Last Updated: August 3, 2026
Welcome to Six Lines. By downloading, installing, or using the Six Lines mobile application (“the App”), you agree to these Terms of Service (“Terms”). If you do not agree, please do not use the App.
Six Lines is a reference and contemplative practice tool rooted in the I-Ching (易經), an ancient Chinese philosophical text. The App provides:
All content in Six Lines is intended for personal reflection and educational purposes only. Hexagram interpretations, almanac guidance, date recommendations, and AI-generated insights:
If you need professional guidance, please consult a qualified professional in the relevant field.
The App offers AI-assisted hexagram interpretations (“Gua” feature). These interpretations are generated by large language models and:
The Yao feature uses Apple’s on-device Foundation Models (available on iOS 26+) for conversational study of hexagram lines. All Yao processing occurs locally on your device. Yao responses are AI-generated and subject to the same limitations as any language model output.
The App offers an optional hand gesture casting feature that uses your device’s camera and on-device machine learning (MediaPipe) to recognize hand gestures for hexagram casting. When you use this feature:
The App has no subscription. Every oracle, reference and study feature — the hexagram reference, the almanac, Date Finder, casting, the Yilin verses, the journal, and the AI consultations — is available to every user at no cost. No feature is withheld pending payment.
AI consultations draw on a single pool of readings shared by all users and replenished each month. When the pool is spent, AI consultations pause until it refills; everything that does not require the cloud continues to work. We may change the size of the pool and how often it replenishes.
Some optional collections, such as The Records, are sold as one-time, non-consumable purchases. A collection is bought once and owned permanently, restores to your other devices, and never expires or renews. Collections are additional material; nothing in the oracle, reference, or study features depends on owning one.
You may optionally donate to replenish the shared pool. Donations are one-off purchases charged to your Apple ID at confirmation and managed by Apple’s App Store; they do not renew. A donation buys no private allowance, no additional features, and no priority — it adds to the pool that everyone draws from. Refunds are handled by Apple under its own policies. Donating is never required to use the App.
The App contains original content created by Six Lines, including:
The underlying I-Ching text is an ancient work in the public domain. Our original translations, commentary, artwork, and software are protected by copyright.
To the maximum extent permitted by law:
You agree not to:
We may update these Terms from time to time. Continued use of the App after changes constitutes acceptance. We will update the “Last Updated” date and, for material changes, notify users through the App or our website.
These Terms are governed by the laws of the Hong Kong Special Administrative Region, without regard to conflict of law principles.
If you have questions about these Terms, please contact us at:
Email: [email protected]
Website: sixlines.online
Six Lines: An ancient practice, a modern companion.