SunSync — Stay in the sun, safely.

Stay in the
sun, safely.

SunSync is a wellness-first UV companion. It watches the sky for you, paces your sunscreen, and turns sun safety into a thirty-second ritual you'll actually keep.

☀︎ Free on the App Store · Plus from $1.99/mo

A dashboard that
reads the sky.

Live UV index, peak hours, cloud cover, and temperature — plus an honest answer to the only question that matters, am I still protected?

☉ Live UV ring. Glowing color from green to violet, matched to WHO's UV scale.

◷ Reapply countdown. Calculated from your SPF, activity, and sweat — not a flat 2 hours.

✦ Daily insight. A quiet observation tuned to your recent sessions and skin type.

Sun habits, quietly
understood.

Your weekly protection score, a full year of trends, and your complete session history — gentle observations that never preach. Part of SunSync Plus.

~ Weekly protection score. One number from your reapply adherence and UV exposure.

↗ Yearly trends. Protection and outdoor time across the whole year, not just days.

♡ Full history. Every session you've logged, kept and searchable.

The short version: SunSync does not sell personal information, serve ads, use the advertising identifier, or track you across other companies' apps and websites. SunSync uses limited service providers to run the app. Precise location is used for local UV conditions, and some profile and sun-exposure information may be sensitive.

1. Scope and who we are

This Privacy Policy applies to the SunSync iPhone and Apple Watch applications, widgets, website, and related services (collectively, the "Services"). The Services are provided by SunSync ("SunSync," "we," "us," or "our"), a product by Oscillara.

SunSync is a consumer wellness tool, not a healthcare provider, and information in the Services is not a medical record. This policy does not cover third-party services under their own privacy policies.

2. Information we collect

Account and authentication information

When you create an account, we receive your Firebase user identifier, email address, sign-in provider, and authentication status. You may sign in using email and password, Sign in with Apple, or Google Sign-In. Firebase Authentication handles passwords; SunSync does not receive or store your plaintext password.

Profile and personalization information

You may provide your name, age range, biological sex, Fitzpatrick skin type, onboarding status, and settings. We use this information to personalize estimates, reminders, and the app experience. Skin type, sex, and age information may be considered sensitive personal information in some jurisdictions.

Sun exposure and sunscreen information

SunSync may process sunscreen SPF, water-resistance choices, activities, UV conditions, session duration, protection scores, timestamps, reapplication activity, and session location. Sunscreen profiles and session history are currently stored locally on your device and shared App Group so they can work with Apple Watch and widgets.

Precise location and weather

With your permission, SunSync accesses location while you use the app. Coordinates are sent to Apple WeatherKit to obtain local weather and UV information. Session coordinates may also be saved with local session history. SunSync does not request background location.

Usage, analytics, and technical information

Firebase Analytics and related SDKs may collect app opens, sessions, screen views, sign-up and sign-in events, onboarding progress, session events, paywall and purchase events, app-instance identifiers, device model, operating-system version, IP-derived information, and diagnostic data. Analytics may be associated with your Firebase user ID. SunSync does not use Apple's advertising identifier (IDFA) or App Tracking Transparency permission and does not use this information for cross-app advertising.

Purchases and subscriptions

Apple processes App Store payments. RevenueCat receives a SunSync user identifier and subscription receipt or entitlement information so we can provide and restore SunSync Plus. We do not receive your full payment-card details.

Information stored on your device

SunSync uses local preferences and files for session history, active sessions, sunscreen profiles, Apple Watch session state, and cached UV data. This information may remain until you delete it, delete your account where applicable, or uninstall the app.

3. How we use information

Provide accounts, authentication, syncing, widgets, and Apple Watch features.
Calculate and display UV conditions, protection timing, scores, and reminders.
Personalize the Services using the profile and preferences you choose to provide.
Process, verify, restore, and manage SunSync Plus subscriptions.
Send notifications you request, such as reapplication and UV alerts.
Understand feature use, troubleshoot problems, secure accounts, and improve reliability.
Comply with law, enforce our Terms, and protect users, SunSync, and others.

4. Legal bases for processing

Where the law requires a legal basis, we process information as needed to perform our contract with you, with your consent, for our legitimate interests in operating and improving the Services, and to comply with legal obligations. We rely on consent where required for precise location, notifications, and information treated as sensitive under applicable law. You can withdraw consent through device settings or by contacting us, although this does not affect earlier processing.

