AI has changed how studying works, and students who know which tool to reach for have a real advantage over those using one chatbot for everything. Here are eight, with free options for each need.
One thing first, because it matters more than any tool below: check your institution’s policy. Using AI to understand material is almost always fine. Using it to produce work you submit as your own is usually not, and the difference is worth being clear about before you rely on any of this.
1. ChatGPT - the most versatile study assistant
Explaining a concept five different ways until one lands, working through problems step by step, drafting outlines. Its strength is breadth: whatever the subject, it can help.
Free tier is genuinely usable, with unlimited text chats. Note that from 24 August 2026 the free and Go tiers show ads in Europe.
2. Perplexity AI - for research with real sources
The one to use when you need citations. Every answer carries clickable sources, which is exactly what a bibliography requires and exactly what a general chatbot will not reliably give you.
Education Pro is $10/mo for verified students, half the normal price, and the free tier covers about five Pro searches a day.
3. Claude - for long texts and PDFs
Feed it a hundred-page paper and ask questions about it. Claude holds far more context than most alternatives and is the strongest of the group at reasoning about a long document rather than summarising it superficially.
Also the best at writing, which makes it the natural editor for your own drafts.
4. Notion AI - for organising notes
Useful only if your notes already live in Notion, but if they do, AI search reads across everything you have written and answers from it. Over a semester of accumulated material that is genuinely powerful.
5. Quizlet AI - for memorisation and exams
Turns your material into flashcards and practice tests automatically. For anything that requires recall rather than understanding - vocabulary, dates, anatomy, formulas - spaced repetition still beats rereading, and this removes the work of building the deck.
6. Grammarly - for writing better in English
Inline correction wherever you write, plus plagiarism detection, which matters for submitted work. Particularly useful if English is not your first language and you are writing academic prose in it.
Free tier covers ordinary proofreading.
7. Duolingo Max - for learning languages
The AI tier adds explanations of why an answer was wrong and conversation practice, which are the two things traditional Duolingo could never do.
8. Wolfram Alpha - for maths and hard sciences
The important one on this list. General chatbots still make arithmetic and algebra mistakes with total confidence. Wolfram Alpha computes rather than predicts, and shows the steps.
For anything quantitative, verify with Wolfram rather than trusting ChatGPT.
What to pick for your situation
If you can only use free tools: ChatGPT free, Perplexity free, Grammarly free and Wolfram Alpha’s free tier cover most of what a student needs, and that combination costs nothing.
If you can pay for one thing: Perplexity Education Pro at $10/mo, because sourced research is the hardest thing to get free and the most useful for written work.
If you write long essays: Claude, for the analysis and the editing.
If your exams are recall-based: Quizlet, and start earlier than you think you need to.
Never trust the maths. Whatever tool produced a number, check it in Wolfram Alpha before it goes into your work.