Privacy Policy

Last updated: 2026-04-05

CycleDay ("Company," "we," "us," "our," or "us") operates the cycleday.co website and application (the "Service"). This Privacy Policy explains our policies regarding the collection, use, disclosure, and safeguarding of your information when you use our Service, including any other media form, media channel, mobile website, or mobile application related or connected thereto.

Please read this Privacy Policy carefully. If you do not agree with our policies and practices, please do not use our Service. By accessing and using CycleDay, you acknowledge that you have read, understood, and agree to be bound by all the terms of this Privacy Policy. If you do not agree with our privacy practices, please discontinue use of the Service immediately.

Information We Collect

We collect information in several ways to provide, maintain, and improve our Service. The types of information we collect include:

Information You Provide Directly

Account Registration: When you create an account with CycleDay, we collect personal information including your name, email address, password, date of birth, biological sex, and other demographic information you choose to provide.

Health and Menstrual Cycle Data: We collect detailed information about your menstrual cycle, including cycle start and end dates, flow intensity, symptoms, emotional state, physical sensations, and any notes you add. This information is highly personal and sensitive.

Health Information: You may choose to provide additional health-related information such as contraceptive methods, medications, medical conditions, fertility information, and healthcare provider details.

Communication Data: When you contact us via email, contact forms, or customer support channels, we collect and retain your correspondence, including messages, attachments, and any information you provide.

Payment Information: If you make purchases through our Service, we collect billing address, payment method information, and transaction history. Payment processing is handled by third-party payment processors who maintain their own privacy policies.

Profile Information: You may optionally provide a profile picture, bio, and other profile customization details.

Information Collected Automatically

Device Information: We automatically collect information about the devices you use to access our Service, including device type, operating system version, unique device identifiers, and mobile network information.

Usage Information: We collect information about your interactions with our Service, including the features you access, the content you view, the actions you take, the duration and frequency of your activities, and any errors you encounter.

Location Information: Depending on your device settings and permissions, we may collect precise or approximate location information. You can control location data collection through your device settings.

Log Data: Our servers automatically record information created by your use of the Service, including IP address, browser type, operating system, referring page URLs, pages visited, timestamps, and clickstream data.

Cookies and Similar Technologies: We use cookies, web beacons, pixels, and similar tracking technologies to collect information about your browsing activities and preferences.

Information from Third Parties

We may receive information about you from third-party sources including social media platforms if you choose to connect your account, healthcare providers with your authorization, app analytics providers, and our business partners.

How We Use Your Information

We use the information we collect for various legitimate purposes, including:

Service Provision and Account Management: To create and maintain your account, process transactions, send account-related notifications, and provide customer support. We use cycle and health data to deliver personalized features, predictions, insights, and recommendations based on your menstrual cycle patterns.

Personalization and Customization: To tailor the Service experience to your individual needs and preferences, display personalized content, and adjust features based on your health patterns and usage behavior.

Health Analytics and Insights: To analyze your cycle data and generate insights, statistics, reports, and predictions about your menstrual health and wellness. This helps us provide valuable health information and trend analysis.

Communication: To send you transactional emails, system alerts, feature updates, educational content about menstrual health, and customer support responses. We only send marketing communications when you have opted in.

Research and Development: To improve our Service, develop new features, conduct user research with your consent, perform analytics and data analysis, and better understand user needs and preferences.

Safety and Security: To detect, prevent, and address fraud, abuse, security incidents, and other harmful or illegal activity. We use this information to protect the rights, property, and safety of our Company, users, and the public.

Legal Compliance: To comply with applicable laws, regulations, legal processes, and governmental requests.

Aggregated Analytics: To create anonymized, aggregated reports and statistics about general usage patterns, which do not identify individual users.

Data Sharing and Disclosure

We are committed to protecting your privacy and do not sell, trade, or rent your personal information to third parties. However, we may share information in the following circumstances:

Service Providers: We share information with trusted third-party service providers who perform services on our behalf, including cloud hosting providers, payment processors, email service providers, analytics providers, and customer support platforms. These service providers are contractually obligated to use your information only as necessary to provide services to us and maintain strict confidentiality.

