Semestra7 days of Premium, free — no card required
Your whole semester, finally under control.
Semestra is your personal AI study companion — it teaches you, gets you ready for class, and helps you retain what you learn, all while organizing your whole semester and building better study habits.
Everything in one place
Your personal AI companion, not just a planner
Lessons from anything
Turn any document, slide deck, article or YouTube lecture into a clear, readable lesson in seconds.
Quizzes that make it stick
Every lesson comes with a quiz drawn straight from your material, so you actually remember it.
Study groups
Share lessons and quizzes, compare on a leaderboard, and keep each other on track.
Insights & focus
See where your attention actually goes across your courses and spot what needs work.
Streaks that fit real life
Build a study habit without being punished for taking the weekend off.
Everywhere, in sync
Start on your laptop, finish on your phone. Everything stays synced across web and mobile.
Made for students like you
Grades up. Stress down.
“The lesson summaries and quizzes make everything actually stick. I remember far more from my courses now than I ever did cramming the night before.”
“For the first time I feel organized. Every class, deadline and exam lives in one place, and I finally stopped letting things slip.”
“I study a little before each class and walk in already understanding the material — which frees me up for work and everything else in my life.”
“I used to check out until finals. Now I stay involved with my courses week to week, and it completely turned my grades around.”
Study on every device
Take Semestra anywhere
Semestra runs in your browser and as an app on iOS and Android. Start a lesson on your laptop between classes and pick it up on your phone on the bus — your courses, deadlines and progress stay in sync.
Study smarter
Free study guides — no sign-up needed
Spaced Repetition Explained
Why the forgetting curve works — and how to build a review habit that makes what you learn stick.
Study Smarter, Not Harder
Practical study techniques that beat re-reading your notes for the fifth time.
Prepare for an Exam in a Week
A realistic day-by-day plan for when the exam is close and the notes are not done.
Frequently asked questions
Is Semestra free?
Yes. Semestra has a free plan that covers your courses, schedule, deadlines and study groups, plus AI lessons every month. New accounts also get 7 days of full Premium access — no card required.
What can I turn into a lesson?
PDFs, Word documents, PowerPoint slides, plain text and Markdown, photos of notes, web links, and YouTube lectures (Semestra reads the transcript). You can combine several sources into one lesson.
How are the quizzes made?
Every quiz is generated from the material you uploaded — not from generic question banks — so it tests what your lecturer actually gave you. Each question includes an explanation, and you can retake quizzes as often as you like.
Does it work on my phone?
Yes. Semestra runs in any browser and as an app on iOS and Android. Your semester, lessons and progress sync across every device you sign in on.
Can I study with my classmates?
Yes. Study groups let you share lessons, quizzes and flashcard decks, compare progress on a leaderboard, and import a classmate’s semester timetable so you don’t have to set it up yourself.
Does Semestra replace my lecturer’s notes?
No — it works from them. Semestra turns the material you were actually given into lessons, quizzes and flashcards, so you are revising your own course, not someone else’s summary of it.
Start with 7 days of Premium, free
No card required. Full Premium access for 7 days.