Terms of use
Last updated: May 2026
Important - SYNC is not a medical device
SYNC does not provide medical advice, diagnosis or treatment and is not a medical device. Everything on the Platform is for general informational and personal wellness purposes only. Please always consult a qualified healthcare professional for any medical concern, injury or condition that requires professional assessment or treatment.
These Terms of Use (“Terms”) set out the rules for using the SYNC platform, including our website, mobile application and any associated services (together, the “Platform”), operated by SYNC Cycle Limited. Please read them carefully before you sign up.
By creating an account or using the Platform you agree to be bound by these Terms. If you do not agree, please do not use the Platform.
Where we say “we”, “us” or “our” we mean SYNC Cycle Limited. Where we say “you” or “your” we mean you, the user.
1. About Us
SYNC Cycle Limited is a company registered in England and Wales (Company No. 16878445). Our registered office is at 71–75 Shelton Street, Covent Garden, London, WC2H 9JQ.
You can contact us at hello@sync-your-cycle.com or by post at the address above.
If we need to contact you, we will do so by email using the address linked to your account.
2. Who Can Use SYNC
To use the Platform you must be at least 18 years old, resident in the United Kingdom and have the legal capacity to enter into a binding agreement.
By registering, you confirm that the information you provide is accurate and up to date. We may suspend or close accounts where we reasonably believe eligibility requirements have not been met.
3. How SYNC Works
SYNC connects to data from compatible health wearables and devices (such as Apple Watch, Oura Ring and WHOOP Band), together with information you input directly (such as menstrual cycle data). It uses that data to generate personalised health insights, including:
training readiness scores;
cycle-phase analysis;
recovery and sleep insights; and
activity and wellness trends.
Our insights are generated using artificial intelligence and machine learning. They are designed to help you understand patterns in your own data and to support informed personal decisions about your health, fitness and wellbeing. These insights depend on a minimum set of data signals being available. If insufficient data is present, insights may not be available or could be inaccurate.
4. Your Account
4.1 Creating an Account
You need to create an account to access the Platform and verify your identity via a one-time passcode sent to your email address.
4.2 Account security
When you register:
keep your login details and verification codes secure and do not share them with anyone else; and
tell us immediately if you believe your account has been accessed without your permission.
You are responsible for all activity that takes place under your account. We are not liable for loss arising from unauthorised access where you have not taken reasonable steps to keep your credentials secure.
4.3 Acceptable Use
You must not:
use the Platform for any unlawful purpose;
attempt to gain unauthorised access to any part of the Platform or its systems;
access all or any part of the Platform in order to build a product or service which competes with it;
attempt to copy, modify, duplicate, create derivative works from, frame, mirror, republish, download, display, transmit, or distribute all or any portion of the Platform in any form or media or by any means;
introduce viruses, malware or other harmful code;
scrape, harvest or extract data from the Platform by automated means;
impersonate any other person or misrepresent your identity;
use the Platform in any way that could damage, overburden or impair it; or
attempt to reverse-engineer, decompile or disassemble any part of the Platform’s software.
5. Connecting Your Wearables and Devices
5.1 By connecting a health wearable or device to SYNC:
you authorise us to access and process the health data that your device collects, as described in our Privacy Policy;
you confirm you are entitled to share that data with us;
you understand that the quality of our insights depends on the quality and accuracy of your device data; and
you acknowledge that consumer wearables are not medical-grade instruments and may not be fully accurate.
5.2 Apple, Oura, WHOOP and other device brands are independent companies. We are not affiliated with them and they are not responsible for the Platform or its outputs. Your use of their products is subject to their own terms and conditions.
5.3 We cannot guarantee that third-party integrations will always be available. If a manufacturer changes its API or data-sharing policies, the relevant integration may stop working. We will not be liable for that.
6. Our Use of Artificial Intelligence
The Platform uses artificial intelligence and machine learning to analyse your health data and generate personalised insights, scores and recommendations. AI-generated outputs are not infallible and, like any analytical tool, can produce results that are incomplete, inaccurate or not suited to your individual circumstances. Please always sense-check AI outputs and do not rely on them alone, particularly for any decision that could affect your health.
Your personal data and health data is not used to train, fine-tune or improve any artificial intelligence or machine learning model, whether ours or a third party’s. Where we use third-party AI technology providers, they are contractually bound by the same restriction. Our rights in respect of anonymised and aggregated data are set out separately in Section 12.2.