5. When we disclose information

We disclose information only as reasonably necessary to the following recipients:

Google Firebase and Google Sign-In: authentication, cloud profile storage, analytics, security, and diagnostics.
Apple: Sign in with Apple, WeatherKit, App Store and StoreKit purchases, Apple Watch functionality, and notifications.
RevenueCat: subscription status, entitlement management, and purchase restoration.
Authorities or other parties: when required by law or reasonably necessary to protect rights, safety, security, and the integrity of the Services.
A successor organization: in connection with a merger, financing, reorganization, or sale, subject to appropriate safeguards and notice where required.

These providers may process information in accordance with their own terms and privacy notices. SunSync does not sell personal information, share it for cross-context behavioral advertising, or use it to serve targeted ads.

6. Retention and deletion

We keep account and cloud profile information while your account is active and as needed to provide the Services. We may retain limited records longer when required for security, fraud prevention, legal compliance, dispute resolution, or enforcement. Analytics and diagnostic information is retained according to our provider settings and applicable law.

You can request account deletion from within SunSync. Deleting your account deletes your Firebase Authentication account and SunSync cloud user profile. Local SunSync data is removed through the app's deletion flow where supported and can also be removed by uninstalling the app. Apple and RevenueCat may retain transaction records or other data they are legally required or independently permitted to keep.

7. Your choices and privacy rights

Change location and notification permissions in iOS Settings.
Review and correct profile information in the app.
Delete your SunSync account using the in-app account deletion control.
Contact us to request access, correction, deletion, portability, restriction, or objection where applicable.

California residents may request to know, correct, or delete covered personal information and may exercise applicable rights concerning sensitive personal information without discrimination. SunSync does not sell or share personal information as those terms are defined for cross-context behavioral advertising. Residents of the EEA, United Kingdom, and other regions may have additional rights, including the right to complain to a local data protection authority. We may need to verify your identity before completing a request.

8. Children and teens

SunSync is not directed to children under 13, and we do not knowingly collect personal information from a child under 13. Users under the age of legal majority must have a parent or legal guardian's permission to use the Services. If you believe a child under 13 has provided information, contact us so we can investigate and delete it.

9. Security and international transfers

We use reasonable administrative, technical, and organizational safeguards designed to protect personal information. No storage or transmission method is completely secure, so we cannot guarantee absolute security. SunSync and its providers may process information in the United States and other countries. Where required, we use recognized transfer mechanisms and safeguards.

10. Changes to this policy

We may update this policy as the Services, providers, or law change. We will post the revised policy with a new effective date and provide additional notice when required. Continued use after an update means the revised policy applies to future use.

11. Contact us

For privacy questions or requests, email SunSync@oscillara.dev. Please include "Privacy Request" in the subject line and identify the right you wish to exercise.

Please read these Terms carefully. By downloading, creating an account, purchasing a subscription, or using SunSync, you agree to these Terms. If you do not agree, do not use the Services.

1. Eligibility and accounts

You must be at least 13 to use SunSync. If you are under the age of legal majority where you live, you may use SunSync only with permission from a parent or legal guardian. You must provide accurate account information, keep your credentials secure, and promptly notify us of suspected unauthorized use. You are responsible for activity under your account.

2. The SunSync service

SunSync provides consumer wellness features including UV information, sunscreen timing, reminders, exposure history, scores, insights, widgets, and Apple Watch features. Features may depend on your device, operating system, location permission, internet connection, third-party services, and subscription status. We may add, change, suspend, or discontinue features when reasonably necessary.

Health and safety disclaimer. SunSync is for general informational and wellness purposes only. It is not a medical device, diagnosis, treatment, prescription, or substitute for advice from a qualified healthcare professional. UV conditions, protection scores, timers, reminders, and recommendations are estimates and may be delayed, incomplete, unavailable, or inaccurate. Never rely on SunSync as your only protection from sun exposure. Follow sunscreen labels, public-health guidance, local conditions, and advice from your clinician. Seek professional or emergency help when appropriate.

3. License and ownership

Subject to these Terms, SunSync grants you a personal, limited, revocable, non-exclusive, non-transferable license to use the Services on Apple-branded devices you own or control as permitted by Apple usage rules. SunSync and its licensors retain all rights in the Services, including software, design, text, graphics, trademarks, and other content. These Terms do not transfer ownership to you.

You retain ownership of information you submit. You grant SunSync a limited license to host, process, transmit, and display that information only as needed to provide, secure, and improve the Services and comply with law, subject to the Privacy Policy.

4. Acceptable use

You agree not to:

Use the Services unlawfully, fraudulently, or in a way that harms another person.
Reverse engineer, copy, modify, scrape, or create derivative works except where law expressly allows it.
Bypass access controls, subscription checks, security features, or usage limits.
Interfere with the Services, introduce malicious code, probe systems, or access another user's account.
Use SunSync to provide medical care, emergency response, or other high-risk services.
Misrepresent your identity or submit information you do not have the right to use.

