A Catholic development studio

Grow in holiness.
Draw closer to God.

HolyStack creates free Catholic apps and open projects to support prayer, growth in holiness, and a deeper relationship with God through Scripture and the sacramental life.

Explore the projects
Rooted in the Catholic faith

From the studio

Our projects

View all projects
Metanoia examination of conscience with Quick Review questions and selected notes

Metanoia

iOS & Android

Prepare for confession, reflect with the Daily Examen and keep a private journal. A companion for the Sacrament of Reconciliation and daily prayer.

  • Confession
  • Daily Examen
  • 14 languages
Explore Metanoia
The full Shema device, including its round touchscreen, speaker enclosure and USB ports

Shema

Offline audio Bible

Listen to Scripture on a device of its own. Browse Bible chapters, follow Bible in a Year, and add your own recordings of prayers, music and talks.

  • Bible chapters
  • Audio library
  • Open firmware
Explore Shema

Further projects are in development. We’ll share them here when they’re ready.

Faith & the work

In the life
of the Church.

HolyStack is rooted in the Catholic faith. We seek to draw closer to our heavenly Father through Jesus Christ, guided by the Holy Spirit. Prayer, Scripture and the sacramental life shape what we build.

The projects grow from practices in our own lives: preparing for confession, reflecting on a day, and making time to listen to the Word of God.

We share the code for others to read, contribute to and build upon.

Explore the source

Free to use

Our apps and firmware are free, without ads or subscriptions. Shema uses hardware you supply.

On your device

Metanoia’s personal entries and Shema’s listening history stay on the device. Neither requires an account.

Open to contribution

Code, translations, bug reports and practical suggestions are welcome.

Get in touch

Prayer to Saint Michael

Saint Michael the Archangel, defend us in battle.

Be our protection against the wickedness and snares of the devil.

May God rebuke him, we humbly pray; and do thou, O Prince of the heavenly host, by the power of God, cast into hell Satan and all the evil spirits who prowl about the world seeking the ruin of souls.

Amen.

Hail Mary

Hail Mary, full of grace, the Lord is with thee.

Blessed art thou among women, and blessed is the fruit of thy womb, Jesus.

Holy Mary, Mother of God, pray for us sinners, now and at the hour of our death.

Amen.