Terms of Service
1. Scope
These Terms of Service (hereinafter "Terms") apply to the use of the web platform roger., accessible at roger.aero and app.roger.aero (hereinafter "Platform"), operated by:
Anton Heuchert & Niklas Röthlingshöfer (GbR)
Regensburgerstraße 21a
85055 Ingolstadt
Germany
Email: crew@roger.aero
By registering for and using the Platform, the user accepts these Terms. Deviating conditions of the user are not recognized unless the operator expressly agrees to their validity in writing.
2. Subject Matter
roger. is a web-based training platform for aviation radio communication. The Platform enables users to practice radiotelephony phrases and improve their skills through AI-powered exercises and feedback.
The Platform serves exclusively for training and practice purposes. It does not replace officially approved training or official examinations. Passing exercises on the Platform does not entitle the user to any official license or certification.
3. Registration and User Account
Full use of the Platform requires registration. Registration is done via email address and password.
The user is obliged to provide truthful information during registration and to keep their access credentials confidential. The user is liable for all activities carried out through their user account.
The user may terminate their account at any time by sending an email to crew@roger.aero and request the deletion of their data.
4. Description of Services
The Platform offers the following services in particular:
- AI-powered exercises for radiotelephony training (BZF I, BZF II, BZF/E, Language Proficiency)
- Voice training with speech input and automated pronunciation assessment
- Vocabulary and theory exercises with various input modes
- Progress tracking and adaptive exercise selection
- Text-to-speech playback of ATC radio calls
The exact scope of features may change as the Platform evolves. The operator reserves the right to modify, expand, or discontinue individual features, provided this is reasonable for the user.
5. Free and Paid Services, Credit
Registration and part of the exercises are free of charge. Services that rely on an AI-assisted assessment are subject to a charge. They are not sold as a subscription but as credit purchased on a one-off basis, in two units:
- Conversation minutes for spoken language training, billed to the second according to actual conversation time.
- Exercise units for the AI assessment of individual answers. One unit corresponds to one assessment; an image description costs five units.
The scope and price of a credit package applicable at any given time are shown during the ordering process and are authoritative there.
Purchased credit does not expire and can be redeemed without a time limit for as long as the Platform is operated and the user account exists. There is no claim to a payout of unused credit; statutory claims remain unaffected, in particular in the event of withdrawal and upon discontinuation of operations under Section 13. Credit is tied to the user account and is not transferable.
The operator is entitled to adjust the ratio between an assessment and the units charged for it if the underlying costs change substantially. Any such adjustment will be announced by email at least 30 days in advance and does not apply to credit already purchased.
6. Conclusion of Contract, Prices and Payment
The presentation of credit packages on the Platform is not a binding offer but an invitation to place an order. By clicking the button labelled "Zahlungspflichtig bestellen" (order with obligation to pay), the user submits a binding offer. The contract is concluded when the operator confirms the order by email or credits the balance.
Before the order is submitted, the user is shown the essential characteristics of the service and the total price. All prices are final prices. Pursuant to Section 19 German VAT Act, no value added tax is charged (small business regulation), and VAT is therefore not shown separately.
Payment is processed by a payment service provider using the payment methods offered there; the provider is shown to you during checkout. Credit is added once payment is confirmed. The operator provides the user with the contract confirmation, including these terms and the withdrawal instructions, in text form.
The language of the contract is German. The operator stores the contract text; the user can access and save these terms on this page at any time.
7. Right of Withdrawal for Consumers
Consumers have the right of withdrawal set out below. A consumer is any natural person who enters into a legal transaction for purposes that are predominantly outside their trade, business or profession.
Withdrawal Instructions
Right of withdrawal. You have the right to withdraw from this contract within fourteen days without giving any reason. The withdrawal period is fourteen days from the day the contract was concluded.
To exercise your right of withdrawal, you must inform us
Anton Heuchert & Niklas Röthlingshöfer (GbR)
Regensburgerstraße 21a
85055 Ingolstadt
Germany
Email: crew@roger.aero
of your decision to withdraw from this contract by an unequivocal statement (e.g. a letter sent by post or an email). You may use the model withdrawal form below, but this is not obligatory. To meet the withdrawal deadline, it is sufficient for you to send your communication concerning the exercise of the right of withdrawal before the withdrawal period has expired.
Effects of withdrawal. If you withdraw from this contract, we shall reimburse to you all payments received from you without undue delay and in any event not later than fourteen days from the day on which we are informed about your decision to withdraw from this contract. We will carry out such reimbursement using the same means of payment as you used for the initial transaction, unless you have expressly agreed otherwise; in any event, you will not incur any fees as a result of such reimbursement.
Compensation for value. If you requested that the service begin during the withdrawal period, you shall pay us an amount which is in proportion to what has been provided until you have communicated to us your withdrawal from this contract, in comparison with the full coverage of the contract. The decisive measure is the share of the credit you have already used.
Early expiry of the right of withdrawal. In the case of a contract for the supply of services, your right of withdrawal expires early if we have fully performed the service and only began performance after you gave your express consent and at the same time acknowledged that you would lose your right of withdrawal upon full performance of the contract. The service is deemed fully performed once the purchased credit has been used up in full.
