Ordered by how much each one helps the core study loop for a typical high school or college student. Your top pick may differ by subject; use the finder above.
1NotebookLM
Source-grounded notebook
VisitBest for: Studying from your own PDFs, slides and notes
Google’s NotebookLM answers only from the sources you upload (PDFs, Google Docs and Slides, web pages, YouTube links, audio) and cites the passage behind every answer. It also turns a notebook into study guides, quizzes, flashcards, mind maps and a podcast-style Audio Overview.
Pros
- ✓Answers are tied to your own course material, with clickable citations
- ✓Audio Overviews turn a reading list into a listenable recap
- ✓Quizzes, flashcards and study guides from the same sources
- ✓Generous free plan with a Google account
Cons
- ✗No spaced-repetition schedule, so reviewing over weeks is up to you
- ✗Only as good as the sources you give it
- ✗Higher limits need a Google AI plan
How to study with it
Make one notebook per course, upload the syllabus, slides and readings, then ask it to explain the parts you do not get. Click the citations to read the original passage before you trust a summary.
Free planFree with a Google account
2Flashcard Maker
AI flashcards + spaced review· Our tool
Try freeBest for: Turning notes, PDFs or a topic into flashcards you actually review
Our tool. Paste notes, upload a PDF, give it a link or just type a topic, and it writes question-and-answer flashcards in seconds. Decks open straight into Learn mode, which tracks what you miss and brings it back, plus quizzes and multiple choice.
Pros
- ✓From notes or a PDF to a study-ready deck in under a minute
- ✓Learn mode brings back the cards you miss
- ✓Works without an account; a free account saves decks across devices
- ✓Quiz and multiple-choice modes from the same deck
Cons
- ✗Free decks are capped (10 cards signed out, 15 signed in)
- ✗Not a general tutor: it builds and runs practice, it does not chat about every subject
- ✗Fewer community-made decks than Quizlet
How to study with it
After a lecture or a reading, paste the notes and make a 10–20 card deck. Do one Learn round the same day, then come back when the deck tells you cards are due. Edit any card the AI got wrong before you study it.
Free planFree, no sign-up needed
PaidPro $9.99/mo or $95.88/yr; Exam Pass $19.99 once for 3 months See plans 3ChatGPT (study mode)
General AI tutor
VisitBest for: Being walked through a hard concept step by step
ChatGPT’s study mode switches it from answering to tutoring: it asks what you already know, explains in small steps and checks your understanding with questions. It is available on the free plan.
Pros
- ✓Study mode guides you instead of handing over the answer
- ✓Handles almost any subject and level
- ✓Free plan includes study mode and file uploads (with limits)
Cons
- ✗Can state wrong facts confidently; check against your materials
- ✗No built-in review schedule; what you learn is not brought back later
- ✗Best models and higher limits need Plus at $20/mo
How to study with it
Turn on study mode, say what class and level you are in, and ask it to quiz you at the end. Ask for sources and check numbers, dates and quotes against your textbook.
Free planFree plan with study mode
4Gemini (Guided Learning)
General AI tutor
VisitBest for: Free step-by-step explanations with diagrams and videos
Gemini’s Guided Learning mode breaks a topic into steps, mixes in images, diagrams and YouTube videos, and can turn what you covered into flashcards and a quiz.
Pros
- ✓Visual explanations: diagrams, images and videos inline
- ✓Makes flashcards and quizzes from the conversation
- ✓Works on the free plan with a Google account
Cons
- ✗Like any chatbot it can be wrong; check key facts
- ✗Flashcards stay in the chat, with no long-term review schedule
- ✗More usage needs Google AI Plus ($4.99/mo) or Pro ($19.99/mo)
How to study with it
Pick Guided Learning, upload a worksheet or a photo of your notes, and work through it one step at a time. Finish by asking for a short quiz on the parts you found hardest.
Free planFree with a Google account
5Claude (learning mode)
General AI tutor
VisitBest for: Long readings, essays and careful explanations
Claude handles long documents well and its learning mode answers with guiding questions instead of finished work. Projects let you keep a course’s files and instructions in one place.
Pros
- ✓Strong with long readings and essay feedback
- ✓Learning mode prompts you to reason it out yourself
- ✓Projects keep each course’s material together
Cons
- ✗Free plan limits run out quickly with long files
- ✗No flashcard review schedule
- ✗Pro is $20/mo ($17/mo billed yearly)
How to study with it
Create a project per course, add the readings, and ask it to explain an argument or give feedback on an outline you wrote, not to write the essay for you.
