Understand faster.
Remember longer.
Read and take notes to process your lectures, then lock them in with the two study techniques backed by the strongest evidence: testing yourself and spaced review.
For students, by students. No credit card required.
One simple loop,
from lecture to long-term memory.
Read, highlight, take notes
Import your lecture PDFs and process them your way. When something doesn't click, get an explanation right where you're reading.
Test yourself, don't re-read
Quiz yourself on exactly what you just studied. Recalling an answer strengthens memory far more than reading it again - re-reading only feels like it works.
Review right on time
Turn any highlight into a flashcard with one tap. Reviews are scheduled so each card comes back just before you'd forget it - minutes a day instead of cramming.
Stay on top of the semester
Assignments, deadlines, and focus sessions live alongside your notes, so planning your week doesn't need another app.
Built on evidence, not study hacks.
Every part of the loop maps to a finding that has held up for decades. Nothing exotic - just the techniques that work, made effortless.
Testing beats re-reading
In controlled studies, students who practiced recalling material remembered substantially more a week later than students who re-read it - even though re-reading felt more effective.
Roediger & Karpicke, Psychological Science (2006)
Spacing beats cramming
Memory fades on a predictable curve, and reviewing just before you forget flattens it. The spacing effect is one of the most replicated findings in learning research.
Ebbinghaus (1885); Cepeda et al. (2006)
The two highest-rated techniques
A landmark review of ten popular study techniques rated only two as high utility: practice testing and spaced practice. They're the core of Student OS.
Dunlosky et al., Psychological Science in the Public Interest (2013)
AI-assisted study, without the noise.
Unlike generic chatbots, Student OS integrates AI exactly where you need it - explaining a dense passage, drafting a flashcard, checking your answers. You stay in control: nothing is generated unless you ask for it.
- One-tap flashcards from your highlights and notes
- Explanations grounded in your own materials
- Tests scored to feed your review schedule
Make this the last semester you cram.
Set up in minutes. Import a lecture, start the loop, and let the reviews come to you.
Get started - it's free