Drag to spin. Tap a planet.
Prompt“A solar system I can spin around. When I tap a planet, fly to it and show a fact.”
Built with Code Box
Three apps, each built from one prompt
Play them here.
0Best 0
Tap Play to start
Prompt“A block-stacking game like the one on my phone, with perfect drops, a score and a best score”
Tap anywhere to make a splash
Prompt“A grid of glowing blocks that ripples wherever I tap, with color themes to switch”
Try Code Box
Describe an app in one sentence and Code Box builds it
It plans the app, writes the code and fixes its own errors.
Examples:
Your prompt
Sign in to build this with Code Box
Free to start. No card needed.
How it works
Watch Code Box build the app
Sparky explains each step as the app appears in the preview. You never have to read code.
Blob Dashv1
Publish
Hi, I am Sparky
Tell me what you want to make and I will build a first version.
YouA runner game where a little blob jumps over rocks and grabs coins
- Plan the buildfree
- Draw the scrolling world
- Add Blob and the jump
- Add rocks to dodge
- Add coins and a score
- Fix: coins did not countfree
- Add sparkles and polish
Planning, fixing and testing are free. Tokens cover the parts that use a model.
Planning your buildSparky is working out the parts
Published · link ready
- Planning is free: talk through the idea before anything is built
- Auto-fix is free: Sparky repairs anything that breaks
- Testing feedback and assessment are free
- You are never charged for work that did not reach a model
Safety
Sandboxed apps and school sign-in
Published apps carry no credentials
A shared app runs on its own origin with an opaque identifier, not cookies or a login token.
The preview is sandboxed
Code being built cannot pull scripts from the open internet into the page.
One school sign-in
Students use their course account, so there is no separate password to reset.
Automatic assignment checks
Requirements are machine-checked and scores are deterministic, so learners get results without waiting on a model.
Inside your courses
Code Box projects go into the Sparked course gradebook
A course slide can assign a build task. Students build it in Code Box, link the project back, and it goes to the course gradebook with their other answers.
Free to start
Free Tokens to start, and planning and fixes are free
Plan mode, auto-fix, testing feedback and assessment feedback are free. Tokens cover only the parts that use a model.
Get in touch
Tell us about your school to bring Code Box to your classes
Tell us what you need and we will recommend a first step.
- Reply within one business day
- No spam or sales pressure
- English, or your language where possible