Cordaxis Universal RC Controller
Terms of use
Version of 25 October 2026.
1 Purpose and acceptance
1.1. These terms of use (the "Terms") govern access to and use of Cordaxis Universal RC Controller (the "Program"), a Windows application for controlling radio control models (aircraft, helicopters, drones, cars and boats) from a computer, keeping a flight log and an equipment inventory, and taking part in a user community.
1.2. The Program is a service of Cordaxis ("Cordaxis", "we", "us"). Any communication concerning these Terms may be sent to cordaxis.rc@gmail.com.
1.3. By registering for the Program, you ("you", the "User") accept these Terms in full. If you do not accept them, you may not create an account or use the Program. The processing of personal data is governed by the Privacy Policy, which you declare you have read.
1.4. Personal, recreational use. The Program is offered for the personal, recreational and non-commercial use of a single person. Using it for commercial purposes or within a professional or business activity (for example at a flying school, at a shop or club that charges for its use, in services provided to third parties, or in paid recordings, shows or training) requires a separate commercial licence, which can be requested at cordaxis.rc@gmail.com. This does not prevent a non-profit club or association from using the Clubs feature to organise its members, as long as each of them uses the Program with their own account.
1.5. Civilian use only. The Program, and the code it generates for the Cordlink Unit, are licensed exclusively for civilian use. You may not use them, in whole or in part, for military purposes or any other purpose outside the civilian sphere, in weapons or in systems that carry or launch them, or for any purpose that endangers the life, physical integrity or safety of people. Breaching this clause ends the licence and allows Cordaxis to cancel your account, without prejudice to any other liability that may apply.
2 User account
2.1. Minimum age. To register, you must have reached the age at which the law of your country of residence allows you to consent on your own to the processing of your personal data by online services: fourteen (14) in Spain, under Article 7 of Organic Law 3/2018 on the Protection of Personal Data and the Guarantee of Digital Rights; between thirteen (13) and sixteen (16) in the other Member States of the European Union, according to their national law; thirteen (13) in the United States; and eighteen (18) in India.
2.2. Your date of birth is requested at registration, also when you sign in with a Google or Discord account, solely to verify this requirement. Only the year is retained, as described in the Privacy Policy.
2.3. An account is required to use the Program, including its setup and piloting features. Accordingly, persons who have not reached the minimum age may not use it.
2.4. The minimum age for registration is not the age of majority. Recommendations for minors when piloting are set out in clause 7.
2.5. You undertake to provide accurate information and to keep your password confidential, and you must notify us without delay of any unauthorised access to your account. We may close accounts created with false information.
2.6. Each person may hold only one account.
2.7. Under-18s. Accounts of persons under eighteen (18) cannot receive messages from people they do not know or appear on the map of online pilots. To take out a subscription, a minor needs the consent of a parent or guardian.
3 Community rules and moderation
3.1. The forum, clubs, wall and private messages are intended for discussion of radio control. The following are prohibited:
harassing, threatening or insulting others;
publishing sexual content involving minors, or attempting to contact a minor for that purpose, which will in all cases be reported to the competent authorities;
publishing unlawful content, or content that incites hatred or violence;
sending unsolicited advertising, spam or fraudulent communications;
impersonating another person or a brand;
disclosing the personal data of others without their consent;
linking to malicious software or phishing sites.
3.2. Notices. Anyone, with or without an account, may notify us of content they consider illegal or contrary to these Terms: users from within the Program, and anyone by email to cordaxis.rc@gmail.com, stating where the content is, why they consider it illegal, and their name and email address (except for child sexual abuse, which may be reported anonymously). We will acknowledge receipt and review every notice.
3.3. Automatic hiding. Content reported by three different users is automatically and provisionally hidden until a person at Cordaxis reviews it and decides whether to remove it or show it again.
3.4. Measures and reasons. Depending on the seriousness of the case, we may remove the content, warn the user, restrict their access to the community or close their account. We will inform the affected user, within the Program, of the measure taken, the content concerned, the rule of these Terms or the law that was breached, whether the decision was taken automatically, and how to appeal. The user may respond by writing to cordaxis.rc@gmail.com, and the appeal will be reviewed by a person.
3.5. The foregoing is without prejudice to the user's right to bring the matter before the courts or before an alternative dispute resolution body.
