If you've ever wished for a Bible study app that was exclusively Reformed, completely free, and genuinely easy to use — Relight is the answer to that prayer. Built for anyone who wants to dig into Scripture alongside the great Reformed confessions and commentaries without navigating a maze of menus or spending a dime.[^1]
Relight is a web app featuring the KJV and ESV translations, the Greek New Testament (Scrivener 1894 with Strong's tags and morphology), and the Hebrew Old Testament. Commentaries include John Calvin, Matthew Henry, Matthew Poole, Charles Hodge, and the Geneva Bible Notes. It also includes the full Westminster Standards, the 1689 London Baptist Confession, the Belgic Confession, the Heidelberg Catechism, the Canons of Dort, Keach's Catechism, the Abstract of Principles, Calvin's Institutes, Robert Shaw's Exposition of the Westminster Confession, R.C. Sproul's The Prayer of the Lord, and more. What makes it stand out is its in-line study system: tap a lightbulb icon on any verse, catechism question, or confession article, and cross-references, commentaries, word studies, and backlinks appear right where you're reading — no tabs, no panes, no friction.[^2]
Relight was born in 2017 on Lord's Day walks between David and Sarah Mikucki, a husband-and-wife team of confessionally Reformed Presbyterians and members of the RPCNA. David taught himself web development to build it, and the couple launched the app in fall 2018 with just the KJV and a set of cross-references. It has grown steadily since, with the most recent release in March 2025.[^3]
Why Christians Love It"My favourite (free and Reformed!) Bible study app... It's very user friendly (works great on smartphones and PC) and focuses on Reformed resources." — Reddit user, r/Reformed[^4]
"For a browser based option, you can check out the Relight app. It has several commentaries and translations including the ESV. It looks pretty good." — Redeemed Ronin, The Puritan Board[^5]
"I highly recommend using Relight App. You can check commentaries as you read. Matthew Henry's is especially useful for devotional reading." — Reddit user, r/Reformed[^6]
Notable- Featured in The Reformed Presbyterian Witness (September/October 2023) in a profile piece on David and Sarah[^3]
- David Mikucki was interviewed on The Blue Banter podcast (February 2025)[^7]
- Listed as a recommended Bible study resource by Reformed Spirituality[^8]
- Active community forum at relight.chat with 260+ topics — David responds to bug reports and feature requests personally[^9]
- The same team is building Relight Audio (relightaudio.app), a companion app turning classic Reformed books into audiobooks using AI narration; planned as a separate iOS app with 15 hours of free content[^10]
- Relight is planned to be renamed "Relight Study" to distinguish it from the upcoming audio app[^10]
- Accepts voluntary donations but will never paywall core features or public domain resources[^11]
