OA Coach — Terms of Service

Effective date: 16 June 2026
Last updated: 16 June 2026

These Terms of Service ("Terms") govern your access to and use of the OA Coach mobile application ("OA Coach", "the App"), published and operated by Vulsen Pty Ltd (ABN 27 613 572 473) ("Vulsen", "we", "us", "our"), a company registered in New South Wales, Australia, on behalf of The University of Sydney ("the University").

The App and all intellectual property in it are owned by the University. Vulsen operates and publishes OA Coach on the University's behalf. OA Coach is used as part of research conducted by the University — the COASTAL randomised controlled trial.

Please read these Terms carefully. By creating an account or using the App, you agree to be bound by these Terms and by our Privacy Policy. If you do not agree, do not use the App.

1. Eligibility

You must be 18 years of age or older to use OA Coach. By using the App, you confirm that you meet this requirement and that the information you provide is accurate.

2. About OA Coach — important medical disclaimer

OA Coach is a self-management support tool designed to help people with knee osteoarthritis adopt healthy behaviours through education, activity prompts, goal setting, and progress feedback. It is intended to support, not replace, care from qualified health professionals.

OA Coach does not provide medical advice, diagnosis, or treatment. The information, notifications, and educational messages it provides are general in nature and may not be appropriate for your individual circumstances.

• Always seek the advice of your doctor or other qualified health professional with any questions about a medical condition or before starting, changing, or stopping any exercise, treatment, or medication.
• Do not disregard or delay seeking professional medical advice because of something you have read or received in the App.
• In an emergency, call 000 (in Australia) or your local emergency number immediately. Do not rely on the App in an emergency.

You use the App and act on its content at your own discretion and risk.

3. Your account

You are responsible for maintaining the confidentiality of your login credentials and for all activity under your account. Notify us promptly at info@vulsen.com if you suspect unauthorised use.

4. Acceptable use

You agree not to:

• Use the App for any unlawful purpose or in breach of these Terms.
• Attempt to gain unauthorised access to the App, its systems, or other users' data.
• Interfere with or disrupt the App's operation or security.
• Reverse engineer, copy, or create derivative works from the App except as permitted by law.
• Provide false information or impersonate another person.

5. Third-party services and connected devices

OA Coach integrates with third-party services and devices, including the Google Health API and compatible wearable devices (such as Fitbit). Your use of those services and devices is subject to their own terms and privacy policies, including Google's terms. We are not responsible for third-party services, the accuracy of data they provide, or any changes to or discontinuation of those services.

The health and fitness data shown in OA Coach depends on data from your connected device and account. We do not guarantee its accuracy, completeness, or availability.

6. Research participation

OA Coach is used as part of the COASTAL randomised controlled trial (Comparison of Osteoarthritis Management Programs: remote versus face-to-face care; ANZCTR registration ACTRN12624000996561), conducted by the University. Your participation in the research is voluntary and is governed by a separate Participant Information Statement and Consent Form and by the approval of the Northern Sydney Local Health District Human Research Ethics Committee (reference 2024/ETH01461). These Terms do not replace or override that consent process, and nothing in these Terms affects your rights as a research participant. To ask questions about the research or to withdraw, contact the study team at coastal.study@sydney.edu.au.

7. Intellectual property

All intellectual property in the App and its content — including text, educational messages, notifications, graphics, logos, and software — is wholly owned by The University of Sydney. Vulsen operates and publishes OA Coach on the University's behalf and claims no ownership of, or commercial rights in, the App, its content, or the data collected through it. You are granted a limited, non-exclusive, non-transferable, revocable licence to use the App for your personal, non-commercial self-management purposes. You may not copy, distribute, modify, or commercially exploit any part of the App without the prior written consent of the University.

8. Privacy

Our collection and handling of your personal and health information is described in our Privacy Policy, which forms part of these Terms. By using the App, you acknowledge that you have read and understood it.

9. Disclaimers

To the maximum extent permitted by law, the App is provided "as is" and "as available", without warranties of any kind, whether express or implied, including warranties of merchantability, fitness for a particular purpose, accuracy, or non-infringement. We do not warrant that the App will be uninterrupted, error-free, secure, or that defects will be corrected.

Nothing in these Terms excludes, restricts, or modifies any consumer guarantee, right, or remedy under the Australian Consumer Law or other applicable law that cannot lawfully be excluded.

10. Limitation of liability

To the maximum extent permitted by law, and subject to any non-excludable rights under the Australian Consumer Law, Vulsen and its directors, officers, employees, and contractors will not be liable for any indirect, incidental, special, consequential, or punitive damages, or for any loss of data, profits, or goodwill, arising out of or in connection with your use of, or inability to use, the App.

Where our liability cannot be excluded but can be limited, our liability is limited, at our option, to re-supplying the App or paying the cost of having it re-supplied.

11. Indemnity

To the extent permitted by law, you agree to indemnify and hold harmless Vulsen and its directors, officers, employees, and contractors from any claims, liabilities, damages, and expenses arising from your breach of these Terms or your misuse of the App.

12. Suspension and termination

You may stop using the App and delete your account at any time. We may suspend or terminate your access to the App, with or without notice, if you breach these Terms, or where necessary for security, legal, or operational reasons (including discontinuation of the App). On termination, the licence granted to you ends, though provisions that by their nature should survive (such as intellectual property, disclaimers, and limitation of liability) will continue to apply.

13. Changes to these Terms

We may update these Terms from time to time. We will post the updated version in the App and update the "Last updated" date. Where changes are material, we will take reasonable steps to notify you. Your continued use of the App after changes take effect constitutes acceptance of the updated Terms.

14. Governing law

These Terms are governed by the laws of New South Wales, Australia, and you submit to the non-exclusive jurisdiction of the courts of that State.

15. Contact us

For questions about these Terms, contact:

• OA Coach support (Vulsen Pty Ltd): info@vulsen.com