Open Source Christian Apps and Projects

Armorer

A free, open-source minimalist KJV Bible web reader with infinite scroll, instant client-side keyword search, and verse-level deep links that focus and highlight specific passages — built by a software architect and church deacon who wanted a clean, distraction-free reading experience with no ads, accounts, or overhead. Web-only; stable and unchanged since the May 2026 cross-chapter copy fix.

LangQuest

An offline-first mobile app that enables native speakers to capture oral Bible translations and linguistic data by voice or text, collaborate with their community to validate translations, and contribute to a global open-access dataset. Built by Frontier R&D (Ryder Wishart, PhD Christian Theology, Founder & CEO) as part of a translation pipeline alongside Aquilla (formerly Codex). Available free on iOS and Android.

Scripture App Builder

Scripture App Builder is a free desktop tool from SIL Global that lets Bible translators create customized Android, iOS, and Progressive Web Apps with synchronized text and audio — no programming required. Over 2,500 apps in 1,960 languages with 65 million installs worldwide. Actively maintained with four major releases between April and July 2026 (v14.0–v14.3), including YouVersion Platform integration on both Android and iOS, direct Paratext and Scripture Burrito imports, devotional notes in reading plans, and Gloo AI as an optional faith-aligned guardrails provider for the AI Assistant.

B1 Church

Free, open-source church management platform with mobile app, website builder, digital giving, AI-powered admin search, Claude/ChatGPT MCP integration, check-in, attendance tracking, groups, worship planning, SMS texting, and multi-campus support — built by a Christian nonprofit serving 15,000+ churches worldwide across 30 languages. July 2026 added website templates, pledge campaigns, and event bookings with conflict detection. Formerly CHUMS, now unified as B1 Church.

Soul Rest

A free, open-source web platform aggregating 500+ Christian meditations and meditative prayers from 12+ creators — including Christ Centered Tribe, Encountering Peace, Alabaster Co, Rush Podcast, Dwell Bible App, VOUS Church, pray.com, Glorify App, Abide Christian Meditation, and Soulspace — with a Panic Button for immediate calm, random discovery, and topics spanning anxiety, sleep, healing, purity, and worship. Featured by the United Methodist Church. Content curated from YouTube, RSS feeds, and direct submissions.

fetch(bible)

A free, open-source Bible translations platform by Gracious Tech providing unrestricted access to 1,404 translations across 1,116 languages via CDN, with a TypeScript client (now v2.2.0), web enhancer (v1.1.0), and embeddable reader. MIT-0 licensed. Now powers five apps including Manna (gathermanna.com). Founder Jon Walsh maintains it part-time at 40% funding.

AndBible

A free, open-source Android Bible study app with 1,500+ documents in 700+ languages, Strong's concordance, split-screen commentary, an optional AI-powered study assistant (Gemini/Claude/OpenRouter), Document Sync across devices via Google Drive/Nextcloud, reading progress tracking, and community-driven development under Sykerö Software — no ads, no cost, no compromise. The iOS public beta is now live on TestFlight for iPhone, iPad, and Apple Silicon Macs.

LightNet - Media Library Kit

Open-source developer tool from OM (Operation Mobilisation) for building fast, static digital media libraries — now with CMS and analytics integrations — that help ministries share gospel-centered media in any language.

Track Bible

A free, privacy-focused Bible reading tracker that lets you tick off chapters at your own pace — no accounts, no ads, no data collection. Open-source progressive web app from Gracious Tech.

Codex Translation Editor

Free, open-source AI-powered desktop translation editor for lean teams working on Bible translation and other high-stakes, low-resource-language projects. Translators steer while 'Living Memory' learns their voice and decisions in real time, so each correction compounds across the project. Built by Frontier R&D (16-member team, co-founded by Ryder Wishart and Ben Scholtens) in partnership with Biblica and the ETEN Innovation Lab, available for macOS, Windows, and Linux.

Keep in Touch (kit)

An open-source platform for Christian creators to share project updates, capture email leads, and build in public — with shared faith.tools authentication, built-in blogging, RSS feeds, and AI content moderation. Still in beta; no new releases since March 2026.

BibleLink

BibleLink is a free, multilingual website plugin by GlobalRize that converts Bible references into hoverable links showing the verse text. Now supports 47 languages and 87+ active Bible translations, available as a WordPress plugin or lightweight JavaScript snippet, with v1.0.20 compatible with the latest WordPress releases.

The Bible Plugin

A free, open-source WordPress plugin that embeds a customizable Bible reader into any site, supporting 2,000+ translations via the Bible Brain API with Paratext file support in v2.0 (now available May 2026). Built by missionaries for global digital engagement — localized, strategic, and designed to keep seekers on your site.

