How Lernix Knows When to Remind You to Review

For most people, forgetting is not a discipline problem. It is just how memory works. You understand something today, feel confident tonight, and a few days later it is gone.

That is why we added a new review reminder system in Lernix. Instead of asking you to repeat everything every day, Lernix now estimates when each question is most likely to need another look, then reminds you when there is actually something worth reviewing.

The big idea: less brute force, better timing

Our goal is simple: help you review right before a memory fades, not long after it disappears.

This is different from a fixed routine like “review every day” or “study this folder every Friday.” In Lernix, each question gets its own rhythm. Easy items can wait longer. Difficult items come back sooner. That means your time goes to weak spots instead of endless repetition.

The science behind it

The new system is based on SM-2, one of the classic spaced repetition algorithms. If you have used serious flashcard systems before, you have probably seen the same idea in action.

The logic is grounded in a basic finding from memory research: people retain more when they review information at increasing intervals, especially when the review happens close to the point where they would otherwise forget it.

In plain language: not too soon, not too late.

What Lernix tracks for every question

Behind the scenes, Lernix keeps a small memory state for each question you practice:

• repetitions: how many successful review cycles this question has already survived
• intervalDays: how many days Lernix should wait before showing it again
• easeFactor: how easy or difficult this question seems for you over time
• dueAt: the next date when the question becomes due

This happens question by question, not document by document. If you are strong on 8 cards but shaky on 2, Lernix does not treat them as the same.

How the next review date is calculated

The rule is intentionally practical:

• If you answer a question correctly for the first time, it usually comes back the next day.
• If you get it right again, the interval jumps to 6 days.
• After that, the interval grows by multiplying the current gap by the question’s ease factor.
• If you get a question wrong, Lernix resets it to a short interval and lowers the ease factor a bit, so it returns sooner next time.

A simplified example looks like this:

• First good answer: review tomorrow
• Second good answer: review in 6 days
• Third good answer: maybe 15 or 16 days later
• Wrong answer after that: back to a 1-day interval

So the schedule keeps stretching when recall is solid and tightening when recall starts to slip.

Your result shapes the schedule (without extra effort)

You do not need to think in terms of numbers, but the system does.

Each time you practice, Lernix records a small “quality” signal (0 to 5) that represents how well that question went. Higher quality grows the interval faster. Lower quality brings it back sooner.

If you do not send an explicit quality score, Lernix still has enough information to do the right thing. We map common outcomes like:

• mastered: you know it cold
• correct: you got it right
• review: you got it, but want to see it again soon
• wrong: it did not stick yet

That way, the schedule adapts even when you are just studying normally.

How reminders stay useful instead of annoying

A reminder is only helpful when it matches a real study need. So Lernix does not send practice notifications blindly.

The reminder logic checks three things:

• you have questions that are already due
• you have not practiced yet today
• it is time to deliver the reminder in your own time zone

Right now, daily reminders are scheduled for 7:00 PM local time. If you finish practice before that notification is delivered, Lernix will try to cancel the scheduled reminder. The system also deduplicates reminders so you do not get the same nudge again and again on the same local day.

In other words, this is not “more notifications.” It is better timing.

What you will feel as a learner

For everyday users, the benefit is straightforward:

• less last-minute cramming
• fewer pointless repeats on material you already know
• faster return to questions you are close to forgetting
• a review queue that feels manageable instead of endless

Mixed practice follows the same logic. Due questions are prioritized first, then new questions, and only then future questions. So when Lernix tells you it is a good time to review, it is usually pointing you toward the items that matter most now.

If you tap the reminder, you jump straight into mixed practice. Most days, you can clear the due queue in just a few minutes and move on with your evening.

Not a black box, not magic

We do use smart logic, but we do not want to pretend this is mysterious AI magic. The real win is that Lernix applies a proven memory pattern automatically, question by question, in the background.

You keep studying. The system handles the timing.

If you have ever thought, “I know I should review, I just never know when,” this update is for you.