6Perplexity
AI search with citations
VisitBest for: Research questions where you need the sources
Perplexity searches the web and answers with numbered citations, so you can see where each claim came from. Good for the research stage of a paper or for checking a fact.
Pros
- ✓Every answer links to its sources
- ✓Fast way to find papers, reports and articles to read
- ✓Useful free plan
Cons
- ✗Summaries can misread a source; always open the link
- ✗Not built for practice or memorizing
- ✗Pro is $20/mo
How to study with it
Use it to find and read sources, not as a source itself. Open the citations, read the original, and cite that in your paper.
7Anki
Spaced-repetition app
VisitBest for: Memorizing thousands of facts over months (med school, languages)
Anki is the open-source spaced-repetition app that medical students and language learners swear by. Its FSRS scheduler times every review for the moment you are about to forget. It has no built-in AI; you write or import the cards.
Pros
- ✓The most proven long-term review scheduler
- ✓Free on desktop, web and Android
- ✓Huge library of shared decks and add-ons
Cons
- ✗No AI: you make or import every card
- ✗Steep learning curve and a dated interface
- ✗iPhone app is a one-time $24.99
How to study with it
Use it for material you need for months. Make cards with an AI tool or import a shared deck, then do your reviews every day so the queue never piles up.
Free planFree (desktop, web, Android)
8Khanmigo
AI tutor for K-12
VisitBest for: A patient tutor for middle and high school that won’t just give answers
Khan Academy’s AI tutor is built around Khan Academy’s lessons and practice. It is designed to nudge students toward the answer rather than reveal it, which makes it a safe pick for younger learners.
Pros
- ✓Refuses to just hand over answers, by design
- ✓Tied to Khan Academy’s free lessons and exercises
- ✓Low price; free for teachers
Cons
- ✗Paid for learners and parents
- ✗Narrower than a general chatbot outside school subjects
- ✗Not built for your own notes or PDFs
How to study with it
Work through a Khan Academy unit and open Khanmigo when you are stuck on a problem. Ask it to check your reasoning, not your final answer.
Free planFree for teachers
9Wolfram|Alpha
Computational engine
VisitBest for: Checking math, physics and chemistry step by step
Wolfram|Alpha computes answers instead of predicting text, so math results are reliable. Pro adds step-by-step solutions, which is what makes it a study tool rather than an answer machine.
Pros
- ✓Computes, not guesses: dependable math answers
- ✓Step-by-step solutions with Pro
- ✓Covers algebra through calculus, statistics and chemistry
Cons
- ✗Step-by-step needs Pro
- ✗Input syntax takes some getting used to
- ✗Easy to copy instead of learn
How to study with it
Solve the problem yourself first, then use the step-by-step solution to find exactly where your work went wrong.
Free planFree answers without steps
10Quizlet
Flashcards + community sets
VisitBest for: Finding a set someone in your class already made
Quizlet’s strength is its library: millions of sets made by students and teachers, often for the exact textbook you use. Learn mode and practice tests are the paid draw.
Pros
- ✓Enormous library of ready-made sets
- ✓Learn mode and practice tests
- ✓Familiar to most teachers and classmates
Cons
- ✗The free plan now limits Learn rounds and practice tests
- ✗Community sets often contain mistakes
- ✗Ads on the free plan
How to study with it
Search for your course or textbook chapter, check the set for errors, then study it in Learn mode or make a practice test.
Free planFree with limits and ads
Best for: Free flashcards and notes with AI summaries
Knowt combines notes, flashcards and a free Learn mode, and imports Quizlet sets. Its paid Ultra plan adds AI summaries of PDFs, videos and lecture recordings.
Pros
- ✓Free flashcards with Learn mode
- ✓Imports Quizlet sets
- ✓AP, SAT and ACT prep material
Cons
- ✗The AI summarizers are in the Ultra plan
- ✗Ultra is $149.99/yr or $24.99/mo
- ✗Busy interface with ads on the free plan
How to study with it
Import an existing Quizlet set or make one from your notes, then use the free Learn and spaced-repetition modes.
12Otter.ai
Lecture transcription
VisitBest for: Transcribing and summarizing lectures
Otter records and transcribes speech live, then writes a summary with key points. Useful when a lecturer talks fast or you want to review a class you missed.
Pros
- ✓Live transcript you can search later
- ✓Automatic summaries and highlights
- ✓Free minutes each month
Cons
- ✗Free plan caps minutes per month and per recording
- ✗A transcript is not studying; you still need practice
- ✗Recording may need permission
How to study with it
Ask the lecturer before recording. Afterwards, turn the summary into flashcards so the lecture actually sticks.
Free planFree monthly minutes
