Crimson Bible app icon — a crimson book embossed with a Jerusalem cross

Every feature, up close

Real screenshots from the app — private, offline Bible study with search that understands meaning.

Search that understands you

Ask in your own words, in your own language. The on-device AI reads the meaning of your question — no keywords required, no internet required — and every translation searches in its own language with the same multi-tier stack.

Search results for 'Jehová es mi pastor' in the Reina-Valera 1909 Spanish Bible, with Psalm 23:1 as the top hit
Español. “Jehová es mi pastor” in the Reina-Valera 1909 — the exact verse, Salmos 23:1, lands on top, with related passages right behind it.
Search results for 愛是恆久忍耐 in the Chinese Union Version (Traditional), showing 1 Corinthians 13 and related verses on love
中文(繁體). “愛是恆久忍耐” (love is patient) in the Chinese Union Version — 1 Corinthians 13 first, then verses that share the meaning: 1 Peter 4:8, John 15:13.
Search results for the question 'what does the Bible say about forgiveness' in the KJV
English. A whole question — “what does the Bible say about forgiveness” — answered with passages, not keyword matches.

Make it yours

Light, dark, and sepia themes — plus a system option that follows your device. Typography is yours too: text from 12 to 32 points, serif or sans-serif, three line spacings, and left or right alignment, with a live preview as you adjust.

Psalm 23 in the light theme
Light. Psalm 23, crisp and bright.
Psalm 23 in the dark theme
Dark. The same chapter, easy on the eyes at night.
Psalm 23 in the sepia theme
Sepia. A warm paper tone for long reading sessions.

Every setting, explained

No hidden switches, no mystery toggles. Here is the whole Settings screen, top to bottom.

Settings: reading mode, translation picker, and app language
Reading, translation & language. Choose chapter or continuous scrolling, switch between installed translations instantly, and set the app interface to English, Español, Português, 中文, العربية, or Filipino.
Settings: appearance theme, typography, and verse highlighting toggles
Language, appearance & typography. Set the interface language (English, Español, Português, 中文, العربية, Filipino), pick a theme, and tune font, size, spacing, and alignment with a live preview.
Settings: iCloud backup and About section with attributions
Verse highlighting, data & about. Toggle red letters (the words of Jesus) and blue letters (Old Testament quotations in the New). Notes and highlights ride your device's iCloud backup — the app itself never sees them — and every attribution is in the open.
Settings: the opt-in, local-only search log
Improve Search. An opt-in, local-only search log. Off by default, nothing is ever uploaded — you can export the JSON yourself or clear it any time.
Settings: Search Diagnostics showing every search component loaded and green
Search Diagnostics. Transparency as a feature: every component of the search stack — BM25, vector index, embedder, reranker, topics, cross-references — inspectable on your device, all green.

Built for study

Search is the front door; the study tools are the house.

Word study sheet showing Strong's concordance entries for a verse
Word study with Strong's. Tap any verse's word study to see its tagged words and original Hebrew or Greek — definitions included, offline.
Matthew 5 with the words of Jesus rendered in red
Red letters. The words of Jesus in red — here in the Sermon on the Mount. Old Testament quotations in the New can be marked too.
Arabic Smith & Van Dyke Bible in fully right-to-left continuous reading
Right-to-left Arabic. The Smith & Van Dyke translation with a fully right-to-left interface — not retrofitted, native.
Psalm 23:1 highlighted after tapping a search result
From result to context. Tap a search result and land in the chapter with the verse gently highlighted — you always know where you arrived and why.
Continuous reading mode scrolling straight through the Bible
Continuous reading. Read straight through without chapter breaks — the app remembers your read-through position separately from your study position.
Reading plans screen
Reading plans. Structured plans with daily progress tracking, entirely on-device.
Downloads screen with installed and available translations
Nine translations, your choice. KJV is built in; download the rest — Spanish, Portuguese, Chinese, Arabic, Tagalog — each with its own full offline search stack, and switch with one tap.
An honest empty state: no results found for a nonsense query
Honest when there's nothing. Gibberish gets “no results,” not a page of confident nonsense — search that would rather be quiet than wrong.