Hyper Sheets: Learn to Code

Hyper Sheets is a learn-to-code app for complete beginners, right on your phone. Learn HTML, CSS, JavaScript, Python, SQL and more programming languages through short hands-on lessons, coding exercises that are checked automatically, and games. The app is in English and Indonesian.

Every lesson, exercise and game is free, and none of them show ads.

LEARN TO CODE FROM THE BASICS
Start with programming basics: algorithms and pseudocode. Then HTML and CSS to build your first web page, then JavaScript to bring it to life. Every lesson is short, has examples you can change yourself, and ends with a small quiz.

47 PROGRAMMING TOPICS
• Web: HTML, CSS, JavaScript (JS), TypeScript, Tailwind
• Frameworks: React, Vue, Svelte, Angular, Node.js, Laravel
• Programming languages: Python, PHP, Go, Rust, SQL
• A programmer's toolkit: algorithms, data structures, Git, the terminal, debugging, clean code
• Further on: APIs, databases, web security, DevOps, system design

PICK YOUR PATH
• Build websites: HTML, CSS, then JavaScript and React
• Work with data: Python and SQL
• Build a backend: PHP and Laravel, or Node.js
• Write code like a programmer: algorithms, data structures, Git and clean code

1,600 CODING EXERCISES
A code editor right in the app, automatic checks, hints step by step when you are stuck, and your output side by side with the expected one.

SCENARIOS: A CLIENT CHATS, YOU BUILD IT
Bu Sumiati wants a pre-order page for her Eid cookies. Kang Asep needs a page for his bakso cart. Read the brief in the chat, build the order with HTML and CSS, and see the result right away. Coding practice that feels like real work.

350+ CODING GAMES, EACH ITS OWN WORLD
• HTML Inspector: inspect the HTML tags at the village hall
• Selector Wars: a tug of war fought with CSS selectors
• Condition Crafter: open the gate with a JavaScript if
• Guess the Console: guess what the console prints
Plus the Pixel Arcade and the Hero Controller adventure.

1,200+ LESSONS, 410 PLAYGROUNDS
Many lessons open with a warm-up question, then you play with the idea yourself in a playground: the box model, flexbox, grid, the event loop and hundreds more.

KAMPUNG HYPER SHEETS
A pixel village of your own. Farm your field, raise chickens, goats, cows and sheep, catch 100 kinds of fish, join the Independence Day games, and make friends with 28 villagers. Client work comes in through the laptop at home.

ARENA
5-minute speedruns, 1v1 duels and a contest every Saturday. Your rating goes up when you win and down when you lose.

LEAGUES, BADGES, CERTIFICATES
Weekly leagues, 380+ badges and 600+ cosmetics for your profile, most of them bought with coins you earn by learning. Finish a category and pass its exam to earn a certificate.

ALSO INSIDE
• Typing school: touch typing, made for code
• Speaking practice: standups, demos, interviews, client meetings
• 12 languages for work (English, Japanese, Korean, German, Spanish and more), taught in Indonesian
• Classes: teachers create a class and follow their students' progress
• Showcase and portfolio to show off your projects

IF YOU WANT TO SUPPORT IT
Learning stays free. Supporters get a badge that grows every month, special cosmetics and a daily coin bonus. PRO adds AI credits for Ask Hex, the tutor, and a bigger coin bonus.

Made in Indonesia, for anyone learning to code on their phone: students, career changers and future programmers.

Recent changes:
• Foldini flies in as a paper plane when you open the app.
• Change the app icon in Settings › Appearance: six for everyone, three streak rewards, two for PRO.
• Arena contests and focus sessions show the time left on the lock screen, and in the status bar on Android 16.
• Study music plays with the screen off, with controls on the lock screen.
• Choose the app's language in Android's settings (Android 13 and up).
• The streak widget connects by itself once you sign in.
• A smaller app.