Yours, not ours
Your progress
Everything you’ve built — 0 of 139 concepts — lives on this device, in this browser. No account holds it hostage. Take it with you, bring it back, or start clean.
Take it with you
One small file holds your whole build — every concept, your exercise code, where you left off.
Bring it back
New device, fresh browser, cleared storage — restore the file and the map lights back up exactly where it was.
Works offline
Once you’ve loaded a page here, it’s cached — lessons, exercises, and checks keep working without a signal. Installing to your home screen is a bonus for the app feel; the offline part already works either way.
Start clean
Wipes this device’s progress back to zero — no judgment, just a fresh start. Download first if you want a way back.