7. Health and Medical Disclaimer
SYNC is a personal wellness and health-tracking tool that uses data-driven insights to help you understand patterns in your cycle, fitness and recovery, and to support your own decision-making. It is not a medical device within the meaning of the UK Medical Devices Regulations 2002, is not regulated by the MHRA or any other clinical regulatory body, and is not a substitute for professional medical advice, diagnosis or treatment. Nothing on the Platform should be used to diagnose, treat, cure or prevent any medical condition.
If you have any health concern (including unusual symptoms, injuries, reproductive health issues or mental health concerns), please seek advice from a qualified healthcare professional such as your GP, practice nurse or a relevant specialist.
Nothing on the Platform should be treated as a recommendation to start, stop or change any medication, treatment or medical programme.
8. Third-Party Services and Links
The Platform connects to and may link to third-party services, apps, websites and products. We do not control those third parties and are not responsible for their content, availability, data accuracy, data practices or any loss you suffer as a result of using them. Your use of any third-party service is governed by that party’s own terms of service and privacy policy.
9. Subscriptions and Payment
9.1 How subscriptions work
Access to the Platform requires a paid subscription, which may be monthly or annual. Your subscription begins on the date you make your first payment (“Subscription Start Date”) and renews automatically at the end of your selected subscription period unless you cancel in accordance with Section 10.
Where you have been offered a free trial of the Platform, you may use the service without charge for 30 days from the date of signing up (or as otherwise specified at the time of signing-up).
9.2 Payment
Your subscription fee is charged in advance at the start of each subscription period. By subscribing, you authorise us to charge your chosen payment method automatically on each renewal date. All prices are shown in pounds sterling (GBP) and include VAT at the prevailing rate. The exact amount will be displayed before you confirm your subscription.
9.3 Failed payments
If a payment fails we will attempt to retry. If payment continues to fail, we may suspend or cancel your access. We will try to notify you before this happens.
9.4 Price changes
We may change our subscription price from time to time. If we increase the price, we will give you at least 30 days’ notice before the new price takes effect. You may cancel before the change takes effect if you do not wish to continue at the new price.
9.5 Payment processing
Payments are processed by a third-party payment provider. We do not store your full card details. Payment processing is subject to the provider’s own terms.
10. Cancellation, Suspension and Termination
10.1 Cancellation within 14 days
You have the right to cancel any paid subscription within 14 days of your Subscription Start Date without giving any reason. To exercise it, email us at hello@sync-your-cycle.com or use the cancellation option in your account settings. Refunds will be processed within 14 days of receiving your cancellation, using the same payment method.
10.2 Cancellation after 14 days
After the initial 14 day period you may cancel at any time by using your account settings or emailing hello@sync-your-cycle.com. Cancellation takes effect at the end of your current subscription period and you will retain access until that date. No refund is provided for any unused portion of a subscription period once the cooling-off period has passed.
10.3 Suspension and termination by SYNC
We may suspend or terminate your access to the Platform at any time in our discretion. Without limiting that right, we are likely to do so where:
you breach these Terms (in particular the acceptable use obligations in Section 13);
a payment remains outstanding after retries have failed;
we are required to act by law or by a regulator;
we reasonably suspect fraud or unauthorised use of your account; or
we decide to discontinue the Platform or any part of it.
Where we suspend or terminate for reasons other than your breach, we will give you reasonable advance notice where practicable and will refund any subscription fees paid for periods falling after the date your access ends. Where immediate action is required (for example in cases of serious breach, suspected fraud or legal obligation), we may act without prior notice.
10.4 Effect of termination or closure
When your account closes or is terminated for any reason: your right to access the Platform ends; we will retain or delete your personal data as described in our Privacy Policy; and any provisions of these Terms that are intended to survive termination (including Sections 11, 12, 13, 14, 17 and 18) will continue to apply.
11. Data protection
We take the privacy and security of your personal data (especially your health data) very seriously. Our Privacy Policy sets out in full what data we collect, how we use it and who it is shared with, as well as your rights under UK data protection laws.
12. Intellectual Property and Data Licences
12.1 Our content
The Platform and all of its content, including the software, design, text, graphics, algorithms, AI models and insights we generate, are owned by or licensed to us and are protected by intellectual property law. You may not copy, reproduce, distribute, sell or create derivative works from any part of the Platform without our prior written permission.
