Terms of Use

Last Updated: August 3, 2026

1. Acceptance of Terms

By accessing the Ultra-Go website (the "Site"), registering for our waitlist, or downloading and using the Ultra-Go mobile application (the "App"), you agree to be bound by these Terms of Use ("Terms") and all applicable laws and regulations. If you do not agree with any part of these Terms, you must refrain from using the Site and the App.

2. Health, Pacing & Nutrition Disclaimer

IMPORTANT: Ultra-Go is NOT a medical tool and does NOT provide medical, clinical, or formal coaching advice.

Ultra-Go is an endurance sports logistics tool built for race strategy planning, pacing timeline calculation, and nutrition intake simulation. The calculations, target outputs, pacing split predictions, and nutritional intake suggestions provided by the App (including hourly targets for carbohydrates, fluids, calories, sodium, caffeine, potassium, magnesium, and calcium) are generated by mathematical models, scientific baselines, terrain/elevation distribution algorithms, and user-submitted inputs.

These calculations, estimates, and warnings:

  • Do not constitute medical, nutritional, health, clinical, or professional athletic coaching advice.
  • Must not be used to diagnose, treat, prevent, or self-manage any medical condition or acute physical distress.
  • Do not replace individual evaluation and direct guidance from qualified medical professionals, certified sports dietitians, or professional endurance coaches.
  • Are algorithmic approximations based on terrain data and user goals. Actual race-day conditions (including ambient temperature, relative humidity, altitude, gastrointestinal tolerance, weather shifts, and individual fatigue) can alter real-world physiological needs significantly.
  • Should not be relied upon as strict cutoff guarantees. Official race cutoffs, medical aid decisions, and race safety rules set by event organizers always take absolute precedence.

Participating in ultramarathons, trail running, long-distance endurance events, and high-intensity physical exertion involves inherent risks of severe physical injury, illness, hyponatremia, heat illness, severe dehydration, and life-threatening emergencies. You are solely responsible for evaluating your physical readiness, verifying that your intake strategies are safe for your personal health conditions, and adjusting your exertion or nutrition in real time based on your body's signals.

By using the App, you acknowledge and agree that your training and racing activities are undertaken entirely at your own risk. Ultra-Go, its developers, and affiliates disclaim all liability for any adverse health events, physiological injuries, or race disqualifications resulting from the reliance on the App's outputs, timelines, or deficit alerts.

3. Data Storage & Cloud Synchronization Options

Ultra-Go provides options for both on-device local storage and secure cloud synchronization depending on your subscription tier:

  • Free Tier (Local Storage): Standard usage processes and stores your data—including Runner Profiles, Fuel Pantry items, `.gpx` course tracks, Aid Stations, Carry Plans, Drop Bags, and Crew Checklists—directly on your physical device via local application storage (`AsyncStorage`). If you use the Free tier without cloud backup enabled, uninstalling the App or clearing app data will result in permanent local data loss. Free users are responsible for maintaining external backups.
  • Pro Subscription Tier (Cloud Sync & Backup): Users subscribed to the Pro tier unlock automated multi-device cloud synchronization and secure cloud backups. Your race strategies, profiles, pantry items, and course configurations are securely synchronized to cloud servers, allowing you to access and restore your data across multiple devices.

4. User Content & File Processing

When using features that import or export files within the App (such as uploading `.gpx` course maps or exporting PDF crew itineraries):

  • `.gpx` Course Files: You warrant that you have the right to import and process any `.gpx` files you upload. Files are processed in-memory on your device (`gpxParser`) and saved in your application database. You must not attempt to upload corrupt, malicious, or non-standard file formats.
  • PDF Crew Exports: Generated PDF crew itineraries and packing lists are provided strictly "as-is" for your offline convenience. You and your support crew remain responsible for verifying aid station locations, cutoff times, crew access rules, and driving directions with official race documentation.

5. Waitlist Sign-up & Communications

When registering your email address for the Ultra-Go waitlist on our Site, you consent to receive electronic communications regarding product release updates, beta testing access, feature announcements, and promotional news. Email processing is managed securely via our newsletter service provider, Kit (ConvertKit). You may opt out of future marketing communications at any time by clicking the "Unsubscribe" link in any email footer or by contacting us at info@pietersimons.com.

6. Pro Tier Subscriptions & Billing Terms

Ultra-Go offers a premium Pro Tier subscription providing access to enhanced features such as automated cloud synchronization, multi-device backup, advanced strategy analytics, and expanded planning tools.

  • Billing & Renewal: Pro subscriptions are billed on a recurring subscription basis (monthly or annually) via the respective application store platform (e.g., Apple App Store or Google Play Store). Payments will be charged to your app store account at confirmation of purchase.
  • Auto-Renewal & Cancellation: Subscriptions automatically renew unless auto-renew is turned off at least 24 hours before the end of the current billing period. You can manage or cancel your subscription at any time through your app store account settings. Refunds are subject to the terms and policies of the respective app store platform.

7. Intellectual Property

All software code, user interface designs, mathematical pacing models, macro intake algorithms, logos, trademarks, and visual assets on the Site and within the App are the exclusive intellectual property of Ultra-Go and its creators, protected under international copyright, trademark, and intellectual property laws. You may not reverse-engineer, decompile, copy, or redistribute any part of the App or Site without explicit written authorization.

8. Limitation of Liability

To the fullest extent permitted by applicable law, in no event shall Ultra-Go, its developers, or its suppliers be liable for any direct, indirect, incidental, consequential, special, or exemplary damages—including but not limited to loss of data, personal injury, adverse health consequences, missed race cutoffs, equipment loss, or business interruption—arising out of or in connection with your use or inability to use the Site or the App.

9. Governing Law & Jurisdiction

These Terms shall be governed by and construed in accordance with the laws of Belgium, European Union, without giving effect to any principles of conflicts of law. Any legal action, suit, or proceeding arising out of or relating to these Terms, the Site, or the App shall be instituted exclusively in the competent courts of Belgium.

10. Contact Information

If you have any questions, legal inquiries, or concerns regarding these Terms of Use, please reach out to us at:

Email: info@pietersimons.com