4 Content published by users
4.1. You retain ownership of the texts and images you publish. By publishing them, you grant Cordaxis a nonexclusive, worldwide licence, free of charge, to reproduce, technically adapt (for example, reduce the size of an image), store and make them available to the Program's users, including through a direct link to the file and through the providers that host the service, limited to what is necessary for the community to function and for as long as the content is published. The licence ends when you remove the content, except for the moderation copies described in the Privacy Policy.
4.2. You may delete your posts at any time. So that other users' replies keep their context, an empty entry will remain in place of the deleted message.
4.3. You warrant that you hold the necessary rights to what you publish and, if other people appear in an image, their consent to publish it.
5 Subscription, payments and right of withdrawal
5.1. The Program offers free features and paid features by subscription. The price of each period and the features included are shown before purchase. Prices are adjusted to purchasing power in each country, and the amount payable is the one shown at checkout. In the European Union, the United Kingdom and most countries that price includes taxes; in the United States and Canada sales taxes are calculated from your address and added in the checkout window, before you confirm.
5.2. Payments are processed by Paddle, which acts as the merchant of record for the subscription: you buy from Paddle, which charges you and issues the invoice. In addition to these Terms, Paddle's buyer terms apply to the purchase (paddle.com/legal/checkout-buyer-terms).
5.3. Automatic renewal. The subscription is monthly or yearly, as chosen at purchase, and renews automatically at the end of each period for another period of the same length, at the current price and with the payment method you gave Paddle, until you cancel. The price of each period and how often you are charged are shown before you pay.
5.4. Cancellation. You may cancel the subscription at any time, at no cost and without giving any reason: in the Program, in the «Support» window, with the «Cancel subscription» button, or in Paddle's customer portal, through the «Manage subscription» link in Paddle's emails or at paddle.net. Cancellation takes effect at the end of the period already paid for: until then you keep access and are not charged again. Paddle confirms the cancellation by email.
5.5. Notices before renewal and price changes. For yearly subscriptions, Paddle emails you before each renewal, between 7 and 30 days in advance, in the countries where the law requires it. If Cordaxis changes the price of an ongoing subscription, it will tell you by email at least 30 days before it applies; the new price applies from the next renewal and you may cancel before then at no cost.
5.6. Withdrawal. If you are a consumer in the European Union, the European Economic Area, Switzerland or the United Kingdom, you have fourteen (14) calendar days from purchase to withdraw from the contract without giving any reason. As Paddle is the seller, you withdraw with Paddle, using the withdrawal button in its customer portal (the «Manage subscription» link in your confirmation email, or paddle.net), or by writing to cordaxis.rc@gmail.com, which will process it with Paddle. Paddle makes the refund under its refund policy (paddle.com/legal/refund-policy).
5.7. Donations. Separately, you may make single donations through PayPal, on PayPal's own page. Donations are voluntary, grant access to no feature, create no subscription and do not renew. If a donation is made for the wrong amount, we will refund it at the donor's request.
5.8. Beta. While the Program is in beta, its setup and piloting features are free. Before the beta ends, we will announce within the Program and on our website, at least thirty (30) days in advance, the date and the conditions for continuing to use it. Nobody will pay for anything they have not expressly purchased.
5.9. How the contract is made. The subscription is taken out in these steps: you choose the plan in the Program's "Support" window; Paddle's payment window opens, where you see the final price including taxes and can review and correct your details before confirming; and, when you pay, Paddle emails you the confirmation and the invoice, which serve as your receipt. The subscription is recorded in your account, and these Terms can be consulted at any time from the Program and on the website. The contract can be concluded in Spanish or English.
6 Conformity, updates and support period
6.1. While your subscription is in force, we will keep the Program in working order and supply the updates necessary to maintain its conformity, including security updates, in accordance with Directive (EU) 2019/770 and the national laws transposing it.
6.2. In the event of a lack of conformity, you are entitled to have it remedied and, where that is not possible, to a proportionate reduction of the price or to terminate the contract.
6.3. We will provide support and security updates for a period of five (5) years from the release of each version, by means of updating to the latest version of the Program, in accordance with Regulation (EU) 2024/2847 (the Cyber Resilience Act).
7 Safety warnings when piloting
7.1. The Program is an auxiliary tool and does not replace your radio control transmitter. It runs on a personal computer, which may freeze, run out of battery or lose the connection with the controller at any time. You may therefore use it for piloting only if, throughout the session:
the original transmitter is switched on, bound to the model, and in your hands or within your immediate reach;
the transmitter's trainer function is set up so that releasing the trainer switch returns control of the model to the transmitter;
you have checked on the ground, before starting, that control is regained in this way.
