Brilliant app guide: learn the science behind tech by doing

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Ever read about a 2-nanometre chip, a qubit or a neural network, nodded along, and quietly wished you knew what was really going on inside? Brilliant is an app and website that teaches the maths, science and computer science behind those headlines by making you solve small interactive problems instead of watching lectures. Here is how it works, roughly what it costs, which courses fit the stories we cover, and who should skip it.

Why it matters: the decade’s biggest tech stories (AI models, ever-smaller chips, quantum computers) run on a handful of ideas such as probability, logic and circuits. Learn those, even roughly, and the news stops being magic: you ask better questions and spot hype faster.

How we researched this guide: we did not take these courses ourselves. This guide is based on Brilliant’s own course pages and help centre (we label those as the company’s claims), Apple’s App Store listing, and independent coverage from Engadget, Microsoft’s quantum team, The News International, ElevenLabs and the review site e-student.org, all linked below and checked on 17 October 2026.

Who Brilliant is for, and who it isn’t

Brilliant says it is for “anyone ready to build real problem-solving skills in math and coding”, and that if you are comfortable adding, subtracting, multiplying and dividing, you can start. According to its help centre, students from primary school to university use it, alongside curious adults who want to finally understand algebra, coding, data science or AI.

It is a good fit if you:

• learn best by doing and getting things wrong, not by listening;
• want the why behind tech news, not a job-ready qualification;
• can spare a short slot most days.

It is probably not for you if you need a certificate: Brilliant does not issue certificates, course credits or degrees, a point independent reviewers at e-student.org also flag. It is also English only, and it needs an internet connection: lessons cannot be downloaded for offline use, according to the company.

How Brilliant works

Brilliant is built around interactive problems. Instead of only picking from multiple choice, you type expressions, drag pieces around and change things directly on screen, the company explains in its guide to interactives. That approach goes back years: when Brilliant launched its quantum course in 2019, Engadget described circuit-style puzzles and a simulator running right in the browser.

Naming note: Brilliant is renaming courses to topics and lessons to concepts; we still say “courses” because the web addresses do.

Since late May 2026 there is also Koji, an AI tutor (software that guides you through a problem, like a patient teacher looking over your shoulder). Brilliant says Koji can see what you are working on, points and sketches on the screen, and is designed never to just hand over the answer. Its launch was covered by ElevenLabs, which supplies Koji’s voice, and by The News International; both describe it as available in most maths and coding courses.

Brilliant runs in any web browser and in apps for iPhone, iPad and Android, and your progress syncs between them. To keep you coming back there are streaks (count of days in a row you learned: solving three problems or finishing one concept counts as a day), XP points and weekly leagues.

Free versus Premium

The app is free to download, with Premium sold as an in-app subscription, as Apple’s App Store listing shows. Here is how Brilliant’s help centre describes the two tiers today:

• Free: two “keys” a day, each unlocking one concept or practice set; you go through each course in order; occasional ads; a limited preview of Koji.
• Premium: no daily limit, jump to any concept, no ads, unlimited Koji. Plans are monthly, annual or a Family plan for up to six people.

Price-wise, we only give bands, never exact figures, because prices change. Based on the US prices reported by e-student.org and Wikipedia, the annual plan sits in our Mid-range band ($100-300 a year). Brilliant sometimes offers a free trial of Premium; the company says it asks for payment details and recommends cancelling at least 24 hours before it ends if you don’t want to pay. Check today’s price on Brilliant’s site before you sign up.

What you can learn

Brilliant is honest that its core strengths are maths and coding. Its subject list runs from fractions and algebra through probability, vectors, matrices and calculus; coding covers Python, algorithms and how AI works; data science covers statistics and visualisation; and a “Science & Technology” shelf includes classical mechanics, neural networks, large language models (LLMs, the type of AI behind chatbots), digital circuits and cryptocurrency.

One caveat for space fans like us: we found no dedicated astronomy or space course in Brilliant’s current catalogue. You get hands-on mechanics, light and quantum ideas, the toolkit behind every rocket and telescope story, but not a space course.

Quick picks: Brilliant courses that explain the tech news

These seven courses map onto the topics TechNews covers most. Levels and contents are Brilliant’s own descriptions from each course page.

A few connections to our own stories. If our explainer on AI TOPS and laptop NPUs made you curious about what those chips actually compute, Introduction to Neural Networks is the natural next step. Digital Circuits starts with the same kind of logic gates that, copied an enormous number of times and shrunk to nanometre scale, fill the chips in our piece on Rapidus and 2 nm manufacturing.

The quantum course has a nice bit of history. It was built in 2019 with Microsoft’s quantum team and Alphabet’s X, as both Microsoft and Engadget reported at the time, and learners write small programs in Microsoft’s Q# language alongside drag-and-drop circuit puzzles. It is the most demanding pick here: Brilliant suggests being comfortable with 2×2 matrices (small grids of numbers) first.

Pros and cons

Pros:

• You learn by solving, not by watching: interactive problems with instant feedback.
• Courses that link straight to big tech topics: AI, chips, quantum, logic.
• A real free tier: two concepts a day, every day.
• Works on web, iPhone, iPad and Android, with progress synced.
• Koji, the AI tutor, is built to guide your thinking rather than give answers.

Cons:

• English only.
• No certificates or credits.
• Needs an internet connection; no offline lessons.
• The free tier is slow for bingeing; full Koji needs Premium.
• Science and space coverage is thinner than maths and coding.

How to choose, and how to fit it into 15 minutes a day

Start from the news you enjoy most. AI: begin with How AI Works. Chips and gadgets: Digital Circuits, then How Technology Works. Quantum: warm up with Logic or Scientific Thinking, then try Quantum Computing. If maths feels rusty, Brilliant’s own advice is to start where you are comfortable; it says the curriculum begins with fractions and early pre-algebra.

Brilliant doesn’t publish a fixed length for its lessons, so we won’t invent one. But two things it does publish make a short daily habit natural: a streak day needs only three solved problems or one finished concept, and the free tier gives you two concepts a day. Our suggestion: set a 15-minute slot, for example with your morning coffee, aim for one or two concepts, and stop there. Keep a pencil nearby for sketching circuits and graphs. After each unit, reread a TechNews article on the subject and see how much more clicks.

FAQ

Is Brilliant free?

Yes, there is a free tier with a daily limit of two concepts or practice sets, ads and a short Koji preview. Premium removes the limits.

Is Brilliant available in Spanish or other languages?

No. Lessons are in English, and the App Store lists English as the app’s only language.

Do I get a certificate?

No. Brilliant does not award certificates, course credits or degrees. If you need a certificate, look at university-style course platforms instead, and use Brilliant to build the intuition behind them.

Can I learn offline?

Not at the moment. According to Brilliant’s help centre, concepts need an internet connection.

Read next

• What are AI TOPS? The number on every new laptop, explained
• Rapidus 2nm: Japan’s bid to build the world’s tiniest chips
• Penrose’s quantum consciousness: what anaesthesia reveals