Privacy & how it works

FractionForge on the web is built the same way as our iOS apps: private by design.

A fraction is a plan for sharing. A good plan has no sliver.

Halver puts it this way in his chapter: “Fractions were just the language of sharing.” Seven oranges among twelve people is a third and a quarter each — the only plan whose smallest piece is a quarter. Try the Orange Table. The oldest sharing problems we have are a scribe's: Ahmes's Loaves.

Your work stays on this device

Your progress — days active, best scores, which challenges you finished — is stored only in this browser (using 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. There are no third-party trackers or advertising tools embedded in the app.

Built for ages 9–14 (and friendly to younger)

The questions come straight from the FractionForge iOS app and are aligned to CCSS Math standards. The characters you meet each embody one fraction idea — the story is a reward at the end of a round, never a distraction during it.

Accessible

Every tool works with a keyboard and a screen reader — the fraction bar, pie, number line, and grids all announce their state as you change them. Motion and transparency respect your system settings.

Spark & Anvil is a non-profit, 501(c)(3) pending. Apps stay free forever. This page is a plain-language summary, not legal advice.

Full parent guide Site privacy policy