Business Partners: With your explicit consent, we may share information with healthcare providers, wellness partners, or other entities to enhance our Service offerings.

Legal Requirements and Protection: We may disclose information when required by law, by court order, or if we reasonably believe that disclosure is necessary to comply with legal obligations, protect and defend our legal rights, enforce our Terms of Service or other agreements, protect the security or integrity of our Service, or protect the rights, property, safety, or security of users or the public.

Business Transitions: If CycleDay is involved in a merger, acquisition, bankruptcy, dissolution, reorganization, or similar transaction or proceeding, your information may be transferred as part of that transaction. We will provide notice before your information becomes subject to a different privacy policy.

Aggregated and De-identified Information: We may freely share aggregated or de-identified information that cannot reasonably be used to identify you with third parties for research, marketing, analytics, and other purposes without your consent or notice.

With Your Consent: We may share your information for other purposes with your explicit consent or at your direction.

Cookies and Similar Technologies

We use cookies, web beacons, pixels, and similar tracking technologies to collect and store information about your online activities, preferences, and interactions with our Service.

Types of Cookies We Use:

Essential Cookies: These cookies are necessary for the Service to function properly. They enable core functionality such as user authentication, security, and basic site navigation. These cookies cannot be disabled without impairing Service functionality.

Performance and Analytics Cookies: These cookies help us understand how users interact with our Service by collecting information about page visits, features used, referral sources, and other usage patterns. This information helps us improve and optimize our Service.

Preference Cookies: These cookies remember your choices and preferences, including language settings, accessibility preferences, and other customizations, to personalize your experience.

Targeting and Advertising Cookies: These cookies may be used to display targeted advertisements based on your interests and online behavior across different websites.

Cookie Management: You can control cookies through your browser settings. Most browsers allow you to refuse cookies or alert you when cookies are being sent. However, blocking cookies may affect your ability to use certain features of our Service. For information about managing cookies, visit www.allaboutcookies.org. You may also opt out of certain targeted advertising through industry opt-out tools.

Third-Party Tracking: Third-party analytics and advertising partners may use cookies and similar technologies to track your online activities across websites. You can control this through your browser settings and industry opt-out mechanisms.

Your Privacy Rights and Choices

Depending on your location, you may have certain rights regarding your personal information:

Access and Portability: You have the right to request a copy of the personal information we hold about you in a commonly used, machine-readable format.

Correction: You have the right to correct inaccurate or incomplete information about yourself through your account settings or by contacting us.

Deletion: You have the right to request the deletion of your personal information, subject to certain legal exceptions. Please note that some information may need to be retained for legal, tax, or operational purposes.

Opt-Out of Communications: You can opt out of receiving marketing emails by clicking the unsubscribe link in our emails or updating your account preferences. Please note that you cannot opt out of transactional communications necessary to provide our Service.

Opt-Out of Tracking: You can control cookies, web beacons, and similar technologies through your browser settings and opt-out mechanisms provided by third-party providers.

California Privacy Rights: California residents have specific rights under the California Consumer Privacy Act, including the right to know, delete, and opt-out of the sale or sharing of personal information. To exercise these rights, please contact us using the information provided in the Contact section.

European Privacy Rights: Residents of the European Union and certain other territories have rights under the General Data Protection Regulation (GDPR) and similar regulations, including the rights to access, rectify, erase, restrict processing, data portability, and object to processing. To exercise these rights, contact us at the information provided below.

Exercising Your Rights: To exercise any of these rights, please submit a written request to our Privacy Team using the contact information provided at the end of this policy. We will respond to your request in accordance with applicable law, generally within thirty (30) days. We may require verification of your identity before fulfilling your request.

Data Security

CycleDay takes the security of your personal information seriously and implements comprehensive technical, administrative, and physical safeguards designed to protect your information against unauthorized access, disclosure, alteration, and destruction.

Security Measures: Our security measures include industry-standard encryption protocols (SSL/TLS), secure authentication mechanisms, access controls limiting data to authorized personnel, regular security assessments and vulnerability testing, and monitoring systems to detect and prevent unauthorized access.

Data Encryption: Sensitive information, including your cycle data and health information, is encrypted both in transit and at rest using industry-standard encryption methods.

Access Controls: We restrict access to