Terms of Use and End User Licence Agreement

These Terms of Use and this End User Licence Agreement (the "Terms") form a binding agreement between you ("you", "the user") and

Maximilian Skibinski
Wladimir-Komarow-Straße 41
15517 Fürstenwalde/Spree
Germany
E-mail: support@byokey.app

("we", "us", "the developer") concerning the ByoKey app for iPhone and iPad ("the App") and the website https://byokey.app ("the Website").

This agreement is with us, not with Apple. Apple Inc. is not a party to it. Section 22 contains the provisions that apply to Apple's role.

You accept these Terms by installing or using the App. If you do not accept them, do not use the App and delete it from your device.

ByoKey is a program built on the "bring your own key" principle. It provides an interface to programming interfaces operated by third parties. It contains no AI model, no computing capacity and no credit of any kind.

To use it you need your own account and your own API key with a provider of your choice. The App sends your requests directly from your device to that provider and displays the response.

What we provide: the software. What we do not provide: the AI service, its availability, its output, its prices or its content rules. Those are the provider's business, on the basis of your contract with it.

The App is free of charge, contains no in-app purchases, no advertising, and requires no account with us.

You may use the App only if you have reached the minimum age stated in the App Store age rating, and are old enough under the law applicable to you to enter into a binding contract and to consent to the transmission of data to a provider. In Germany and in several other Member States of the Union that age is 16 years.

If you are younger, you may use the App only with the consent of a parent or legal guardian. That person then also accepts these Terms and bears responsibility for the API key used and for the costs it incurs.

You may not use the App if doing so is prohibited for you under applicable law, or if a provider has excluded you from its service.

We grant you a limited, non-exclusive, non-transferable and revocable right to install and use the App for your own private or business purposes on Apple devices that you own or control, in accordance with the Usage Rules set out in Apple's App Store terms — including the provisions on Family Sharing and Volume Purchasing.

You may not:

• reproduce, distribute, rent, lease, lend, sell or sublicense the App, or make

it available to third parties, except where Apple's Usage Rules expressly permit it;

• reverse engineer, decompile or disassemble the App, or otherwise attempt to

obtain its source code, except to the extent mandatory law expressly permits this notwithstanding this restriction (sections 69d and 69e of the German Copyright Act, UrhG);

• remove, obscure or alter any copyright, trademark or attribution notices;
• modify the App or create derivative works of it;
• use the App to develop a competing product or to circumvent its security

mechanisms (section 8).

All rights not expressly granted remain with us. The App, together with its name, its icon, its design, its texts and its source code, is protected by copyright.

1. You obtain the API key yourself, on the basis of your own contract with the

provider concerned. Instead of entering a key, you can use "Connect with OpenRouter" in the App: you sign in to OpenRouter or create an account there, and OpenRouter creates a key in your account, which the App stores like a key you entered. Your contract remains the one with OpenRouter. Free models there are subject to OpenRouter's limits and to the data policies you allow in your OpenRouter account. That contract exists between you and the provider. We are not a party to it, we are the agent of neither side, and we are not a reseller.

1. You are responsible for your key. Keep it secret. Set a spending limit at

the provider. Revoke it immediately if you suspect it has become known.

1. You bear all costs incurred at a provider through the use of your key —

whether through your own use of the App, through use by another person with access to your device, or through an error, a wrong setting or a defect of the App. See also section 15.

1. You must comply with the provider's terms, including its usage policies,

its content rules and its export restrictions. Some providers prohibit content or uses that our App is technically capable of transmitting. Where the two sets of rules differ, the stricter one applies to you.

1. Providers may change prices, discontinue models, change interfaces, restrict

access or cease operation. We have no influence over this, we are not notified of it in advance, and we owe no compensation for it.

1. The App stores your key in the iOS Keychain on your device and transmits it

solely to the provider it belongs to, and only after your consent. It never reaches us, because we operate no server that could receive it.

A server of your own. If you connect a server of your own under "Custom server", you choose its address and you are responsible for that server. For the purposes of these Terms, whoever operates it takes the place of the provider. The App accepts an http:// address only for a local-network address (a private IP address, a name ending in .local or a name without a dot); that connection is unencrypted.

The App calculates the tokens and costs of your requests locally — from the cost the provider reports for a request, from the price information the provider publishes, or from prices you entered yourself.

This calculation is an estimate and is not binding. It may differ from the actual billing, in particular because

• providers count tokens according to their own rules, which may differ from our

estimate;

• prices change without notice, and cached price information can become

outdated;

• costs that do not accrue per token — per request, per image, per second of

audio — can only be estimated approximately; Prices you enter yourself are only as accurate as your entry; check them against the provider's price list.

