Brightfold

Terms of service: Cyrca AI

Cyrca AI: Circadian Productivity Coach, by Brightfold. Last updated 24 October 2026

1. Acceptance of terms

By downloading, installing or using the Cyrca AI app ("the app"), you agree to these Terms of Service ("terms"). If you do not agree, do not use the app. These terms are a legally binding agreement between you and Brightfold ("we", "our", "us"), the studio that publishes the app.

2. Description of the service

Cyrca AI is a productivity coach based on chronobiology. It helps you fit your day (tasks, sleep, habits and focus sessions) to your circadian rhythm. It includes an AI chat assistant, sleep and energy analytics, task management and smart scheduling.

3. Your account

To use the app you sign in with a Google account or with an email address and password. The app is for people aged 16 and over. You are responsible for keeping your account secure and for all activity under it. Tell us at once at cyrca@brightfoldapps.com if you think someone else is using it.

4. Subscriptions and billing

4.1 Free tier

Cyrca AI offers limited features for free. Some features, including the AI chat assistant, advanced analytics and smart rescheduling, need an active Cyrca Pro subscription.

4.2 Cyrca Pro

Cyrca Pro is a monthly or annual subscription, billed through Google Play. Prices are shown in your local currency before you buy.

4.3 Free trial

We may offer a free trial on the annual plan. When the trial ends, the subscription starts and you are charged, unless you cancel before the trial ends.

4.4 Auto-renewal

Subscriptions renew automatically at the end of each period unless you cancel at least 24 hours before the renewal date. Your Google Play account is charged within the 24 hours before the current period ends.

4.5 Cancellation

You can cancel at any time in your Google Play subscriptions. Cancelling takes effect at the end of the current period, and you keep Pro until then. We do not refund part-used periods; refunds of Google Play purchases follow Google Play's refund policy.

4.6 Price changes

We may change subscription prices. We give reasonable notice first, and Google Play asks for your agreement where the law requires it.

5. Acceptable use

You agree not to:

6. Health disclaimer

Cyrca AI gives general wellness and productivity guidance based on published chronobiology research. It is not a medical device and does not give medical advice, diagnosis or treatment. What the AI assistant writes is for information only. Always ask a qualified healthcare professional before making decisions about your health, sleep or medication.

7. AI-generated content

The Cyrca AI chat assistant is powered by Google Gemini. Its answers are written by an AI model and may be inaccurate, incomplete or out of date. We are not liable for actions taken on the basis of AI answers. Do not rely on the assistant for medical, legal or financial decisions.

8. Intellectual property

The app, including its design, code, content and branding, belongs to Brightfold and is protected by intellectual property law. We grant you a limited, non-exclusive, non-transferable licence to use the app for personal, non-commercial purposes. Nothing in these terms transfers ownership to you.

9. Termination

We may suspend or close your account if you break these terms. You can delete your account at any time in the app under Settings → Delete account, on brightfoldapps.com/cyrca/delete-account, or by emailing cyrca@brightfoldapps.com. When your account ends, your right to use the app ends. Deleting your account does not cancel a Google Play subscription: cancel it in Google Play.

10. Disclaimer of warranties

The app is provided "as is" and "as available", without warranties of any kind, express or implied. We do not promise that it will be uninterrupted, error-free or free of harmful components.

11. Limitation of liability

To the extent the law allows, Brightfold is not liable for indirect, incidental, special, consequential or punitive damages arising from your use of the app or your inability to use it, including loss of data or revenue. Our total liability for any claim is limited to what you paid us in the 12 months before the claim. Nothing in these terms limits liability that cannot be limited by law, or your statutory rights as a consumer.

12. Changes to these terms

We may update these terms. We will tell you about material changes in the app or on this page. If you keep using the app after a change, you accept the new terms.

13. Governing law

These terms are governed by the applicable law. We will first try to resolve any dispute with you in good faith. If that fails, the courts of your country of residence have jurisdiction.

14. Contact

Questions about these terms: cyrca@brightfoldapps.com.