Scribe Scripture

A free, open-source web app that helps you engage with Scripture by typing one chapter of Proverbs each day, cycling through all 31 chapters monthly — turning reading into active, tactile meditation on God's Word.

Stello

Stello is a free, open-source desktop app for sending secure and interactive newsletters. Built by a non-profit for workers in sensitive contexts, it encrypts messages on your device and lets recipients view rich, interactive updates in their browser — no accounts or apps needed.

Xiphos

Xiphos is a free, open-source Bible study application for Linux and Windows built on The SWORD Project, offering tabbed reading, fast indexed search, Strong's numbers, pseudo-interlinear display, commentaries, dictionaries, and access to 400+ Bible modules in 150+ languages. Actively developed since 2000 with 44 contributors and 257 GitHub stars; v4.4.0 released June 2026 restored the Linux editor and added devotional tabs and UI refinements.

Free Use Bible API

A free, open-source JSON API by AO Lab serving 1,256 Bible translations across 1,004 languages with no API keys, no usage limits, and no copyright restrictions — now with an official JavaScript/TypeScript SDK, commentary datasets, and a growing ecosystem of community integrations including MCP servers, an iOS Bible Atlas (Sacra Tabula), a Minecraft plugin, and a Roblox wrapper. 150 stars on GitHub, with API traffic nearly doubling to ~14 million hits/month as of July 2026.

BibleBoard

A free visual Bible study web app that lets you lay out verses, notes, interlinear Greek/Hebrew words, and worship plans on a shared canvas — built for visual learners, seminary students, and small group leaders who want to see how everything connects. Open-source backend, created by a Christian ML developer at Ontario Tech University.

Hai-End-Streaming

Open source Raspberry Pi-based livestreaming solution built by volunteers for church congregations, with 790+ active locations across Europe, a simple web interface anyone can operate, and active development through 2026.

YouVersion Platform Services

Free developer platform from the YouVersion/Life.Church team offering REST APIs and SDKs (Swift, Kotlin, JavaScript, React, React Native Expo, TypeScript), fast-track Bible licensing for 1,475 versions in 1,244 languages, AI Skills for coding agents, and an embeddable Bible Reader (now with server-backed highlights as of SDK 2.4.0). Currently running the Gloo "Scripture in New Frontiers" Summer Challenge (live July 2026) leading into the October 2026 Gloo AI Hackathon ($250K prize pool); launch partners include The Chosen and BibleProject. All at no cost to developers.

Ezra Bible App

A free, open-source Bible study app focused on topical study through keyword tagging, verse-based notes, Strong's Dictionary with morphological analysis, and Vine's Expository Dictionary — available on Windows, macOS, Linux, Android, iOS, and Chromebooks with hundreds of translations via SWORD modules, with automatic commentary translation in development.

Prayse

Prayse is a free, open-source prayer journal app that helps you organize prayers into folders, set customizable reminders (including monthly), journal your thoughts, add voice prayers, connect with other believers through prayer groups and biblical Q&A, and notify friends you're praying for them — available on iOS and Android.

Remember Me

Free, open-source Bible memory app by Swiss nonprofit Poimena — uses spaced repetition, interactive games, and group campaigns to help 2.2M+ believers memorize Scripture across 320+ translations in 48 languages. No ads, no cost, no limits. Actively maintained with frequent updates across Android (1M+ downloads), iOS, web, macOS, and Windows.

Harvous

A beautifully designed, open-source Bible notes app that helps you capture, organize, and revisit your Bible study with threads, automatic scripture text, and cross-referencing across 11 translations — now featuring a Recall memory layer, Easton's Bible dictionary, Daily Passage, and a native-like web shell. Built to complement your existing Bible app, with group study and AI connector add-ons on the roadmap.

Bible Strong

All-in-one Bible study app with Hebrew and Greek lexicons, chronological timeline, Nave's Topical Bible, commentaries, cross-references, audio Bibles, automatic backups, and full offline access with multilingual resources. Open source (GPL-3.0), built by solo French developer Stéphane Montlouis-Calixte (le studio 316) with 10,000+ daily users. Very actively maintained — last updated Jul 20, 2026 on both stores; GitHub last pushed Jul 20, 2026. Recent additions include automatic backups and Catholic canon (deuterocanonical) editions support.

Seed Bible by AO Lab

A free, open-source web platform by AO Lab (501c3) that turns Bible reading into a shared, real-time experience inside group chats and messaging apps. Following a 2026 refactor, it now features fast multiplayer sessions, a polished mobile UI, full-text search, immersive 3D reading, a live Discord bot, and live AI chat integration with the Apologist Project (GotQuestions, Kenboa, Apologetics Canada) — all powered by the Free Use Bible API (1,256 translations, 1,004 languages, 7M+ monthly hits). Coming soon: a Today screen, in-session group chat with AI agents, and an MCP server. No downloads, no paywalls, no ads.

