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Nothing saved yet -- look for "+ Add note" under any passage's source material.
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Save any reply -- a sermon outline, a lesson, a study you want to come back to -- to a library you can revisit any time. A Pro feature.
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Nothing saved yet -- look for "Save as outline" under a reply worth keeping.
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Sources & licenses
"Back to the sources" means every claim here traces to something you can click. This page lists exactly what powers each part of ad fontes, and under what license — nothing here is generated or guessed by the AI; it's a fixed description of the underlying data and tools.
Bible translations
YouVersion Platform API — the Berean Standard Bible, King James Version, World English Bible, and American Standard Version, fetched live by reference and displayed under YouVersion's Platform Terms of Use. Never cached into a searchable index (see Full-text search below for why that's a separate, independently-sourced copy).
Original-language text, lexicons & cross-references
STEPBible-Data, created by STEPBible.org based on work at Tyndale House, Cambridge — CC BY 4.0. Backs the word-by-word Greek/Hebrew interlinear (Strong's numbers, transliteration, morphology), the lexicon search, and word-occurrence lookups. Parsed and re-formatted for display (word-by-word tables, keyword search over the lexicon glosses) — the underlying tagged text itself is unmodified from the source files.
Full-text search
The Berean Standard Bible's own full text, dedicated to the public domain (CC0) by its translation committee and fetched directly from its own distributor — deliberately not derived from the YouVersion API copy above, even though BSB is also one of the translations shown on-screen (see the README's Full-text search section for the licensing reasoning).
Commentary
Matthew Henry (Concise), Barnes' Notes, Jamieson-Fausset-Brown, Gill's Exposition, and the Geneva Study Bible — all public domain, fetched live per verse from biblehub.com. Always shown in its own clearly labeled block, separate from the AI's own words.
Cross-reference diagrams
openbible.info's cross-reference dataset — CC BY 4.0, ~345,000 verse-pair connections drawn primarily from the public-domain Treasury of Scripture Knowledge, each with a relevance score. A real, curated dataset someone else compiled — not a list of connections the AI thought of on its own.
Map diagrams
Place coordinates from openbible.info's Bible-Geocoding-Data (CC BY 4.0), each with a real, source-backed confidence score — a place is only ever marked "disputed" or "identified" based on that dataset's own evidence, never a guess. Base map coastline from Natural Earth (public domain, no attribution required).
The AI model
Claude (Anthropic) writes the conversational reply, decides which of the tools above to call for a given question, and never generates Bible text from its own memory — every verse shown to you comes verbatim from the sources above, by reference. Any text a reply presents as a direct quotation is additionally checked against the real, fetched translation text for that turn and flagged if it doesn't match (see the "Quote verified" note under a reply) — see Receipts Mode for exactly what that check does and doesn't prove.
Privacy & Terms
Last updated: [date]. ad fontes is operated by [your legal business name, or your own name if you're operating as an individual] ("we," "us"). This page covers both how we handle your data (Privacy Policy) and the terms you're agreeing to by using the site (Terms of Service).
What we collect
Using ad fontes without an account requires nothing from you -- chat messages and passage lookups aren't tied to your identity. Creating an account (via Supabase Auth) adds: your email address; your chosen answer depth and home-tradition preferences; the notes, saved outlines, and reading-plan progress you create; a log of the passages and topics Claude has gathered for you, so it can recall "you looked at this before" in a later conversation; your saved conversation history; and, only if you opt in, push-notification subscription details and a daily-digest email preference. If you subscribe, Stripe's own customer and subscription identifiers are stored against your account so we know your plan is active -- we never see or store your card number ourselves.
Who else sees it
A few outside services necessarily see parts of what you do here, each for exactly the purpose you'd expect: Anthropic processes your chat messages to generate Claude's replies; Supabase hosts the account database described above; Stripe processes payment and subscription billing if you subscribe; YouVersion and biblehub.com are called live, per request, to fetch the translation text and commentary shown to you (see Sources & Licenses for the full list and their own licenses); and, if you opt into either, [email sending provider] delivers the daily digest email and your browser's own push service (e.g. Google's or Apple's) delivers push notifications. None of these receive more than what's needed to do that one job, and we don't sell or rent your data to anyone, for any reason.
How long we keep it
Account data (notes, outlines, conversations, reading-plan progress, study history) is kept for as long as your account exists. You can delete individual notes and outlines yourself from the app; to delete your whole account and everything tied to it, contact [your contact email] and we'll remove it. An anonymous (signed-out) chat session is held only briefly in server memory to keep a conversation coherent, then discarded -- it's never written to the account database at all.
Children's privacy
ad fontes is not directed at children under 13, and we don't knowingly collect account information from anyone under that age. [Confirm this is accurate for your intended audience -- if you expect a meaningfully younger or school-aged audience, this section and your actual data practices need a closer look, possibly including COPPA compliance, before launch.]
Your choices
Daily digest email and reading-plan reminder pushes are both opt-in, off by default -- turning them on (and off again) is a setting inside the app, not something you need to ask us for. You can review, correct, or delete your own notes and outlines directly in the app at any time. For anything else -- exporting your data, deleting your account entirely, or a question about how any of this works -- contact [your contact email].
Using the AI responsibly
Claude's conversational replies are generated by an AI model, not written or reviewed by a person before you see them. Every direct Bible quotation is checked against the real fetched translation text for that turn (see the "Quote verified" note under a reply, and Receipts Mode for exactly what that does and doesn't prove) -- but the AI's own commentary, explanations, and theological framing can still be mistaken, incomplete, or reflect a particular tradition's reading more than it lets on. ad fontes is a study aid, not a substitute for your own reading, a pastor, a qualified counselor, or a theologian, and nothing here should be treated as professional, pastoral, legal, or medical advice.
Subscriptions & billing
Paid features are billed through Stripe on a recurring monthly or annual subscription, starting with a 14-day free trial on a card on file. You can cancel, change plans, or update your payment method at any time from the Subscription page, which hands off to Stripe's own secure Customer Portal -- we don't build or store your payment details ourselves. [Confirm your actual refund policy here -- e.g. whether a cancellation mid-trial or mid-period is refunded, prorated, or simply not re-billed going forward.]
Acceptable use
Don't use ad fontes to attempt to extract, scrape, or resell the underlying licensed data at scale (see Sources & Licenses for each source's own terms), to send abusive or illegal content through the chat interface, or to attempt to circumvent the per-account usage limits that keep the service available for everyone. We reserve the right to suspend or terminate accounts that violate this.
Changes to this page
If we materially change what we collect or how we use it, we'll update the date at the top of this page and, for a signed-in user, make a reasonable effort to let you know (e.g. in-app or by email) before the change takes effect.
Governing law & contact
These terms are governed by the laws of [your state/country], without regard to its conflict-of-laws rules. [Add any arbitration/dispute- resolution clause here if you want one -- not included by default.] Questions about this page, or about your data: [your contact email].