Open Source Christian Apps and Projects

Bolls Bible

A free, open-source, cross-platform Bible reading app offering 146 translations in 31 languages with bookmarks, parallel reading, cross-device sync, vector/semantic search (added July 2026), dictionary lookup with Strong's numbers, offline downloads, and customizable themes — built by a Ukrainian developer with a Sola Scriptura conviction, actively maintained with 614 commits and 143 GitHub stars, available on web, Android, Windows, and Linux. The NIV is no longer offered after Biblica prohibited its use.

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 210+ languages.

Midvash Bible API

A free, open-source REST API for Bible text across 119 translations in 69 languages, with chapter, verse, range, batch, reference-parsing, and verse-of-the-day endpoints. It needs no key or signup, carries each version's attribution in its responses, and is part of the broader Midvash Bible reading platform led by theologian Neto Gregório.

Bible MCP

A free remote MCP server by Cameron Pak that lets AI assistants fetch verified Bible text from AO Lab's Free Use Bible API instead of inventing verses. Public source on Val Town; connect at https://bible-mcp.faith.tools/mcp.

Keep in Touch (kit)

An open-source launchpad for Christian creators to share in-progress work, capture email leads, and get promoted on faith.tools — with shared sign-in and AI spam moderation. Still in beta as a faith.tools experiment.

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 who serves as Senior AI Translation Technologist at Seed Company.

Track Bible

A free, private Bible reading tracker that lets you tick off chapters at your own pace in the browser. Open-source progressive web app from Gracious Tech, with no accounts, ads, or tracking.

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. Includes offline Bible support with bundled WEB text, verse of the day, Literal Word linking, and a fully offline link-only insertion mode. 58k+ downloads, 68 contributors, 120 releases, actively maintained, with the latest release in October 2026.

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. Its prompt has been substantially revised with explicit AI-identity, Scripture-accuracy, and crisis safeguards. Featured in AP News (2026) and cited by Doxa as a reference framework for evaluating Christian AI apps.

GitHaven

Free, open-source Git hosting for Christian developers, running on a Gitea fork and hosted 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. NOTE: the platform's own Gitea fork has not received a new commit since Aug 2024 (4 minor versions behind upstream); the service itself remains operational.

Lessons.Church

Free, open-source church curriculum platform with 1,175 video-based lessons across 199 studies for preschool through adult from 12 providers. Built by ChurchApps (Live Church Solutions), now serving 15,000+ churches. Summer 2026 added three new NextLevel adult studies (Discipleship, Evangelism, Zephaniah); companion FreePlay TV app, presenter mode, comparison pages against paid alternatives, and no login required to browse.

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 the Blue Letter Chronological daily reading plan — all free with no sign-up.

Gospel Onchain

An open-source project that stored the entire KJV Bible directly on the Optimism blockchain — censorship-resistant, immutable, and free to read. Built by a BuidlGuidl Ethereum developer; its first independent review (Learn of Christ, Aug 2026) affirms the engineering while noting it remains a niche, developer-oriented preservation experiment.

YouVersion Platform Services

Free developer platform from Life.Church's YouVersion team with REST APIs and SDKs for embedding licensed Bible text, Sign in with YouVersion, and an open-source reader. Use is non-commercial only: Scripture in your app must stay free to end users, with no paywalls, ads, or sponsorships. First partners include BibleProject and Come and See (The Chosen); installable AI Skills help coding agents use the APIs.

fetch(bible)

A free, open-source Bible translations platform by Gracious Tech that gives developers unrestricted CDN access to 1,464 translations across 1,150 languages, plus a TypeScript client, embeddable reader, and web enhancer. MIT-0 licensed, with no keys or rate limits.

Rock RMS

Rock RMS is a free, open-source church management platform from Spark Development Network covering people, check-in, giving, communications, digital publishing, and engagement pathways, with AI Agents that act inside a staff member's own permissions and MCP connections to Claude and ChatGPT.

bible-rs

Bible is a fast, native Bible reader for the Mac, written in Rust, with seven public-domain translations built in, instant full-text search, and highlights, notes, and bookmarks kept on your computer. The same reader also runs on the web. Free and open source.