• not every provider publishes prices or reports usage. Where that

information is missing, the App prefers to show no figure rather than a wrong one. That is a limitation, and we name it instead of concealing it;

• retries, failed requests and requests cancelled midway may nevertheless be

charged by the provider.

The figure in your provider account is the one that counts. Rely on the provider's spending limits and budget alerts, not on the display in the App. We accept no liability for costs arising from a divergence between the estimate and the actual billing.

You retain all rights in the content you enter, attach or generate. We acquire no rights in it and — since we operate no server — hold no copy of it.

You warrant that you hold the necessary rights and permissions for everything you enter or attach, and that transmitting it to the provider you have chosen infringes neither the rights of third parties nor any statutory duty. This applies in particular to

• documents, source code and images belonging to third parties;
• personal data of other people — attaching an unredacted document containing

third parties' personal data can make you the controller of that transmission, including a transmission to a country outside the Union;

• trade and business secrets, and information subject to a professional duty of

confidentiality (medical, legal and comparable duties of confidentiality do not lapse because there is a machine at the other end);

• export-controlled content.

Rights in generated content. Whether and to what extent you may use a model's output, and who holds rights in it, is determined by the provider's terms and by the law applicable to you. We make no representation about this.

We have zero tolerance for objectionable content and abusive behaviour. By using the App you undertake not to use it to generate, transmit, store, export or distribute content that

• depicts, describes or facilitates the sexual abuse or sexual exploitation of

children, in any form and by any technique;

• constitutes any other sexualised depiction of minors, real or generated;
• threatens or glorifies violence, or contains instructions for acts of

violence, weapons, explosives or attacks;

• incites hatred against persons or groups on grounds of origin, ethnicity,

colour, religion, sex, sexual orientation, gender identity or disability, or degrades such persons;

• harasses, stalks, insults or threatens a specific person, or discloses their

private data (doxing);

• promotes terrorism or extremist violence, or supports an organisation

classified as terrorist;

• serves the preparation or commission of criminal offences, including fraud,

identity theft, the development of malicious software, unauthorised access to systems, and the manufacture of drugs, weapons or explosives;

• infringes the rights of third parties, in particular copyright, trademark and

personality rights;

• serves to impersonate another person or entity;
• serves to generate false information intended to be passed off as genuine, in

particular concerning elections, public health or emergencies.

You further undertake

• not to attempt to circumvent, disable or manipulate the App's security

mechanisms — the content filter, the safety instruction, the consent screens or the fencing of the HTML preview;

• not to use the App to test other people's or other providers' systems without

their permission;

• not to automate the App or use it in a way that overloads a provider's

interface or breaches its usage limits.

Consequences. ByoKey has no user accounts and shares nothing between users; we therefore cannot suspend an account. What we can do, and will do:

• The App blocks detected violations locally and refuses to transmit.
• You can report any answer and block any model from further use

(section 9).

• We review reports that reach us, and we report to the competent authorities

any violation we are legally obliged to report — in particular depictions of the sexual abuse of children.

• We may revoke your licence under these Terms (section 20) and, so far as

technically possible, take steps to prevent further use.

• Your provider may suspend or terminate your account with it independently of

this.

A limit we state openly. The content filter reads text, in German and English. It does not read text in other languages, and it cannot assess the content of an image — neither an image you attach nor an image a model generates. It is a safeguard, not a guarantee. Responsibility for what you send, and for what you do with what you receive, remains with you.

Reporting. Any answer can be reported from its context menu. The report is stored in a local log on your device and can additionally be sent to us by e-mail. We review reports that reach us and respond to them within 24 hours on business days.

Blocking. You can block any model; the App will then no longer use it. This takes effect immediately and without any action on our part.

Contact for reports and complaints: support@byokey.app

The output of generative models consists of statistical predictions. It can be factually wrong, outdated, biased, objectionable or entirely fabricated — and it can be delivered with complete confidence and still be wrong.

Check every result before you rely on it.

The App provides no medical, legal, tax, financial, psychological or other professional advice and is no substitute for such advice. Do not use it to diagnose or treat a condition, to assess a legal position or to make a financial decision. Consult a qualified person.

In an emergency, contact your country's emergency services. The App displays local emergency contacts when it detects an acute personal crisis; it is not, however, a crisis service, it is not monitored by any human being, and it must not be relied on as one.

Source code. Program code generated by a model is unreviewed. It may contain security vulnerabilities, licence violations or data-destroying commands, or it may simply not work. Read it, understand it and test it in an isolated environment before you run it. You alone are responsible for what you run.

