Terms of Use

Effective: 16 September 2026

Please read this carefully. By downloading or using any Deep Blue app you agree to these terms and to the safety notes below. The apps are fitness and wellbeing tools — they are not medical care, not a diagnosis, and not a method of contraception.

1. Who these terms are with

These Terms of Use ("Terms") are a binding agreement between you and Deep Blue (a trading name of SwiftBee Ltd, registered in the United Kingdom — "Deep Blue", "we", "us", or "our"). They govern your use of our mobile applications, websites, and any related services (collectively, the "Services").

2. Health & safety — exercise apps

This section applies to our exercise apps — Walking Tai Chi for Seniors and Military Calisthenics: Women. Section 3 covers CycleSync.

The Services are for general fitness and wellbeing. They are not medical advice, diagnosis, or treatment.
Consult your doctor or a qualified healthcare provider before starting, especially if you have a heart condition, high or low blood pressure, dizziness or balance issues, recent surgery, joint injury, osteoporosis, pregnancy, or any other condition that could be affected by exercise.
Work only within a comfortable range for your current fitness level. Warm up before training, use good form, and progress gradually. Stop immediately and rest if you feel pain, dizziness, chest discomfort, unusual shortness of breath, or any other symptom that concerns you.
Train on a flat, non-slip surface with enough clear space around you. For gentler programs, keep a sturdy chair or wall nearby for support.
In an emergency, stop and call your local emergency number.

You use the Services at your own risk and accept these safety notes.

3. CycleSync — what it is and what it isn't

CycleSync is a self-tracking and general wellbeing tool. It helps you record your cycle and see estimates based on what you have logged. It is not medical advice, diagnosis, or treatment, and it is not a medical device.

Not contraception. Do not use CycleSync to prevent pregnancy. Its fertile-window and ovulation estimates are not a fertility awareness method, have not been clinically validated for contraceptive use, and must not be relied on to avoid or achieve pregnancy. For contraception, speak to a healthcare professional.
Predictions are estimates. Predicted dates, phases, and windows are calculated from the entries you provide. Cycles vary for many reasons — stress, illness, medication, travel, breastfeeding, perimenopause, and hormonal conditions among them — so predictions can be wrong, and are least reliable when cycles are irregular or when you have logged only a few of them.
Not a substitute for care. Nothing in the app diagnoses pregnancy, infection, or any condition. Consult a doctor or qualified healthcare provider about unusual bleeding, severe pain, missed or irregular periods, a possible pregnancy, symptoms that concern you, or before making any decision about treatment or medication. Never delay seeking medical advice because of something the app showed you.
In an emergency — including heavy bleeding, severe abdominal pain, fainting, or fever — stop using the app and call your local emergency number or contact a healthcare professional immediately.
Your data is yours. How we handle the health data you enter — and what we will never do with it — is set out in our Privacy Policy.

You use CycleSync at your own risk and accept these notes.

4. Licence

Subject to these Terms, we grant you a limited, personal, non-exclusive, non-transferable licence to install and use the Services on devices you own or control, for your personal, non-commercial use.

5. Subscriptions and billing

Certain features are available only through a paid subscription offered through the App Store or Google Play. Available plans and prices are shown in the app before purchase.
Where a free trial is offered, it applies only to new subscribers and converts to a paid subscription at the end of the trial unless cancelled.
Subscriptions auto-renew at the price shown until cancelled. You can manage, pause, or cancel your subscription any time in your device's App Store or Google Play settings.
Refund requests are handled by Apple or Google under their standard policies. We're happy to help you find the right form — email admin@swiftbee.co.uk.

6. Content and intellectual property

All videos, text, imagery, plans, code, and other content in the Services are owned by Deep Blue or its licensors and are protected by copyright and other laws. You may not copy, redistribute, modify, or reverse-engineer any part of the Services except as expressly permitted by law.

7. Your account and conduct

Keep your account credentials secure. You are responsible for activity under your account.
Don't use the Services in a way that is unlawful, abusive, or that interferes with other users or our infrastructure.
You must be at least 13 years old to use the Services.

8. Third-party services

The Services rely on third-party providers (Apple, Google, Firebase, Mux) whose own terms apply where relevant. We are not responsible for outages or issues caused by those third parties.

9. Disclaimers

To the fullest extent permitted by law, the Services are provided "as is" and "as available", without warranties of any kind, express or implied — including any implied warranties of merchantability, fitness for a particular purpose, or non-infringement. We do not warrant that the Services will be uninterrupted, error-free, or produce specific health outcomes.

10. Limitation of liability

To the fullest extent permitted by law, Deep Blue and its officers, employees, and licensors will not be liable for any indirect, incidental, special, consequential, or punitive damages arising out of or related to your use of the Services, and our total aggregate liability will not exceed the amount you paid for the Services in the twelve months preceding the claim. Nothing in these Terms limits liability that cannot be limited by law — including for death or personal injury caused by our negligence, or for fraud.

11. Termination

You can stop using the Services at any time. We may suspend or terminate access if you materially breach these Terms. Sections that by their nature should survive termination (e.g. intellectual property, disclaimers, limitation of liability) will survive.

12. Changes to these Terms

We may update these Terms from time to time. Material changes will be surfaced in the app, and continued use of the Services after a change means you accept the updated Terms.

13. Governing law

These Terms are governed by the laws of England and Wales, and any dispute not resolved by good-faith negotiation shall be subject to the exclusive jurisdiction of the courts of England and Wales, unless mandatory local consumer law says otherwise.

14. Contact

Questions about these Terms? Email admin@swiftbee.co.uk.