Heads up: this browser isn't saving anything for this site, so progress and settings reset when you leave the page. Everything still works while you're here.
PowerForge on the web is built the same way as our iOS apps: private by design.
Your work stays on this device
Your progress — best scores, XP and days active — is stored only in this browser (on-device storage). It is never sent anywhere. Clear your browser data and it's gone; nobody else can see it.
The grid and the energy chains run right here
The grid balancer's supply/cost/emissions math and the energy-conversion chains all run inside this page — pure on-device arithmetic and logic. There's no server, no simulator in the cloud, and no AI that sees what you build.
No accounts, no ads, no tracking
There is no sign-up and no login. There are no ads and no in-app purchases. There are no third-party trackers embedded in the app.
Built for ages 9–14
The 400 concept questions come straight from the PowerForge iOS project and are aligned to NGSS MS-PS3 energy-science and engineering-design standards. The grid numbers are simplified for learning — real power systems are far larger — but the trade-offs between cost, emissions and a reliable supply are real. A hint appears only after a first try, so you think it through first, and mistakes are treated as part of learning.
Balanced, not preachy
PowerForge shows the real trade-offs of every energy source — cost, reliability and emissions — and lets you decide. It doesn't tell you which source is "right"; it gives you the numbers so you can reason about them yourself.
Spark & Anvil is a non-profit, 501(c)(3) pending. Apps stay free forever. This page is a plain-language summary, not legal advice.