HTML preview. The preview renders HTML, CSS and JavaScript exclusively from local files and refuses requests to external addresses. PHP and other server-side languages are not executed and cannot be — the preview displays such files, it does not run them. The preview is not a security review: content that looks harmless there may behave differently in a real browser or on a real server.

• Attached and generated images are not checked by the content filter

(section 8).

• Whether a model accepts an image as input is decided by the provider, not by

the App. The App warns you before sending as far as it can detect this; a provider may nevertheless reject the request and nevertheless charge for it.

• Saving a generated image to your photo library is your act; what you do with

it afterwards is your responsibility, including with regard to any rights of third parties.

Voice mode runs either on your device — the default, which works with any chat model and transmits nothing — or via a provider, which requires a separate consent, a voice-capable model and your API key, and incurs costs at that provider.

Speech recognition and speech synthesis are provided by iOS. Their quality, the available languages and the voices on offer are determined by Apple and by your device settings, not by us. Some voices must first be downloaded in the iOS settings.

Do not use voice mode in situations that require your attention, in particular not while driving a vehicle or operating machinery.

The App runs on your device. We operate no service that could go down, but neither do we promise that the App will be available, will run without fault, or will remain compatible with future versions of iOS or with future changes to a provider's interface.

We may release updates, change or discontinue features, and end development of the App. There is no obligation to update or to maintain compatibility.

Support is provided by us, not by Apple, at support@byokey.app. We endeavour to reply within 3 business days. This is a voluntary commitment and not an agreed service level.

The App is supplied free of charge. To the extent permitted by law it is supplied as is, without any express or implied warranty of any kind, in particular without any warranty of merchantability, fitness for a particular purpose or non-infringement of third-party rights.

Your statutory rights as a consumer remain unaffected. In particular, our liability for defects in a gratuitous supply is governed by sections 521 and 524 of the German Civil Code (BGB) and is limited to intent and gross negligence; mandatory provisions on digital products remain unaffected to the extent they apply.

In the event of any failure of the App to conform to an applicable warranty, you may notify Apple, and Apple will refund the purchase price of the App, if any, to you. To the maximum extent permitted by applicable law, Apple will have no other warranty obligation whatsoever with respect to the App. Any other claims, losses, liabilities, damages, costs or expenses attributable to any failure to conform to any warranty will be our responsibility and not Apple's.

We are liable without limitation for damage arising from injury to life, body or health, for damage caused intentionally or by gross negligence, under the German Product Liability Act, and to the extent we have given a guarantee or fraudulently concealed a defect.

In the case of ordinary negligence we are liable only for breach of a material contractual obligation — an obligation whose fulfilment makes the proper performance of this agreement possible in the first place and on whose observance you may regularly rely. In that case liability is limited to the damage typical for this type of contract and foreseeable.

Any further liability is excluded. This applies in particular to:

• costs incurred at a provider, for whatever reason, including through a

defect of the App, an inaccurate cost estimate, an unattended session, a repeated request or a key obtained by a third party;

• the content of model output and any consequence of your acting on it;
• damage caused by running source code generated by a model;
• **a provider's availability, prices, content rules, security and data

handling**;

• loss of data on your device, subject to section 16.

The limitations in this section also apply for the benefit of our employees, representatives and vicarious agents.

Nothing in these Terms limits any liability that cannot be limited under the law applicable to you as a consumer.

All your data resides on your device. We hold no copy and can restore nothing.

The App writes carefully and does its utmost not to lose your work, but no software is free of faults, and a device can be lost, damaged or wiped. Making backups is your responsibility. Use the export function for content that matters to you, and keep your API keys somewhere you will find them again.

Where damage arises from the loss of data, our liability under section 15 is limited to the effort that would have been required for restoration had proper and regular backups been made.

If a third party brings a claim against us on account of content you have entered, attached, generated or distributed, or because you have breached these Terms or infringed the rights of third parties, you shall indemnify us against that claim and against the reasonable costs of legal defence — unless you are not responsible for the breach.

Third-party terms may apply to your use of the App, in particular those of the providers you choose and those of Apple. You must comply with applicable third-party terms. Where they differ from these Terms in respect of that third party's service, the third party's terms prevail for that service.

The App uses the standard encryption provided by iOS (TLS, Keychain) and contains no cryptography of its own.

You represent and warrant that

• you are not located in a country that is subject to a U.S. Government embargo,

or that has been designated by the U.S. Government as a "terrorist supporting" country, and

• you are not listed on any U.S. Government list of prohibited or restricted

parties.

