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Increment is a Duolingo-for-programming workout. Skill-tree progression, mixed challenges (multiple choice, code, fix-the-bug, drag-to-order), and a guided 10-step Portfolio Builder track that walks you through writing your own deployed site on a Mac.
Increment's coach (personalized hints, drills, project feedback) runs on z.ai. Paste a free API key — it lives only on this device.
No key? Get one free — takes 30 seconds.
Pick up where you left off, or start a fresh session.
Complete a lesson today to start your streak.
A short lesson is enough to hit your goal.
A guided 10-step path to a deployed homepage that hosts every project you'll ever ship.
Every node has prerequisites. Complete a lesson to unlock what depends on it. Mixed-skill missions sit at intersections.
A 10-step guided path to a deployed homepage you'll keep adding to. You'll write the HTML, CSS, and JavaScript yourself — the coach grades each step and explains what to fix. By the end, you own a real site you can put on every job application and link every future project to.
Everything you've shipped, and the streak you're building.
Wipes lesson progress, XP, and streaks. Doesn't touch your API key.