12.2 Our use of anonymised data
By using the Platform, you grant SYNC Cycle Limited a perpetual, irrevocable, royalty-free, sub-licensable licence to process and use data derived from your use of the Platform that has been genuinely anonymised and aggregated so that you, or any other individual, cannot reasonably be identified from it, whether alone or in combination with any other information (“Anonymised Data”). We may exercise this licence for the following purposes:
training, developing, fine-tuning and improving artificial intelligence and machine learning models used within or in connection with the Platform;
improving the accuracy, performance and safety of the Platform’s algorithms and features;
developing new features, products or services;
generating statistical research and insights about women’s health, fitness and wellbeing at a population level; and
producing aggregated reports, benchmarks or published research, none of which will identify any individual.
This licence survives the termination or expiry of your subscription.
12.3 Your data
You own your data that you input to the Platform. By using the Platform, you grant us a limited licence to process your personal data solely to provide the service to you, and as set out in this section.
12.4 Feedback
If you share feedback, suggestions or ideas with us, you agree that we can use them freely without any obligation to compensate you. This does not affect your data rights.
13. Warranties and Availability
13.1 What we promise
We will provide the Platform with reasonable care and skill and will take reasonable steps to keep it secure and available.
13.2 What we do not promise
Except as required by law, we make no other warranties about the Platform. To the fullest extent permitted by applicable law, we do not warrant that:
the Platform will be available at all times, uninterrupted or error-free;
any insight, score, analysis or output will be accurate, complete, up to date or suitable for your individual circumstances;
the Platform will meet your specific health or fitness needs;
any defect or error will be corrected; or
the Platform or its servers are free from viruses or other harmful components.
The Platform is provided on an “as is” and “as available” basis. All implied warranties, conditions or terms (including any implied warranty of fitness for a particular purpose, satisfactory quality or accuracy) are excluded to the fullest extent permitted by law.
14. Limitation of Liability
14.1 Losses we are not responsible for
To the fullest extent permitted by law, we will not be liable to you for:
any loss of profits, revenue, business, data, goodwill or anticipated savings;
any indirect or consequential loss; or
any loss arising from your reliance on the Platform’s insights, outputs or recommendations, including any health-related decision made on the basis of them.
14.2 Limit of our liability
Our total liability to you under or in connection with these Terms in any 12 month period will not exceed the total subscription fees you have paid to us in that same period.
14.3 What this section does not limit
Nothing in these Terms limits or excludes our liability for:
death or personal injury caused by our negligence;
fraud or fraudulent misrepresentation; or
any other matter where it would be unlawful for us to limit or exclude liability.
15. Changes to SYNC and These Terms
15.1 Changes to the Platform
Because we are in beta, SYNC will change regularly. We will try to give you advance notice of significant changes that might affect you.
15.2 Changes to these Terms
We may update these Terms from time to time. If we make material changes, we will notify you by email. Your continued use of the Platform after the effective date of any updated Terms constitutes acceptance of the changes.
16. Complaints and Disputes
If you have a complaint, please contact us first at hello@sync-your-cycle.com. We will aim to respond within 14 business days.
If we cannot resolve your complaint, you may be entitled to use an alternative dispute resolution (ADR) service. We will provide details of any ADR scheme we participate in on our website.
17. Governing Law and Jurisdiction
These Terms are governed by the law of England and Wales. Any dispute arising out of or in connection with these Terms will be subject to the exclusive jurisdiction of the courts of England and Wales, except that if you are a consumer resident in Scotland or Northern Ireland you may also bring proceedings in the courts of your home country. Nothing in this section affects your rights as a consumer under applicable UK consumer law.
18. General
18.1 Entire agreement
These Terms, together with our Privacy Policy, constitute the entire agreement between us relating to your use of the Platform and supersede all previous agreements, representations and understandings.
18.2 Severance
If any part of these Terms is found to be invalid or unenforceable, that part will be severed and the rest of the Terms will continue to apply.
18.3 Waiver
If we do not exercise a right or remedy available to us, that does not constitute a waiver of it. We can still exercise it in the future.
18.4 Assignment
You may not transfer your account or any rights under these Terms without our prior written consent. We may transfer our rights and obligations (for example as part of a sale of our business) and will notify you if we do.
18.5 Third parties
These Terms are between you and us. No other person has rights under the Contracts (Rights of Third Parties) Act 1999 to enforce any term of these Terms.
18.6 Force majeure
We will not be liable for any failure or delay caused by circumstances beyond our reasonable control, including internet outages, power failures, natural disasters or government action.
19. Contact Us
If you have any questions about these Terms or the Platform, please get in touch:
Post
SYNC Cycle Limited, 71–75 Shelton Street, Covent Garden, London, WC2H 9JQ
Website