If the Program, the computer or the model behaves abnormally, you must immediately take back control with the transmitter. Any damage resulting from a failure to meet these obligations is attributable to you, without prejudice to clause 8.2.
7.2. The pilot alone is responsible for deciding where to operate, with which model, under what conditions and at what distance from people, animals, vehicles, buildings or power lines. The Program does not know the user's location or surroundings, cannot prevent a manoeuvre and is not a safety system.
7.3. You must comply with the rules that apply where you operate, in particular those governing model aircraft and unmanned aircraft, which in the European Union are laid down in Commission Implementing Regulation (EU) 2019/947, as well as the rules of your club, your municipality and the roads or waters on which you drive or sail. Damage resulting from a failure to comply with those rules is the responsibility of the person piloting.
7.4. Minors are advised to pilot under the supervision of an adult, given the risks posed by the propellers, motors and mass of the models. This recommendation does not alter the minimum age for registration set out in clause 2.
8 Liability
8.1. Cordaxis is liable for damage resulting from a breach of its obligations, as provided by law.
8.2. The limitations of liability in these Terms do not apply where the law does not allow liability to be limited, and in particular to:
death or personal injury;
damage caused intentionally or through gross negligence;
damage caused by defective products.
Nor do they affect the rights that consumer protection law grants you. If any provision of these Terms could be read otherwise, it shall not apply to that extent.
8.3. Except in the cases above, Cordaxis is not liable for damage that was not foreseeable when the contract was made. If you are not a consumer, Cordaxis is also not liable for indirect damage or loss of profit.
8.4. Without prejudice to the conformity obligations in clause 6, the Program is supplied as is. We do not warrant that it is fit for any particular purpose of yours, that it works with every combination of transmitter, receiver, controller or operating system, or that it is free from errors.
8.5. You are liable, in accordance with the law, for the damage you cause to Cordaxis or to third parties through the way you piloted, a breach of the rules applicable where you operated or content you published, unless the damage is attributable to Cordaxis.
8.6. The online services (community, forum, clubs, messaging and rankings) depend on servers, on your connection and on external providers, and may therefore be subject to interruptions, maintenance or failures. We do not guarantee uninterrupted availability. If a prolonged interruption deprives you of the features you paid for, clauses 6 and 9 apply.
8.7. Profiles, settings, the flight log and the inventory are stored on your computer, and you are responsible for backing them up. We cannot recover data lost through hardware failure, formatting or accidental deletion. Data stored in the cloud can be exported at any time from User settings.
8.8. You may not resell the Program as your own, decompile it to circumvent the limits of the paid features, automate accounts or use it to fly in breach of the law. We may close the account of any user who does so, and that user shall be liable for any resulting damage.
8.9. Cordaxis is not liable for failures caused by circumstances beyond its reasonable control, such as outages of hosting or payment providers, network or power failures, cyberattacks, disasters or regulatory changes that require a feature to be suspended.
9 Term and termination
9.1. You may delete your account at any time from the "Privacy and your data" section of User settings.
9.2. We may close your account if you seriously breach clause 3, or repeatedly after a warning, and we will inform you of the decision and the reasons for it.
9.3. If we cease to provide the service, we will give reasonable notice and refund the unused portion of your subscription.
10 Changes to these Terms
We may only amend these Terms for one of these reasons: changes in the law or in decisions of the authorities; changes in the Program's features or in the providers that run it; security reasons; or to correct errors or clarify the wording. Amendments will be notified within the Program with reasonable notice, which will be at least thirty (30) days where they affect the price or reduce the features you paid for, unless a law or a security reason requires them to apply sooner, and will require your acceptance. If you do not accept them, you may cancel the subscription and delete your account, or ask us to do so by writing to cordaxis.rc@gmail.com, and the unused portion of your subscription will be refunded.
11 Governing law and jurisdiction
These Terms are governed by Spanish law. If you are a consumer, this does not deprive you of the protection afforded to you by the mandatory provisions of the law of your country of residence, and you may bring proceedings before the courts of your place of residence.
12 Contact
For any enquiry about these Terms, you may write to cordaxis.rc@gmail.com.