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Bible Utility Belt
Study app · BUB

Your complete toolkit
for Bible study

A text-first Bible study app. Every resource — text, commentary, lexicon, maps, genealogy — is bundled on-device. No internet connection required, ever.

Get it on Google Play Download for macOS Apple Silicon · .dmg — 181 MB Download for Windows Installer · .exe — 147 MB Windows Portable No install · .exe — 146 MB iPhone App Not yet available
🚫No fees 🚫No ads 👤No accounts 🔒No data collected 📵Works offline
Features

Everything in one place

Integrated study tools that work together, all bundled locally so they're available anywhere — in a cabin, on a plane, or anywhere else without internet.

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Bookmarks & Highlights

Bookmark verses and mark them with multi-color highlights that persist on your device. Large, easy-to-tap highlight colors make marking up a passage quick.

Bible reader with a highlighted verse
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Versions, Languages, Interlinear

Read in the Berean Standard Bible (default) or King James Version, with adjustable text size, previous / next chapter navigation, and a bilingual interlinear — tap any word to see the original Greek or Hebrew inline.

Interlinear Greek text below each word in John 1
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Verse Utility Belt

Select any verse to open a context panel: Strong's definitions, era-filtered commentary from 200+ Church Fathers and Reformers — Augustine, Calvin, Luther, Spurgeon — cross-references, and related classic hymns. Copy or share any verse.

Era-filtered commentary from John Chrysostom in the verse utility belt
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Full-Text Search & Cross-References

Search the full text of all of scripture, examine the original Hebrew or Greek with Strong's definitions, and trace ~340,000 cross-references linking related passages across the whole Bible.

Full-text search results across scripture
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Biblical Atlas

An interactive offline map of the Holy Land with ~700 geocoded biblical places — plus Paul's four missionary journeys as color-coded overlays. Tap a place name in the reader to jump straight to it on the map.

Interactive Holy-Land atlas with biblical places
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Genealogy

Explore the biblical family tree from Adam to Jesus, with ~3,500 named individuals — filterable by the line of Jesus, the twelve tribes, or the apostles. Tap a name in the text to see their entry, or "find in text" every verse they appear in.

Biblical family tree centered on Noah
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Reading Plans

Date-based reading schedules with checkbox progress tracking saved on your device. Follow a plan at your own pace — your progress is always remembered locally.

Reading plan with checkbox progress tracking
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Daily Reading Reminder

An optional daily "Read your bible!" notification that takes you straight to your reading-plan chapter — or wherever you last left off.

Daily 'Read your bible!' reminder notification
Principles

Built on a simple foundation

BUB is a personal project developed voluntarily, with no commercial interests attached. Every design decision flows from these commitments.

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Offline first

All Bible text, commentaries, lexicons, maps, and genealogy data are bundled on-device. The app functions fully with no network connection at all.

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Zero data collection

BUB collects no personal data, no usage analytics, and no crash reports. There are no accounts, no sign-ups, and nothing is ever sent anywhere.

$

Free, no ads

The app is free to install and free to use. There are no in-app purchases, no subscription tiers, no ads, and no paywalled content.

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Open source & public domain

Every library, Bible translation, commentary, lexicon, and dataset used in BUB is either open-source or public domain. Nothing is behind a proprietary license.

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Voluntarily developed

BUB is built and maintained as a personal hobby project by evanda. It exists because it's useful, not because there's money in it.

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Text-first

The app is designed for serious engagement with Scripture. The text is always central; every other feature is a tool to illuminate it.

Content

Built from the best open sources

Every piece of content in BUB is public domain or openly licensed. Here's what's bundled.

Bible Translations

Berean Standard Bible & KJV

The Berean Standard Bible is the default translation — a modern, readable English Bible dedicated to the public domain in 2023. Every BSB word is aligned to its Hebrew or Greek Strong's number, so tapping any word shows the original language definition instantly. The King James Version (1611) is also included and switchable at any time.

Commentary

200+ Church Fathers & Reformers

62,000+ entries from Augustine, Calvin, Luther, Matthew Henry, Spurgeon, Ryle, and many more.

Original Languages

Strong's Hebrew & Greek Lexicons

8,674 Hebrew + 5,624 Greek entries with definitions, etymology, and KJV usage. James Strong, 1890.

Cross-References

~340,000 verse pairs

Scripture cross-references from OpenBible.info (CC BY 4.0), linking related passages across the whole Bible.

Geography

~700 Geocoded Biblical Places

From OpenBible.info (CC BY 4.0). Every major city, mountain, river, and region — plotted on an interactive map.

Genealogy

~3,500 Biblical People

From the Theographic Bible Metadata project (CC BY-SA 4.0). Family relationships from Adam to Jesus and beyond.

Hymns

70 Classic Hymns

Scripture-indexed public-domain hymns (all pre-1928) from Watts, Wesley, Newton, Crosby, Luther, and others.

Feedback

Bugs & feature requests

BUB is in active development — bug reports and feature ideas are welcome.

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All feedback goes through GitHub Issues on the bub-feedback repo. You'll need a free GitHub account.

  1. Search existing issues — add a 👍 if yours is already there
  2. Click New issue and write a clear title
  3. Describe the problem or idea — screenshots encouraged
→ Open an issue on GitHub