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, and the Hebrew Old Testament, along with commentaries from John Calvin, Matthew Henry, Matthew Poole, and Charles Hodge. It also includes the Westminster Standards, the 1689 London Baptist Confession, the Heidelberg Catechism, the Canons of Dort, Calvin's Institutes, 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, 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 then.^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
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)^6
- Exhibited at the Ligonier National Conference^3
- The same team is building Relight Audio (relightaudio.app), a companion project turning classic Reformed books into audiobooks using AI narration^7
- Community feedback board at relight.chat and an active development blog at relight.blog^8
- Accepts voluntary donations but will never paywall core features or public domain resources^9