Prayse

Prayse is a free prayer journal app by Sahag Arzoumanian that helps you organize requests into folders, set reminders, journal, read a daily verse, and pray with others through groups, shared prayer lists, and biblical questions, on iOS and Android.

Disciple.Tools

A free, open-source WordPress CRM for disciple-making movements: self-hosted contact, group, baptism, and church tracking with generational maps and saturation heat maps. Gospel Ambition stewards the project; field teams including the IMB use it, with community translation and an active open-source codebase. The native mobile apps are no longer in the App Store or Google Play; teams use it in a mobile browser.

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 across Android (1M+ downloads), iOS, web, macOS, and Windows; its newest release adds streaks, hands-free audio review, and a clearer New, Due, and Known verse flow, and it connects to Claude and ChatGPT via the Model Context Protocol for verse management by chat or voice.

A free, open-source JSON API for Bible verses and passages: look up typed references or precise passages in 17 public-domain translations, including the World English Bible and KJV, with no API key or signup. Built by Tim Morgan, with the code and open data on GitHub so anyone can self-host it.

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), Paratext integration, and community checking tools that connect translation teams with language speakers across the globe, including an emerging oral Bible translation workflow. More than 600 projects have been onboarded, and incremental draft generation was enabled for all projects in September 2026.

FreeShow

Free, open-source church presentation software for lyrics, scripture, and media, built by Live Church Solutions, a 501(c)(3). It runs on Windows, macOS, and Linux, with NDI output, cloud sync, and a companion remote for iOS and Android.

Bible Reader

A free, open-source Bible reading plan tracker and PWA by Gadisa Teklu. Choose popular plans or create your own, track progress across all 66 books, and access it from any device. Updated in September 2026 with a modernized interface; built with Next.js and Supabase.

Lumen

Lumen is an open-source web app for reading the Bible and asking an AI companion about Scripture. It pairs an in-browser reader with study tools and says AI should complement pastors and teachers, not replace them.

Harvous

An open-source Bible notes app that helps you capture, organize, and revisit your study, with a built-in Bible reader across 15 translations, threads that connect related notes, and Suggestions that resurface what you wrote. Free for personal study, with Harvous Plus for group spaces, review exercises, and a read-only AI connector, plus an invite-only church education platform.

Gertrude

Gertrude is an open-source family internet-safety suite for Mac, iPhone, and iPad built by a Christian homeschool dad. It defaults to blocking everything until a parent or accountability partner unlocks it, and includes Mac screenshot and keystroke monitoring, iOS Screen Time loophole blocking, a PIN-protected podcast app, and a parent-curated Apple Music player.

Paper Bible

A free, open-source web app from Gracious Tech for printing customized Scripture in over 1,000 languages — as a fold-at-home booklet or a file for a professional printer.

Armorer

A free, open-source minimalist King James Version Bible web reader with infinite scroll, in-browser search, verse-level deep links, and offline-first reading. Built by a church deacon who wanted a clean, ad-free reading experience with no account required.

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.

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.

The Odin Project

A free, open-source full-stack web development curriculum with more than 1.9 million learners. Covers HTML, CSS, JavaScript, React, Node.js, and Ruby on Rails through project-based learning and a Discord community. Self-funded by donations via Open Collective since 2023. Curriculum GitHub repo has 13,100+ stars and was last updated October 2026.

Bible Strong

Free, open-source Bible study app from Stéphane Montlouis-Calixte (le studio 316) with Hebrew and Greek lexicons and interlinear indexes, Nave's topics, commentaries, audio Bibles, and offline libraries. Actively developed on GitHub for iOS, Android, and the web, in English and French.

Stello

Stello is a free, open-source desktop app for sending secure and interactive newsletters. It encrypts messages on your device and lets recipients view rich updates in their browser — no accounts or extra apps needed.

Codex Translation Editor

Free, open-source AI-assisted desktop translation editor for Bible and other high-stakes, low-resource-language work. Translators stay in authority while Living Memory learns their voice; Frontier R&D also offers Aquilla, a web successor, while this macOS, Windows, and Linux app stays in active development.

LangQuest

Free, offline-first mobile app for oral Bible translation in underserved languages. Native speakers capture Scripture, stories, and songs by voice or text, validate translations through community voting, and sync when connectivity returns. Built by Frontier R&D (Ryder Wishart, PhD) as the data-collection half of a translation pipeline with Aquilla. Community members have contributed over 319,000 clips across 290 projects and 286 language profiles. Note: the GitHub repo is public but contains no LICENSE file; the website claims MIT.

