parties are responsible. We have no influence on the content of these websites; liability for this is excluded.
Section 9: Relationship to Stripe
Stripe Payments Europe Limited (Ireland) handles the payments and recurring debits for subscriptions on the website for us. Stripe is not a contractual partner for the services offered by V‑IZ; all contractual relationships via v-iz.de exist exclusively between you and V‑IZ. The payment processing itself is also subject to the terms of use of Stripe.
Section 10: Privacy Policy
Your personal data will be processed in accordance with our Privacy Policy.
Section 11: Community Guidelines
Rules of respectful interaction apply in our community areas (e.g. forum, Discord group, comment functions). In particular, the following are prohibited:
- Hate speech, discrimination, insults to other users or employees;
- Racist, sexist, extremist or hateful content;
- Spam, phishing, advertising other services;
- Publishing personal data of third parties without their consent;
- Dissemination of third party copyrighted materials.
In the event of violations, we provide the following sanctions depending on the severity: (1) notice/warning, (2) temporary exclusion from the community areas, (3) permanent blocking of the account in the case of repeated or serious violations. If you are permanently blocked due to a violation of these guidelines, you will no longer be entitled to a refund of any amounts already paid.
Section 12: Availability
We strive to ensure the highest possible availability of the services and aim for an availability of at least 95% on an annual average. This excludes:
- planned maintenance windows (if possible outside normal usage times);
- Third party outages (hosting, payment service providers, AI APIs) for which we are not responsible;
- force majeure events;
- Impairments on the user's side (e.g. internet connection, device).
100% availability is not guaranteed. Short-term impairments do not constitute a claim for reimbursement.
Section 13: Prohibited Uses
In particular, the following are prohibited:
- Reverse-engineering, decompiling or disassembling the App or Platform;
- Crawling, scraping or automated reading of our content;
- Using bots, scripts or other automated tools not expressly intended by us;
- Account sharing or passing on access data to third parties;
- Circumvention of technical access or protection measures;
- Downloading, reproducing or distributing any content outside of the intended mechanisms;
- Use the Services for unlawful purposes.
In the event of violations, we reserve the right to take measures in accordance with Section 14.
Section 14: Termination
14.1 Termination by you: A subscription is a continuing obligation and can be canceled at any time. To do this, use the cancellation button according to § 312k BGB under v-iz.de/app/kuendigen (see section 5.1.1). A one-off purchase ends automatically after 12 months and does not need to be canceled. Subscriptions that you have taken out in the mobile app can be canceled directly in the respective app store in accordance with Section 5.2. The book codes you have already received and the Hueber licenses redeemed from them are not affected by termination.
14.2 Extraordinary termination / blocking by V‑IZ: We can terminate a contract for good cause or block access. Important reasons include, in particular, significant or repeated violations of these Terms and Conditions (e.g. account sharing, violation of community guidelines, prohibited uses in accordance with Section 13). Before a permanent ban, you will receive a warning and an opportunity to comment, except in the case of particularly serious violations or imminent danger.
14.3 Consequences of termination: In the event of an extraordinary termination for which you are responsible (in particular due to a violation of these General Terms and Conditions), you will no longer be entitled to a refund of amounts already paid. If we are responsible for the termination, your legal claims remain unaffected.
14.4 Extraordinary termination by you: Your right to extraordinary termination for good cause remains unaffected.
Section 15: Statutory liability for defects (warranty)
Statutory liability for defects (warranty) applies to the digital products and services provided via our website. There is expressly no guarantee that you will pass official exams (e.g. TELC, Goethe-Institut, ÖSD) through the use of our services. The use of the exercise tools is at your own risk.
Section 16: Limitation of Liability
16.1 Unlimited liability: We have unlimited liability for intent, gross negligence, injury to life, body or health and in accordance with the Product Liability Act.
16.2 Cardinal obligations: In the case of slight negligence, we are only liable if essential contractual obligations (cardinal obligations) are breached. Liability is limited to the foreseeable damage that is typical for the contract.
16.3 Exclusion: To the extent permitted by law, any further liability is excluded.
Section 17: Compensation
You release V‑IZ from legitimate third-party claims that arise from your culpable violation of these General Terms and Conditions or applicable law. We will notify you immediately of any such claims.
Section 18: Severability
Should individual provisions of these General Terms and Conditions be or become ineffective in whole or in part, the effectiveness of the remaining provisions remains unaffected. The statutory regulation applies instead of the invalid provision.
Section 19: Entire Agreement
These Terms, together with the withdrawal policy, the Privacy Policy and any product-specific special terms, govern the entire contractual relationship between you and V‑IZ. There are no verbal side agreements.
Section 20: Assignment
Any assignment of your rights and obligations under this contract to third parties requires our prior written consent. V‑IZ may transfer rights and obligations under this Agreement to a legal successor as part of a business transfer; In this case, your extraordinary right of termination remains unaffected.
Section 21: Governing Law and Venue
German law applies, excluding the UN Convention on Contracts for the International Sale of Goods.
For consumers: The statutory places of jurisdiction apply. Mandatory consumer protection regulations in your country of habitual residence within the EU remain unaffected (Art. 6 Rome I Regulation).
For merchants, legal entities under public law or special funds under public law: The exclusive place of jurisdiction for all disputes arising from this contract is Heilbronn.
Section 22: Changes to Terms
22.1 Significant changes: Significant changes to these General Terms and Conditions, in particular those that shift the balance of the contract to your detriment (e.g. noticeable price increases, reduction in the scope of services), require your express consent.
22.2 Other changes: Other changes, particularly those that are clarifying or required for legal, technical or regulatory reasons, will be communicated to you in text form (e.g. by email) at least 30 days before they come into force. You can object to the changes in text form until they come into force. In the event of an objection, we can terminate the contract at the time it comes into force if continuation without the change is unreasonable for us. Your legal rights remain unaffected.
22.3 Note in the change notice: We will inform you separately about your right to object and the consequences in the change notification.
Section 23: Contact Information
V‑IZ Video-Integrationszentrum
Owner: Fuat Karacocuk
S3 2A
68161 Mannheim
Germany
Telephone: 07131 8882719
WhatsApp: 01523 2756171
Email: info@v-iz.de
Section 24: Dispute Resolution
We are neither willing nor obliged to take part in dispute resolution proceedings before a consumer arbitration board.