Schoolhouse app · free
The Ledger Academy Schoolhouse is a free progressive web app. You can put it on your phone or computer home screen so it opens like an app — full screen, with the trail cached after the first visit. No app store fee. No checkout.
In Chrome or Edge, open the site and use the install icon in the address bar, or the browser menu → Install The Ledger Academy Schoolhouse. It opens in its own window.
After the first successful visit, stamps, coins, streak, badge serials, and self-issued credential files live in this browser and keep working without a network. A brand-new lesson you have never opened still needs a connection the first time.
The Ledger Academy is a free school. Site sponsorship is disclosed in the footer and is not part of the lessons.