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.
LabSmith 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 and XP — 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.
No accounts, no ads, no tracking
There is no sign-up and no login. There are no ads and no in-app purchases, and no third-party trackers. The physics labs run entirely in your browser from simple, exact formulas — nothing is streamed or sent.
Learn by predicting
The three labs ask you to make a prediction BEFORE the experiment runs — the best-evidenced way to learn science — with a hint only after a first try, and a plain explanation every time. A wrong prediction is not a mistake to feel bad about; noticing the surprise is exactly how scientists learn. The 400 questions come straight from the LabSmith iOS app.
Real physics, honestly modelled
The labs use the standard textbook models — projectile range, a small-swing pendulum's period, and per-bulb power in series and parallel circuits. They ignore air resistance and other small effects so the core idea stands out clearly, the same way a classroom demonstration does.
Spark & Anvil is a non-profit, 501(c)(3) pending. Apps stay free forever. This page is a plain-language summary, not legal advice.