Android
Google Play · free · out now
- Tap the button below to open Google Play
- Tap Install
- Open Cornerstone and start reading
Free · Offline · No account
Cornerstone
Read the Bible. Learn the Faith.
A Catholic Bible companion with the full 73-book canon, Church Fathers commentary, Baltimore Catechism, daily quizzes, and guided audio devotions — the Rosary, the Divine Mercy Chaplet, the Angelus. And now Cat-echist, a cat scholar who answers your questions about the faith. No account required.
Now on Google Play
Now on the App Store
Plus free through Sept 30
Free on Google Play and the App Store — no account needed. Want early iPhone/Android builds? Join beta testing →
Your daily home
JUST ADDED
Meet Cat-echist
A cat scholar, answering as a Catholic scholar would.
A small white cat in a scholar's gown and biretta, gold spectacles perched on his nose, a book held to his chest.
Bring him your questions about the faith — why Catholics confess to a priest, what happens at the consecration, why we ask the saints to pray for us — and he will answer as a Catholic scholar would, citing Scripture and the Catechism.
You'll find him in the Learn tab. A few questions a day, no account required. He needs a connection to answer.
FEATURES
What’s in the app
Scripture, catechesis, and daily practice — offline by default.
Guided audio devotions
Pray the Rosary — all four sets of mysteries — plus the Divine Mercy Chaplet and the Angelus. A warm, unhurried voice leads every prayer, with the words on screen to follow.
Full Catholic Bible
73 books including the Deuterocanonicals — Douay-Rheims, CPDV, and WEB-CE, plus KJV.
Church Fathers
Commentary from Origen, Chrysostom, Augustine, and the Catena Aurea, on verses they wrote about.
Baltimore Catechism
Traditional teaching in structured lessons — formation or a refresher of the basics.
Reading plans & quiz
Day-by-day plans that track progress, plus a daily quiz on the faith, with streaks.
Faith journey
Earn XP from quizzes, lessons, and reading plans. Level up from Seeker to Saint.
Confession & prayers
Examination of conscience, walkthrough, and traditional prayers always at hand.
LIMITED TIME
Plus is free — through September 30
Every premium feature, unlocked for everyone through September 30. No purchase, no account, nothing to cancel.
$6.99/mo
→
Free
Unlimited lessons
No daily cap on Baltimore Catechism or Know Your Bible lessons — learn at your own pace.
Every Church Father
When a verse has commentary, every Father — not just the first. Origen, Chrysostom, Augustine, the Catena Aurea, and more.
Narrated Scripture
The default translation, read aloud chapter by chapter by a warm, unhurried voice — closer to a storyteller than to a phone reading text. Every book of the Catholic canon, ready for the commute or the end of the day.
Support the mission
Plus normally helps fund an independent Catholic app — right now it's simply a gift.
Annual plans are normally $49.99/year. Through September 30, just open the app — Plus is already unlocked, automatically, for every user.
DOWNLOAD
Two minutes to get in
Pick your phone. Short steps, one clear button.
iPhone
App Store · free · out now
- Tap the button below to open the App Store
- Tap Get
- Open Cornerstone and start reading
Start today
Cornerstone is free, made by Michael, an independent developer, for the Catholic faithful. Download it and read a chapter tonight.
“…built on the foundation of the apostles and prophets,
Christ Jesus himself being the chief cornerstone.”
— Ephesians 2:20