Terms of Service

1. Acceptance of Terms & Entity Identification

Welcome to Celeste Cycle & Fertility Wellness (“Celeste”, “we”, “us”, or “our”). The Service is owned and operated by Ranberg ehf. (doing business as Ranberg Studios), an entity organized and existing under the laws of Iceland (Registration / Kennitala available upon legal notice; registered in Reykjavík, Iceland).

These Terms of Service (“Terms”) govern your download, installation, access, and use of the Celeste mobile and web applications, documentation, and related services (collectively, the “Service”).

By downloading, accessing, or using the Service, you signify your irrevocable agreement to these Terms. If you do not agree to all provisions of these Terms, you must discontinue use of the Service immediately and remove the application from your devices.

2. Medical Disclaimer & Not Medical Advice

Celeste is for educational, informational, and personal wellness record-keeping only.

• No Doctor-Patient Relationship: The Service does not provide medical diagnoses, clinical treatment plans, prescriptions, or personalized medical consultations. Using Celeste does not create a physician-patient, clinician-patient, or any professional healthcare relationship with Ranberg ehf. or its team.
• Not a Certified Contraceptive: Projections of cycle phases, fertile windows, ovulation estimates, and thermal cadence shifts are mathematical and observational estimates based on historical inputs. They must never be relied upon as an infallible method of birth control or clinical pregnancy prevention.
• Consult Healthcare Providers: Always seek the counsel of a licensed medical doctor, gynecologist, or healthcare professional regarding menstrual irregularities, unusual pain, fertility inquiries, or specific clinical conditions. Never disregard or delay professional clinical guidance because of information surfaced in Celeste.

3. Privacy & Local-First Architecture (GDPR / Persónuvernd)

Celeste is architected upon strict local-first, zero-cloud principles and complies fully with European data protection standards (GDPR / Icelandic Act on Data Protection and the Processing of Personal Data no. 90/2018):

• All personal cycle logs, cervical mucus observations, temperatures, intimate logs, and mood entries are stored strictly on the local storage partition of your device.
• Ranberg ehf. operates no remote databases that aggregate, transmit, or monetize your reproductive health observations.
• For an exhaustive technical breakdown of on-device encryption, biometric safeguards, zero-telemetry commitments, and data portability, please consult our companion Privacy Policy.

4. In-App Subscriptions, Purchases & Billing

Celeste offers optional premium membership tiers that unlock advanced analytics, temperature curve visualizations, and unlimited symptom logging:

• App Store Billing: All financial transactions, recurring billing cycles, and payment authorizations are processed directly by the Apple App Store (Apple Inc.) or Google Play Store (Google LLC). Ranberg ehf. maintains no custody of your payment card numbers or banking credentials.
• Automatic Renewal: Subscriptions automatically renew at the close of the stated billing cadence (e.g., monthly or annual) unless cancelled at least 24 hours prior to the conclusion of the current subscription cycle.
• Cancellation & Statutory Withdrawal Rights: You may cancel future renewals at any time via your device operating system account settings (Apple ID or Google Account). For consumers residing in Iceland and the European Economic Area (EEA), statutory right-of-withdrawal rules for digital content apply in accordance with platform store mechanisms and EEA consumer legislation.
• Promotional Passes & Lifetime Keys: Ranberg ehf. may provide promotional redeem codes. Promotional redemption tokens are evaluated locally or via anonymized platform tokens and remain subject to fair usage guidelines.

5. User Responsibilities & Device Security

Because Celeste operates without central cloud user accounts or remote database recovery:

• Custody of Records: You are solely responsible for maintaining backups of your records using the integrated JSON Export feature. Ranberg ehf. cannot reconstruct logs lost through physical device destruction, system resets, or unbacked app uninstallation.
• Device Access Security: You are responsible for safeguarding physical access to your device. We encourage enabling device passcodes, biometric locking (Face ID / Touch ID / Fingerprint), and the application's native 4-digit PIN lock.
• Accuracy of Entries: Projections and statistical models reflect the data you provide. Inaccurate or intermittent entries will affect algorithmic projections.

6. Intellectual Property & Limited License

Ranberg ehf. grants you a revocable, non-exclusive, non-transferable, limited personal license to install and run the application on authorized devices solely for personal, non-commercial purposes.

All copyrights, trademarks, interface designs, mathematical calculation algorithms, typography layouts, and software source code remain the exclusive intellectual property of Ranberg ehf. (Ranberg Studios) and its licensors. You agree not to reverse engineer, decompile, disassemble, or derive commercial replicas of the software.

7. Disclaimer of Warranties

THE SERVICE IS PROVIDED ON AN “AS IS” AND “AS AVAILABLE” BASIS, WITHOUT WARRANTIES OR GUARANTEES OF ANY KIND, EITHER EXPRESS, IMPLIED, OR STATUTORY. TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE JURISDICTION, RANBERG EHF. DISCLAIMS ALL WARRANTIES, INCLUDING BUT NOT LIMITED TO MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, FREEDOM FROM PROGRAMMING DEFECTS, ALGORITHMIC ACCURACY, OR CONTINUOUS AVAILABILITY. NOTHING IN THIS SECTION RESTRICTS MANDATORY STATUTORY CONSUMER RIGHTS GUARANTEED UNDER ICELANDIC CONSUMER LAW OR APPLICABLE EEA DIRECTIVES.

8. Limitation of Liability

TO THE FULLEST EXTENT PERMITTED BY LAW, IN NO EVENT SHALL RANBERG EHF., ITS DIRECTORS, EMPLOYEES, AFFILIATES, OR LICENSORS BE LIABLE FOR ANY INDIRECT, INCIDENTAL, CONSEQUENTIAL, SPECIAL, PUNITIVE, OR EXEMPLARY DAMAGES, INCLUDING BUT NOT LIMITED TO HEALTH-RELATED COMPLICATIONS, UNINTENDED CONCEPTION, LOSS OF DATA, DEVICE DAMAGE, OR INTERRUPTION OF USAGE, ARISING OUT OF OR IN CONNECTION WITH YOUR USE OR INABILITY TO USE THE SERVICE.

9. Modifications to the Terms

Ranberg ehf. reserves the right to revise or update these Terms periodically to reflect evolving regulatory frameworks, platform guidelines, or architectural advancements. When revisions are made, the effective date at the top of this document will be updated. Continued use of Celeste following any posted revisions constitutes your binding agreement to the amended Terms.

10. Governing Law, Jurisdiction & Contact

These Terms, and any dispute or claim arising out of or in connection with them or their subject matter, shall be governed by and construed in accordance with the laws of Iceland (íslensk lög), without giving effect to any principles of conflicts of law.

Any dispute arising out of or in connection with these Terms shall be subject to the exclusive jurisdiction of the District Court of Reykjavík (Héraðsdómur Reykjavíkur), Iceland, unless mandatory consumer protection law in your habitual country of residence provides an alternative legal forum.

Official Operator Details:
Ranberg Studios (Ranberg ehf.)
Reykjavík, Iceland
For legal inquiries, terms clarification, or formal correspondence, please reach out via our project communications channel or to the Ranberg Studios legal desk.