You further undertake to comply with all applicable export and sanctions regulations when using the App and when transmitting content to a provider, including those of the European Union, the Federal Republic of Germany and the United States.

These Terms apply for as long as you have the App installed.

You may terminate at any time by deleting the App from your device. We recommend running *Settings → Delete all data* first.

We may revoke the licence granted in section 4 with immediate effect if you breach these Terms seriously or repeatedly, in particular section 8. On termination you must cease use and delete the App.

Sections 7, 10, 14, 15, 17, 21 and 22 survive termination.

Governing law. The law of the Federal Republic of Germany applies, excluding the UN Convention on Contracts for the International Sale of Goods. If you are a consumer habitually resident in the EEA, the United Kingdom or Switzerland, this choice of law does not deprive you of the protection afforded by the mandatory provisions of the law of your country of residence.

Place of jurisdiction. If you are a merchant, a legal person under public law or a special fund under public law, the exclusive place of jurisdiction is Frankfurt (Oder). For consumers, the statutory rules apply.

Consumer dispute resolution. We are neither obliged nor willing to participate in dispute resolution proceedings before a consumer arbitration board (section 36 of the German Act on Alternative Dispute Resolution in Consumer Matters, VSBG). The European Commission's online dispute resolution platform was discontinued on 20 July 2025; a reference to it is therefore omitted.

Changes to these Terms. We may amend these Terms where a change in the law, in Apple's requirements, in a provider's terms or in the App's functionality requires it. The version in force is available at https://byokey.app/terms and is linked from within the App. We will point out material changes in the App. If you do not accept a change, your remedy is to cease use and delete the App.

Severability. If any provision of these Terms is or becomes invalid, the validity of the remaining provisions is unaffected. The statutory rule takes the place of the invalid provision.

Language. These Terms are available in German, English and Polish at https://byokey.app. The German version prevails; the other language versions are translations provided for convenience. Mandatory consumer protection provisions of your country of residence remain unaffected.

The following provisions apply to Apple Inc. and its subsidiaries in connection with your licence to use the App.

1. Acknowledgement. This agreement is concluded between you and us alone,

and not with Apple, and Apple is not a party to it. We, not Apple, are solely responsible for the App and its content.

1. Scope of licence. The licence granted in section 4 is limited to a

non-transferable licence to use the App on any Apple-branded products that you own or control, and as permitted by the Usage Rules set out in Apple's App Store terms, except that the App may be accessed and used by other accounts associated with you via Family Sharing or volume purchasing.

1. Maintenance and support. We are solely responsible for providing any

maintenance and support services with respect to the App, as specified in these Terms or as required under applicable law. Apple has no obligation whatsoever to furnish any maintenance and support services with respect to the App.

1. Warranty. We are solely responsible for any product warranties, whether

express or implied by law, to the extent not effectively disclaimed. In the event of any failure of the App to conform to an applicable warranty, you may notify Apple, and Apple will refund the purchase price of the App, if any, to you. To the maximum extent permitted by applicable law, Apple will have no other warranty obligation whatsoever with respect to the App. Any other claims, losses, liabilities, damages, costs or expenses attributable to any failure to conform to any warranty will be our sole responsibility.

1. Product claims. We, and not Apple, are responsible for addressing any

claims by you or any third party relating to the App or your possession and use of the App, including (a) product liability claims, (b) any claim that the App fails to conform to any applicable legal or regulatory requirement, and (c) claims arising under consumer protection, privacy or similar legislation.

1. Intellectual property rights. In the event of any third-party claim that

the App or your possession and use of the App infringes that third party's intellectual property rights, we, and not Apple, will be solely responsible for the investigation, defence, settlement and discharge of that claim.

1. Legal compliance. You represent and warrant that you comply with the

requirements set out in section 19 of these Terms.

1. Developer name and address. Any questions, complaints or claims with

respect to the App should be directed to the address given in section 1.

1. Third-party terms of agreement. You must comply with applicable

third-party terms of agreement when using the App (section 18).

1. Third-party beneficiary. You acknowledge and agree that Apple, and

Apple's subsidiaries, are third-party beneficiaries of these Terms, and that, upon your acceptance of these Terms, Apple will have the right (and will be deemed to have accepted the right) to enforce these Terms against you as a third-party beneficiary thereof.

Maximilian Skibinski
Wladimir-Komarow-Straße 41
15517 Fürstenwalde/Spree
Germany
E-mail:  support@byokey.app
Website: https://byokey.app

Privacy Policy: https://byokey.app/privacy