Biblos

Biblos is a free, open-source semantic Bible search tool powered by BGE-large-en-v1.5 embeddings. Find passages by meaning, study Greek text with the Dodson Lexicon, read Church Fathers commentary, and follow a daily reading plan — all free with no sign-up.

GitHaven

Free, open-source Git hosting for Christian developers, running on a Gitea fork and actively maintained by Shiloh — a confessionally orthodox Christian tech company also behind Last Hour Hosting, Remnant Chat, the Touch Grass Show, and the annual Shiloh Echo family retreat in North Idaho.

Bible Reader

A free, open-source Bible reading plan tracker and PWA by Ethiopian developer Gadisa Teklu. Choose popular plans or create your own, track progress across all 66 books, and access from any device. Built with Next.js and Supabase.

Paper Bible

A free, open-source web tool by Gracious Tech for printing customized Scripture booklets in 800+ languages — at home or professionally. Founded by Jon Here in Sydney, Australia, it offers four one-click formats and deep layout customization for small groups, missions, personal study, or church handouts.

FreeShow

Free, open-source church presentation software for lyrics, scripture, and media — built by a nonprofit serving 14,764+ churches in 130+ countries. Recent releases add interactive polls/quizzes, a remote clicker, native tables and charts, and a companion mobile remote app for iOS and Android.

StudyChurch

A free web-based platform where small groups collaborate on Bible study lessons online — leaders build studies with embedded questions, members share answers and discuss before meeting in person, and churches manage all their groups from one dashboard.

Bolls Bible

A free, open-source, cross-platform Bible reading app offering 146 translations in 31 languages with bookmarks, parallel reading, cross-device sync, and customizable themes — built by a Ukrainian developer with a Sola Scriptura conviction, actively maintained with 592 commits and 128 GitHub stars, available on web, Android, Windows, and Linux.

Bible Bot

A free, open-source AI Christian companion on ChatGPT that helps you explore 100+ biblical topics, find verses, and dig deeper into Scripture — built with grace, truth, and an open-handed spirit. Featured in AP News (2026) and cited by Doxa as the reference framework for evaluating Christian AI apps.

Bible Vector Search

A free, open-source semantic Bible search tool that uses AI embeddings to find Scripture passages by meaning rather than keywords. Built on the BBE translation with a live public REST API for developers; part of the Antioch Tech project family by the creator of the Obsidian Bible Reference plugin. Web and API remain fully functional; core code is in stable/maintenance mode (no new commits since Sep 2024).

Last Hour Hosting

Christian-owned managed hosting, VPS, email, and cloud services by Shiloh LLC (CEO Tony Marsella) — open-source, privacy-focused, no-KYC with crypto and barter payment options, data centers in Iceland and Netherlands, ADF partnership, and real human support rooted in faith.

The Odin Project

A free, open-source full-stack web development curriculum with over 1.86 million learners. Covers HTML, CSS, JavaScript, React, Node.js, and Ruby on Rails through project-based learning and a 60,000+ member Discord community. Self-funded by donations via Open Collective since 2023. Curriculum GitHub repo has 12,700+ stars and was last updated July 2026.

Gertrude

Gertrude is an open-source parental control suite for Mac, iPhone, and iPad built by a Christian homeschool dad that takes a default-deny approach to internet filtering, with screenshot monitoring, keystroke logging, daily review reminders, a safe podcast app for kids (Gertrude Podcasts, formerly Gertrude AM), and an iOS app that blocks content loopholes Apple's Screen Time leaves open.

OpenFaith

Open-source, discipleship-first church management software with a universal sync engine for Planning Center and other ChMS platforms. Features a fast table-based interface, sacrament tracking, custom fields for all data types, and an AI-native architecture for natural language interaction with church data. Currently in alpha; the open-source repo has been dormant since October 2025 while the founder focuses on SteepleInc/church-work.

Disciple.Tools

A free, open-source WordPress CRM designed for disciple-making movements — track contacts, groups, baptisms, and church health with generational mapping, saturation heat maps, and unlimited users. Built by Gospel Ambition and deployed by IMB, 24:14, and missions teams worldwide, with an active monthly release cadence through July 2026 (latest v1.82.2).

Scripture Forge

A free, open-source web app by SIL International for collaborative Bible translation — featuring AI-powered draft generation (powered by the open-source Serval model, now used in nearly 500 projects worldwide), Paratext integration, and community checking tools that connect translation teams with language speakers across the globe, including an emerging oral Bible translation workflow. Currently v5.60.2 (July 2026).

Lessons.Church

Free, open-source church curriculum platform with 1,100+ video-based lessons for preschool through adult from 12+ providers. Built by ChurchApps (Live Church Solutions), now serving 15,000+ churches in 130+ countries with companion FreePlay TV app, presenter mode, comparison pages against paid alternatives, and no login required to browse.

