AdFontes.AI

Sit with the great Christian minds.

AdFontes.AI lets you put a question to Augustine, Aquinas, Calvin, Edwards, and dozens more — and read an answer grounded in what they actually wrote. Every response draws on a library of their own texts, with citations you can follow back to the source. Ad fontes: to the sources.

THREE WAYS TO READ

Chat — One-on-one with a single thinker. Ask about grace, suffering, prayer, the sacraments, doubt. Follow the thread as far as you want to take it.

Panel — Convene up to three voices at once and put the same question to all of them. Where they agree is interesting. Where they disagree is more interesting.

Study — Move through Scripture passage by passage with the historical commentary drawn up alongside the text.

GROUNDED, AND SHOWS ITS WORK

The answers are not improvised. They are built from a searchable library of the thinkers' own writings, and where a claim rests on a specific passage the app shows you the citation. You are always one tap from the actual text.

BUILT FOR READING

Light, sepia, dark, and OLED themes. Adjustable type size. Portrait or landscape, on iPhone and iPad. Your conversations, bookmarks, and study sessions sync to your account, so the thread you started on your phone is waiting on the web.

Quotations are marked and cited. Everything else is the model's reconstruction, and worth reading the way you would read a well-informed study partner: engage it, and check it.

FREE TO BEGIN

Fourteen days of full access to every mode and every voice, no card required. After that, Chat stays free with a daily message allowance. A paid plan lifts the limit and opens Panel and Study.

AdFontes.AI requires an account and an internet connection. You must be 18 or older.