Privacy Policy
Last updated: October 6, 2026
Yellow Sun Systems LLC ("we," "our," or "us") operates the following services covered by this policy:
- DreamZone (dreamzone.app) — a personal dream journal with AI analysis
- The Writing Sessions (the-writing-sessions.yellowsunsystems.com) — a creative writing tool
Some of our apps have their own dedicated privacy policy because their goals and data-handling model differ materially from this umbrella policy. Where an app has its own policy, that policy governs and this document does not apply to it. The apps with their own policies are:
- Monaco — browser-only retirement scenario simulator
- Retire Slider — one-screen retirement planner (web and iOS)
- Step Right — iPhone step tracker using Apple Health
- Solitaire — classic card game (web and iOS)
Each of those apps runs on your own device and does not send your content to us. You can also reach an app's policy from its page on this site.
1. Information We Collect
Account Information
When you sign in to one of our services (e.g., via Google Sign-In on DreamZone), we receive and store:
- Your account ID (internal identifier from the sign-in provider)
- Email address
- Display name
- Profile picture URL
Content You Create
Depending on the service, you may provide:
- DreamZone: Dream titles, descriptions, dates, mood, lucid dream status, and tags
- The Writing Sessions: Writing session content and related metadata
AI-Generated Analysis (DreamZone only)
When you choose to analyze a dream in DreamZone, the dream title and description are sent to a third-party AI service (Anthropic) to generate an interpretation. The resulting analysis is stored alongside your dream. See Section 4 for details.
Book Mailing Lists
Our author pages on yellowsunpress.com and the Yellow Sun Classics and Yellow Sun Guides sites let you join a mailing list. When you do, we store the email address you enter, the name you give (optional), which author or imprint list you joined, and the date. We use it only to email you about new titles from that author or imprint. Every email we send will include a way to unsubscribe, and you can also ask us to remove you at any time by writing to privacy@yellowsunsystems.com. We never sell or share mailing-list addresses.
2. How We Use Your Information
- Authentication: Your account information is used solely to identify you and maintain your session.
- Service features: Your content is stored to provide the core features of each service (journaling, search, analysis, writing sessions, etc.).
- We do not sell, rent, or share your personal information with third parties for marketing purposes.
- We do not use your content to train AI models.
3. Data Storage and Security
- Your data is stored in databases on servers hosted in the United States.
- All connections to our services are encrypted via HTTPS/TLS.
- Authentication sessions use signed, HTTP-only cookies that cannot be accessed by client-side scripts.
- Each user's data is isolated; you can only access your own content.
4. Third-Party AI Processing (DreamZone)
When you explicitly request AI analysis of a dream in DreamZone, the dream's title and description are sent to Anthropic (anthropic.com) via their API. Important details:
- Data is sent only when you click the "Analyze" button and confirm the consent prompt.
- We do not send your email, name, or any identifying information to Anthropic — only the dream text.
- Anthropic processes your dream text solely to generate the analysis response. Under Anthropic's API data policy, API inputs and outputs are not used to train their models and are retained for a maximum of 30 days for trust and safety purposes, after which they are deleted.
- You can review Anthropic's full privacy practices at anthropic.com/policies/privacy.
5. Your Rights
For the services covered by this policy, you have the right to:
- Access your data: Export all your data at any time from within the service.
- Delete your content: Remove any individual entries you have created.
- Delete your account: Permanently delete your account and all associated data. This action is irreversible.
- Withdraw consent: You can stop using optional features (such as AI analysis) at any time.
California residents (CCPA / CPRA). Yellow Sun Systems LLC does not sell or share personal information for purposes of the California Consumer Privacy Act (Cal. Civ. Code § 1798.100 et seq.) as amended by the California Privacy Rights Act. See Do Not Sell or Share My Personal Information. California residents may also request to know, delete, correct, and limit the use of sensitive personal information — contact privacy@yellowsunsystems.com.
EEA / UK residents (GDPR / UK GDPR). For the services covered by this policy, Yellow Sun Systems LLC is the data controller and the lawful basis is the contract you accept by signing in (GDPR Art. 6(1)(b)) and your explicit consent for AI processing (GDPR Art. 6(1)(a)). You have the rights of access, rectification, erasure, restriction, portability, and objection (GDPR Arts. 15–21), and the right to lodge a complaint with your local supervisory authority (GDPR Art. 77).
6. Cookies
DreamZone and The Writing Sessions use only strictly necessary session cookies for authentication (HTTP-only, secure, 7-day expiry). The Yellow Sun Systems LLC marketing site (yellowsunsystems.com) sets no cookies for visitors and loads no third-party tracking scripts. The only exception is a strictly necessary sign-in cookie used by our own staff to reach administrative pages; visitors never receive it. We do not use advertising cookies, analytics cookies, or fingerprinting techniques anywhere on our properties covered by this policy.
7. Children's Privacy
The services covered by this policy are not directed at children under 13, and we do not knowingly collect personal information from children under 13. If you believe a minor has provided us with personal information, please contact us so we can delete it.
8. Changes to This Policy
We may update this Privacy Policy from time to time. We will notify users of material changes by updating the "Last updated" date at the top of this page.
9. Contact
If you have questions about this Privacy Policy or wish to exercise your data rights, contact us at: privacy@yellowsunsystems.com