How does the quiz figure out my weak spots?

When you miss a question, RecallOS records the concept behind it — not just that one wording. Those concepts get prioritized and folded into your next daily Recall Run using spaced repetition, so your weak areas keep showing up until you own them.

Do questions I get wrong come back?

Yes. A good miss doesn't disappear — the concept resurfaces on a smart schedule in the coming days' runs. Because mastery attaches to the concept, it may return as a fresh scenario rather than the exact same question, which is closer to how the real exam works.

Can I make a quiz from my own class notes?

You can. Upload a PDF, slides, or a photo of your notes (up to 10 MB) and RecallOS turns them into a practice quiz — plus a summary, study guide, flashcards, or a concept map. Your first preview is free with no signup.

Is the daily quiz really free?

The daily Recall Run is free forever, and free users are never blocked from learning. There are optional paid tiers, Recall+ and Recall Pro, but they're purchased through Apple In-App Purchase in the iOS app — the website is for the free starter and info.

How long does the daily run take?

About five minutes for the 10-question core. Five earns the streak, ten opens the chest, and questions 11–15 are optional.

RecallOS was built by a practicing CRNA (nurse anesthetist), with a nursing- and NCLEX-first focus on active recall, spaced repetition, and honest, high-yield practice.

For nursing and NCLEX students who want a quiz that adapts to what they keep missing

A nursing quiz app that learns your weak spots

RecallOS is a nursing quiz app that pays attention. It watches where you slip, keeps those concepts on a short leash, and brings them back until they finally stick. You get a free daily Recall Run, instant rationales on every question, and the option to turn your own notes into a practice quiz — all with an NCLEX-style, nursing-first focus.

Try the free daily Recall Run Download on theApp Store

The problem

Most quiz apps hand you the same random pool every time, whether you already own a topic or keep whiffing on it. So you re-answer things you know cold and never circle back to the pharmacology or lab values that actually trip you up. Weak spots stay weak because nothing tracks them for you. A quiz that adapts should notice a good miss today and quietly put it in front of you tomorrow — before it costs you on exam day.

How RecallOS helps

It notices your misses

Every question you get wrong is a good miss, not a failure. RecallOS logs the concept behind it — not just the question — so it knows what to revisit.

Weak concepts come back

Your misses fold into the next day's Recall Run using spaced repetition, so a shaky topic reappears while it still matters and fades once you've truly got it.

Mastery lives at the concept

Because mastery attaches to the concept and not one worded question, owning an idea counts even when it shows up in a new scenario — the way it will on the exam.

Your notes become a quiz

Upload a lecture PDF, slides, or a photo of your notes and get a practice quiz built from your own material to drill alongside the daily run.

What you get

Weak-spot detection
RecallOS quietly tracks the concepts you miss and prioritizes them, so your review time lands on the material you haven't nailed yet instead of the stuff you already know.
Questions that return until mastered
Active recall plus spaced repetition means a missed concept resurfaces in tomorrow's run on a smart schedule — master it tomorrow, and the next day, until it's locked in.
The free daily Recall Run
A ~5-minute, 10-question core: streak credit after five and the Daily Chest after ten. A five-question Bonus Round is optional. Free forever.
Instant rationales
Every question comes with a clear why, right after you answer. No waiting to the end, no guessing what you got wrong — you learn in the moment of the miss.
Quizzes from your own notes
Upload notes, PDFs, slides, or photos (≤10 MB) and turn them into a practice quiz — plus a summary, study guide, flashcards, or concept map. One free preview, no signup.
A Recall Score that grows
Your Recall Score climbs as you study, and streaks, XP, gems, chests, weekly leagues, badges, and friend challenges keep the habit fun without ever faking your progress.

A realistic daily workflow

1Try the free starter run — five NCLEX-style questions, no signup, instant feedback on each.
2Start your free Daily Run: five questions earn the day, ten open the Daily Chest, and five bonus questions are optional.
3Miss one? Read the instant rationale, mark it a good miss, and keep moving — nothing punishes a wrong answer.
4Come back tomorrow and watch your weak concepts resurface in the run until they're mastered.
5Upload a tricky lecture's notes to spin up a focused practice quiz on exactly what's giving you trouble.

What RecallOS is (and isn't)

RecallOS is a study and practice tool, not a test bank that promises a score or a pass. Its question coverage is mapped to published nursing content domains and is meant to be educational, not exhaustive. Weak-spot review helps you focus, but it can't replace your coursework, clinicals, or faculty guidance. The daily Recall Run is free forever on the website starter and in the iOS app; paid tiers (Recall+ and Recall Pro) are optional and purchased through Apple In-App Purchase inside the app.

AI study aid — not medical advice

Generated by AI for educational use only. This is not medical, clinical, or professional advice and must not be used to make patient-care or treatment decisions. RecallOS is independent and not affiliated with, endorsed by, or sponsored by any board, certifying body, or licensing authority. Learn more

Frequently asked questions

How does the quiz figure out my weak spots?: When you miss a question, RecallOS records the concept behind it — not just that one wording. Those concepts get prioritized and folded into your next daily Recall Run using spaced repetition, so your weak areas keep showing up until you own them.
Do questions I get wrong come back?: Yes. A good miss doesn't disappear — the concept resurfaces on a smart schedule in the coming days' runs. Because mastery attaches to the concept, it may return as a fresh scenario rather than the exact same question, which is closer to how the real exam works.
Can I make a quiz from my own class notes?: You can. Upload a PDF, slides, or a photo of your notes (up to 10 MB) and RecallOS turns them into a practice quiz — plus a summary, study guide, flashcards, or a concept map. Your first preview is free with no signup.
Is the daily quiz really free?: The daily Recall Run is free forever, and free users are never blocked from learning. There are optional paid tiers, Recall+ and Recall Pro, but they're purchased through Apple In-App Purchase in the iOS app — the website is for the free starter and info.
How long does the daily run take?: About five minutes for the 10-question core. Five earns the streak, ten opens the chest, and questions 11–15 are optional.
Who built RecallOS?: RecallOS was built by a practicing CRNA (nurse anesthetist), with a nursing- and NCLEX-first focus on active recall, spaced repetition, and honest, high-yield practice.

Start today's Recall Run

The daily Recall Run is free, forever. A few minutes a day — warm up your brain and stay sharp.