Improved
A redesign, built for phones first
Before
Pages looked different from one another, and on a phone the 12-lead was a long column of leads, a turned flashcard could slip off the screen and the homepage ran to eleven sections.
After
One look across the site. On a phone the 12-lead is the standard 6 × 2 with squares large enough to read, and a tapped lead opens its wave and measurements in one sheet. Flashcards mark your answer before they turn. Articles open with one sentence and let you read each strip before showing the answer. The homepage is shorter, with every tool on it.