AndBible

AndBible is a free, open-source Bible study app for Android and iPhone, with split-screen commentary, Strong's word study, a large offline SWORD library, and an optional AI assistant - no ads and no subscription. It left TestFlight and launched on the App Store in September 2026.

Scribe Scripture

Scribe Scripture is a web experiment by Cam Pak for memorizing Proverbs by typing one chapter each day as the calendar turns. The Berean Standard Bible text loads in the browser; there is no official native app for this tool.

Bible Vector Search

A free, open-source semantic Bible search tool that uses AI embeddings to find Scripture passages by meaning rather than keywords, with a live public REST API (BBE translation) for developers. Web app and API remain fully functional and moved in October 2026 from bible-search.antioch.tech to antiochtech-bible-search.bai.uno, on the creator's own domain; creator Tim actively maintains sibling Antioch Tech projects, including a new Obsidian Bible Reference release in October 2026.

Hai-End-Streaming

Open source Raspberry Pi livestreaming server that volunteer developers built so congregations can send RTMP and receive HLS worship streams, with a simple web console and fleet tools for larger church rollouts.

Seed Bible by AO Lab

A free web platform from AO Lab for shared Bible reading in group chats and the browser, with no download, account, ads, or fees. Ministries can white-label it and place teaching beside Scripture, and AO Lab also runs a key-free Free Use Bible API with more than 1,200 translations.

B1 Church

Free, open-source church management platform with a member progressive web app (the native iOS and Android app is deprecated), website builder and templates, digital giving, check-in, AI-powered admin search, Claude/ChatGPT MCP integration, workflows, QR guest registration, built-in blog, rooms and resources booking, and multi-campus support — built by a Christian nonprofit serving 15,000+ churches in 30 languages. Formerly CHUMS, redesigned 2026 with a new comparison hub vs Planning Center, Pushpay, Tithe.ly, and Breeze.

Bolls Bible API

A free, open-source Bible API and reading platform offering 146+ translations in 31 languages with endpoints for chapters, verses, search (including vector/semantic search added July 2026), 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 October 2026, available on web, Android, Windows, and Linux.

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 Scripture served directly from Paratext files since v2.0. Built by missionaries for global digital engagement — localized, strategic, and designed to keep seekers on your site.

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, with an official JavaScript/TypeScript SDK, commentary and dataset endpoints, bulk downloads for offline use, and a growing ecosystem of community integrations including MCP servers, an iOS Bible Atlas (Sacra Tabula), a Minecraft plugin, and a Roblox wrapper.

Xiphos

Xiphos is a free, open-source Bible study application for Linux, UNIX, and Windows, built on The SWORD Project, with tabbed reading, a module manager, fast indexed search, Strong's and morphology display, commentaries, dictionaries, maps, and read-aloud. Windows users get an installer; Linux users typically install through their distribution or Flathub.

LightNet - Media Library Kit

Open-source developer tool from OM's MediaWorks team for building fast, static digital media libraries that help ministries share gospel-centered media in any language. Eight libraries are now online, and more ministry teams are exploring it.

Bible SuperSearch API

A free, open-source JSON API from Preserved Word Ministries for Bible passage lookup and full-text search across 91 Bible modules in 51 languages, with Strong's-number editions. Hosted use is free for non-commercial purposes, capped at 1,000 hits per day; the same API can be self-installed with no usage limits.

Ezra Bible App

A free, open-source Bible study app for topical tagging, verse notes, Strong's and commentary study, and CrossWire SWORD translations on desktop and mobile.

FreePlay

A free TV app for churches: connect a curriculum provider, download lesson videos ahead of time with one click, and play them in class with the TV remote, with everything working offline after download. Built for Apple TV, Fire TV, and Android TV.

BibleLink

BibleLink is a free, multilingual website plugin by GlobalRize that converts Bible references into hoverable links showing the verse text. It supports 47 languages, with 89 Bible translations listed, is available as a WordPress plugin or lightweight JavaScript snippet, and in October 2026 moved its default English ESV text to the ESV 2025 edition.