Terms of service
The ChallengeUS service is provided by Shatoot GmbH, Zug, Switzerland. To use it, we ask you to accept these terms in the app.
Last updated: 2026-10-22
The service
ChallengeUS generates training plans and adapts them to your data with declared rules and, if you enable it, with an AI-based conversational coach. The coach's suggestions are only suggestions: you decide whether to apply them. The AI-based coach can make mistakes.
Not medical advice
ChallengeUS is a sports training service. It is not a medical device and does not give medical advice: plans, figures and the coach's messages, including those generated by artificial intelligence, do not replace the advice of a doctor. See a doctor before you start or increase your training, especially if you have heart or blood pressure problems, chest pain, dizziness or fainting, an injury or a chronic illness, if you are pregnant or if you take medication regularly. Many races require a medical certificate: check with the organiser.
Your training, your responsibility
You decide whether, when and how to train and whether to take part in a race, and that choice is your responsibility. Suggestions are based on the data available, which may be incomplete or wrong. Always consider how you feel: if you are in pain, have a fever, feel dizzy or something is not right, stop and, if necessary, see a doctor. Chest pain, unusual shortness of breath or fainting: stop immediately and call the emergency services (112; in Switzerland 144). Training and racing carry risks, including the risk of injury: by choosing to train, you accept them as part of the sport.
Account and acceptable use
You must be at least 16. You are responsible for your credentials. Do not use the service for unlawful purposes, to extract other users' data or to overload the systems. The local Garmin connector uses your credentials on your own computer, under your responsibility and Garmin's terms.
Pioneers
The first 200 athletes who reach at least 4 active weeks become ChallengeUS pioneers. Active weeks count if they end by 31 March 2027, before or after ChallengeUS is released on the App Store. Once the 200 places are taken, or after 31 March 2027, no more are added. An active week is a week, Monday to Sunday, in which you opened the app on at least two days and recorded at least one workout. Pioneers get everything included in the ChallengeUS subscription free of charge, AI coach included, for as long as the service runs and their account exists. This is only a benefit in using the service: it gives no shares, holdings or other rights in Shatoot GmbH. Third-party services, such as race entries, products or any human coaches, are not included. Fair use applies: up to 10 messages a day to the coach, not counting automatic suggestions; we may change this limit with notice in the app, without removing the coach. Pioneer status is personal, cannot be transferred and is lost if you delete your account or in case of abuse or breach of these terms.
Groups and user content
In the Groups you talk to other athletes and you are responsible for what you write. Insults, threats, offensive, discriminatory, sexual or illegal content, spam and advertising, and other people's personal data are not allowed. There is no tolerance for objectionable content or abusive users.
You can report a message and block a user in the app. We review reports and may remove messages and exclude from the Groups, without notice, anyone who breaks these rules. For urgent reports: info@challengeus.com.
Messages are visible to every member of the group: do not share information you do not want other athletes to know.
Availability and changes
The service may change, be interrupted or contain errors. We may change features and these terms with notice in the app. If we change these terms significantly, we will tell you in the app and ask you to accept them again. You can delete your account at any time in the app (More → Delete account).
Liability
We are liable for damage caused by us intentionally or through gross negligence and, towards consumers, in all cases in which the law does not allow our liability to be limited, in particular for death or personal injury. In all other cases, to the extent permitted by law, we are not liable for indirect damage, for damage caused by incorrect data from third-party services (for example Garmin) or for interruptions of the service. Nothing in these terms limits your statutory rights as a consumer.
Law and jurisdiction
Swiss law. Jurisdiction: the courts of the Canton of Zug (Switzerland). Mandatory consumer rights of your country of residence remain unaffected, including the right to bring proceedings before the courts where you live. Contact: info@challengeus.com.