Bolls Bible API

A free, open-source Bible API and reading platform offering 148 translations in 31 languages with endpoints for chapters, verses, search, version comparison, Hebrew/Greek dictionary definitions, and a Reference Tagging Tool — built by a Ukrainian developer with a Sola Scriptura conviction, actively maintained as of July 2026, available on web, Android, Windows, and Linux.

Parabible

A free, open-source, browser-based Bible study tool that lets you read and search the original Hebrew, Greek, and Aramaic texts with morphological parsing — built by James Cuénod, a PhD biblical scholar from South Africa who now serves as Senior AI Translation Technologist at Seed Company.

Gamaliel

Gamaliel is a free, open-source AI Bible reader that answers your Scripture questions with biblically grounded responses. No login needed, funded by ministry, with theological guardrails rooted in the Nicene Creed. Now available on iOS, Android, and the web, with a curated sermon video library from trusted ministries.

OpenTheo

A free, searchable archive of AI-transcribed Christian audio and video — over 10,000 hours of sermons, lectures, and podcasts from teachers like Steve Gregg, NT Wright, Mike Licona, and Stand to Reason. Interactive transcripts let you click any word to jump to that moment in the audio with real-time highlighting.

Obsidian Bible Reference Plugin

A free, open-source Obsidian plugin (MIT license) that lets you instantly look up and insert Bible verses into your notes — supporting multiple translations (WEB, KJV, NVI, CUV, DRB, UBG, BG, Korean, and Portuguese) across every platform Obsidian runs on. New in July 2026: offline Bible support with bundled WEB text and auto-fallback. 56k+ downloads, 67 contributors, actively maintained with a Bun monorepo architecture.

route.bible

A free, open-spec tool that turns Bible references into app-agnostic links and QR codes — letting anyone open a passage in their preferred Bible app or browser. Ships with a live Chrome extension that linkifies references across the web, and a Skills.sh agent skill (Bible Links) that teaches AI agents to emit portable route.bible Markdown links automatically.

Navigate The Way ✝️

Navigate The Way ✝️ is a free AI assistant for Scripture and theology, built on a conservative reformed evangelical foundation with an open-source AGPL-3.0 system prompt (version 20260318). Created by Ted Hallum of Ligonier Ministries, it uses AO Lab's Free Use Bible API for direct Scripture access and is now available exclusively on Apologist AI (GPT-5.4 Instant, no account required) after retiring its ChatGPT presence. The Berean Board small-group review game adds virtual buzzers, five age-tiered difficulty levels, and expanded file-format support. Very active GitHub: ~751 commits as of July 2026.

Bible Brain API

Bible Brain is the free developer API from Faith Comes By Hearing, offering REST endpoints for Bible text, audio, and video in 2,695 languages. Actively maintained with 21 GitHub repos (commits through July 2026) and comprehensive developer documentation. Free for non-commercial use. Ideal for building multilingual Scripture apps and websites.

Lumen

An open-source, AI-powered Bible study companion with an ESV reader, contextual AI copilot, personalized passage recommendations, reading progress tracking, testimony editor, and activity calendar — all in your browser. Built by an xAI engineer and in active development for over a year.

Bible MCP

An open-source MCP server that gives AI chatbots direct access to accurate, freely licensed Bible text — so Scripture is quoted, not hallucinated. Three tools (verse lookup, chapter fetch, translation browsing), strong uptime, and steady adoption across Claude Code, Claude.ai, and Cursor via Smithery.

Tov: a Bible without noise

A beautifully minimal, open-source, distraction-free Bible app for iOS featuring the Berean Standard Bible, 30,000+ cross-references, reading history, bookmarks, and offline access — completely free with no ads or paywalls. Built by Trent Cowden.

Rock RMS

Rock RMS is a free, open-source church management platform by Spark Development Network that handles people management, check-in, giving, communications, digital publishing, and engagement tracking — trusted by 10 of the 12 largest US churches, managing 35.4M+ people records, with AI Agents in preview (Community AI Summit July 2026), an active 5,000+ member community, Rock Cast at 217+ episodes, and the v19 generation actively shipping (v19.2 released June 2026).

Gospel Onchain

An open-source project that stored the entire KJV Bible directly on the Optimism blockchain — censorship-proof, immutable, and free to read. Built by a BuidlGuidl Ethereum developer, with a council voting system in development for community-verified Scripture preservation.

Here's My Church

A free, open-source interactive map of over 244,000 Christian churches across all 50 U.S. states, with attendance estimates, denomination filters, language tracking, per-state directory pages, and community-driven corrections.

Bible in One Scroll

A free, single-page walk through the Bible's storyline from Creation to Restoration that ends in the gospel, actively maintained on GitHub and available in more than 200 languages.