Scripture Memory, Large Print
Public-domain KJV · no ads · verses always free
How this app spaces a verse you are learning
Scripture Memory, Large Print uses SuperMemo 2 (SM-2), a published spaced-repetition method, on King James verses. The words are always free to read. This page describes the schedule the app actually uses, not a new method we invented.
Why a schedule at all
If you only reread a verse on the day you first looked at it, it fades. If you reread every verse every day, the pile grows until the work is unpleasant. Spaced repetition puts a longer gap after a verse you recalled, and a short gap after a verse you missed. SM-2, published by Piotr Wozniak in the late 1980s and widely described since, is one standard way to choose those gaps. Our app implements that method; it is not a medical treatment and it does not claim a particular exam result.
The schedule, as the app codes it
Each verse card has an easiness factor (starting at 2.5), a repetition count, and an interval in whole days. Dates are civil days, not clock times — a review due on a Thursday is due that day, not at a particular hour. When you review:
- The app treats a first-time correct answer as quality 5, and a miss as quality 1, on SM-2’s 0–5 quality scale.
- If the quality is below 3 (a miss), the repetition count is reset, the interval becomes 1 day, and a lapse is recorded. The easiness factor is left as it was.
- If the review is a success (quality 3 or more): a card with no successful reviews yet is due again in 1 day; after a second success the interval is 6 days; after that, the new interval is the previous interval multiplied by the easiness factor, rounded, and kept between 1 and 365 days.
- After a success, easiness is updated with the usual SM-2 formula: EF′ = EF + (0.1 − (5 − q) × (0.08 + (5 − q) × 0.02)), and is never allowed to fall below 1.3.
- The next due date is today plus the new interval, on the civil calendar.
A worked first-success path: you recall a new verse today (quality 5). It is due tomorrow. You recall it again tomorrow. It is due six days after that. A later success at EF 2.5 would stretch a 6-day interval to 15 days (6 × 2.5 = 15), and so on, until a miss brings it back to 1 day.
This is the same logic as sm2.dart in the app (interval 1, then 6, then interval × EF, EF starting at 2.5, minimum 1.3, interval clamped at 365 days). It follows the published SM-2 outline; we are not claiming a trademark, and we are not selling SuperMemo’s software.
What is always free
The verse text is the King James Version, which is in the public domain. The app does not use NIV, ESV, NKJV or NLT. Reading is unlimited and is never locked behind a payment. The free web practice at /learn/ is US$ 0 / KSh 0 and uses the same public-domain wording (John 3:16 is first on that page).
On the free Android plan, memory reviews (“I knew it” / “Not yet”) are capped at 15 a day. Optional Pro is about US$ 2.99 a month (about KSh 388) or about US$ 24.99 lifetime (about KSh 3,246); KSh at 129.91 = US$ 1, Central Bank of Kenya, 6 November 2026, illustrative; Google Play sets the charged price. There are no ads. Google Play: coming soon.
Questions
Which Bible translation is this?
The King James Version, public domain. Verse text is not locked behind Pro.
What happens when I miss a verse?
The interval goes back to 1 day and the repetition count resets. The easiness factor is not reduced on a miss in this implementation.
Is this a medical or exam claim?
No. It is a review schedule.