5. SunSync Plus subscriptions

SunSync Plus is an auto-renewing subscription billed through your Apple ID. The price, billing period, trial length, and available features are shown before purchase. Unless canceled, a subscription renews automatically and Apple may charge your account within 24 hours before the current period ends. Manage or cancel subscriptions in your Apple ID subscription settings. Cancel at least 24 hours before renewal to avoid the next charge.

A free trial, if offered, converts to a paid subscription unless canceled before it ends. Unused trial time may be forfeited when you purchase a subscription. Apple handles billing, cancellations, and refund requests under its rules. Prices and features may change with advance notice where required. Deleting the app or your SunSync account does not itself cancel an App Store subscription.

6. Third-party services

SunSync relies on services provided by Apple, Google Firebase, Google Sign-In, RevenueCat, and others. Your use of those services may also be governed by their terms. Weather and UV information comes from Apple WeatherKit or fallback estimates. We are not responsible for third-party outages, acts, content, or independent data practices.

7. Feedback

If you send ideas, feature requests, or feedback, you grant SunSync a worldwide, perpetual, irrevocable, royalty-free right to use and incorporate it without compensation or obligation to you. Do not send confidential information through feedback channels.

8. Suspension and termination

You may stop using SunSync or delete your account at any time. We may suspend or terminate access if you materially violate these Terms, create risk or legal exposure, misuse the Services, or if continued operation is no longer commercially or technically feasible. Where reasonable, we will provide notice and an opportunity to address the issue. Terms that by their nature should survive termination will remain in effect.

9. Disclaimers

To the fullest extent permitted by law, the Services are provided "as is" and "as available." SunSync disclaims implied warranties of merchantability, fitness for a particular purpose, title, non-infringement, accuracy, and uninterrupted availability. We do not warrant that reminders will arrive, WeatherKit data will be accurate, or use of SunSync will prevent sunburn, skin damage, illness, injury, or any other outcome. Some jurisdictions do not allow certain warranty exclusions, so some exclusions may not apply.

10. Limitation of liability

To the fullest extent permitted by law, SunSync and its affiliates, licensors, and service providers will not be liable for indirect, incidental, special, consequential, exemplary, or punitive damages, or loss of data, profits, goodwill, or opportunity, arising from the Services. SunSync's total liability for claims relating to the Services will not exceed the greater of the amount you paid SunSync through the App Store during the 12 months before the claim or US $50. These limitations do not exclude liability that cannot legally be limited, including applicable consumer rights.

11. Indemnity

To the extent permitted by law, you agree to defend, indemnify, and hold SunSync harmless from claims, losses, and reasonable costs arising from your unlawful use of the Services, your violation of these Terms, or your infringement of another person's rights. This section does not apply where prohibited by consumer law.

12. Apple-specific terms

These Terms are between you and SunSync, not Apple. Apple is not responsible for the Services or their maintenance and support. If the app fails to conform to an applicable warranty, you may notify Apple, and Apple may refund the purchase price, if any, as required by its rules. SunSync, not Apple, is responsible for addressing claims concerning the app, including product-liability, legal-compliance, and intellectual-property claims. You represent that you are not located in a U.S.-embargoed country or on a U.S. prohibited or restricted parties list. You must comply with applicable third-party terms. Apple and its subsidiaries are third-party beneficiaries of these Terms and may enforce them. Apple's Standard Licensed Application End User License Agreement also applies and these Terms supplement it.

13. Governing law and disputes

These Terms are governed by California law, without regard to conflict-of-law rules, except where the law where you live requires otherwise. Before filing a claim, you and SunSync agree to try to resolve it informally for 30 days after written notice. Subject to mandatory consumer protections, disputes will be brought in the state or federal courts located in Ventura County, California. Nothing in these Terms limits rights you may have to bring a claim in your home jurisdiction or before a consumer-protection authority.

14. Changes and general terms

We may update these Terms to reflect changes to the Services, law, or business. We will post revised Terms with a new effective date and provide additional notice when required. If a provision is unenforceable, it will be limited to the minimum extent necessary and the rest will remain effective. Our failure to enforce a provision is not a waiver. You may not assign these Terms without our consent; we may assign them as part of a merger, reorganization, financing, or sale. These Terms and the Privacy Policy form the entire agreement concerning the Services, subject to applicable Apple terms.

15. Contact

Questions, notices, feedback, bug reports, and feature requests may be sent to SunSync@oscillara.dev.