Model Withdrawal Form
(If you wish to withdraw from the contract, please complete and return this form.)
- To: Anton Heuchert & Niklas Röthlingshöfer (GbR), Regensburgerstraße 21a, 85055 Ingolstadt, Germany, email: crew@roger.aero
- I/We (*) hereby give notice that I/We (*) withdraw from my/our (*) contract of sale of the following goods (*) / for the provision of the following service (*)
- Ordered on (*) / received on (*)
- Name of consumer(s)
- Address of consumer(s)
- Signature of consumer(s) (only if this form is notified on paper)
- Date
- (*) Delete as appropriate.
8. Licence Codes and Use by Organisations
Credit can also be purchased in the form of licence codes, in particular by flight schools and clubs for their members. The purchaser receives a number of codes, each of which can be redeemed once in a user account. Redemption adds the credit contained in the code to the redeeming account; a code cannot be redeemed again.
In these cases the user agreement for the Platform is concluded between the operator and the individual natural person holding the account. The purchaser of the licence codes receives no access to the practice data or assessments of the redeeming users.
The operator may block codes that have not yet been redeemed if the underlying purchase price has not been paid or has not been paid in full, or if payment is reversed. Credit already redeemed remains unaffected to the extent it was lawfully acquired.
9. Usage Rights and Obligations
The operator grants the user a simple, non-transferable, non-sublicensable right to use the Platform for private and professional training purposes.
The user agrees in particular:
- Not to misuse the Platform or grant third parties access to their account.
- Not to perform automated access (bots, scrapers) on the Platform.
- Not to reproduce, distribute, or make publicly available any content of the Platform without the express permission of the operator.
- Not to use the Platform in any way that impairs the operation, security, or integrity of the Platform.
10. Availability
The operator strives for uninterrupted availability of the Platform. No guarantee is given for a specific level of availability.
In particular, maintenance work, updates, or technical issues may lead to temporary restrictions or outages. The operator will carry out maintenance work outside of peak usage hours where possible and will inform the user of planned maintenance windows in a timely manner.
11. Limitation of Liability
The operator has unlimited liability for damages arising from injury to life, body, or health based on an intentional or negligent breach of duty by the operator, as well as for damages based on intent or gross negligence.
In cases of slight negligence, the operator is only liable for breaches of essential contractual obligations (cardinal obligations). In such cases, liability is limited to foreseeable, contract-typical damages.
The Platform serves exclusively for practice purposes. The operator assumes no liability for results in official examinations. The AI-powered assessment and feedback serve as training support and do not constitute a binding performance evaluation.
The AI systems used are narrowly restricted to their task: they compare the user's input against fixed, predefined facts rather than responding freely. Even with this narrow scope and ongoing testing, the operator cannot fully rule out that an AI-assisted assessment is incorrect in an individual case.
The operator takes reasonable precautions against misuse of the AI-assisted features. However, no guarantee can be given that the third-party AI services used are fully protected against manipulation attempts such as prompt injection.
The above limitations of liability also apply in favor of the legal representatives and vicarious agents of the operator.
12. Data Protection
Details on the collection and processing of personal data can be found in the Privacy Policy. The Privacy Policy is an integral part of these Terms.
13. Term, Termination and Discontinuation of Operations
The user relationship runs for an indefinite period and does not create any recurring payment obligation. The user may end it at any time without notice by requesting deletion of their account (Section 3). Unused credit expires when the account is deleted, so the user may wish to check before deletion whether they want to use up their credit.
The operator may terminate the user relationship with 30 days' notice to the end of a month. The right to terminate for cause, in particular in the event of serious breaches of Section 9, remains unaffected.
If the operator discontinues the Platform, it will announce this by email at least 60 days in advance. In that case users will be refunded the share of the price paid that is attributable to unused credit. No refund is owed where the operator terminates for cause for a reason attributable to the user.
14. Amendments to the Terms
The operator reserves the right to amend these Terms with effect for the future. The user will be informed of changes at least 30 days before they take effect via email.
If the user does not object to the amended Terms within 30 days of receiving the notice of change, the amended Terms shall be deemed accepted. The operator will inform the user in the notice of change of their right to object and the significance of the 30-day period.
15. Consumer Dispute Resolution
The operator is neither willing nor obliged to participate in dispute resolution proceedings before a consumer arbitration board.
16. Final Provisions
The laws of the Federal Republic of Germany apply, excluding the UN Convention on Contracts for the International Sale of Goods (CISG).
If the user is a merchant, a legal entity under public law, or a public-law special fund, the exclusive place of jurisdiction for all disputes arising from or in connection with these Terms is the registered office of the operator.
Should individual provisions of these Terms be or become invalid or unenforceable, this shall not affect the validity of the remaining Terms. The invalid or unenforceable provision shall be replaced by a valid and enforceable provision that most closely reflects the economic purpose that the contracting parties pursued with the invalid or unenforceable provision.
Last updated: August 2026