Now on web — bigger editor, keyboard-first

Level up your coding, one focused session at a time

Learn across frontend, backend, data and more. Focused-time practice, capstone projects, and real-time skill battles — all gamified.

Free forever plan. No credit card required.

focus · 25:00 · javascript
function twoSum(nums, target) {
  const seen = new Map();
  for (let i = 0; i < nums.length; i++) {
    const need = target - nums[i];
    if (seen.has(need)) return [ seen.get(need), i];
    seen.set(nums[i], i);
  }
}

Verification

All test cases passed
+120 XP · streak extended

Everything you need to actually improve

Practice that sticks — structured, gamified, and built for daily momentum.

Focused sessions
15, 25, 45 or 60-minute timed sessions with a single exercise and a real code editor. Deep work, no distractions.
AI code review
Submit your solution and get instant verification plus AI feedback that explains what to improve and why.
Capstone projects
Ship real 5-step projects with lightweight rubric checks — a TODO app, a portfolio site, and more.
Skill battles
Go head-to-head in real-time 1v1 battles, or team up for co-op boss-fight raids.
Streaks & XP
Earn XP, crystals, badges and cosmetics. Keep your streak alive and watch your skill tree light up.
Friends & feed
Add friends, follow their progress, and celebrate skill completions and project ships together.

How it works

A simple loop you can run every day in fifteen minutes.

01

Pick a skill

Choose a node from your skill tree — HTML, algorithms, SQL, whatever you're leveling next.

02

Do a focused session

Read the concept lesson, set a timer, and solve one exercise in the editor. Ship it for instant verification.

03

Earn XP & keep the streak

Pass the checks to bank XP and crystals, extend your streak, and unlock the next node.

Loved by people who ship

Real quotes coming soon — here's the vibe.

The daily focus sessions finally made practice a habit instead of a chore.

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Frontend developer

Skill battles are stupidly fun. I learned more in a week than a month of tutorials.

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CS student

The AI review actually explains my mistakes. It's like pairing with a patient senior.

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Career switcher

Simple, honest pricing

Start free. Upgrade when you're ready to go unlimited.

Free
Everything to build the habit.
$0/forever
  • 2 focus / quick-solve sessions per day
  • 10 AI code reviews per month
  • 7-day statistics history
  • 2 of 5 capstone projects
  • Dark theme
Start for free
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Pro
For serious daily practice.
$39.99/yr
  • Unlimited sessions & quick solves
  • Unlimited AI code reviews
  • Full statistics history
  • All 5 capstone projects
  • Battle tournaments & 4 premium themes
  • Weekly crystal stipend

Billing launches with the full app.

Frequently asked questions

Ready to start your streak?

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