The Ergonomics of Design

Tapworthy Apps

Intuitive Design

Obey Physical Laws

Mirror the World

Rule of Thumb

Rule of Thumb

Controls on Bottom

Primary Content on Top

More: Secondary Nav

Use What's Familiar

Big Buttons

Overcrowding

Avoid Clutter

Simplicity

Simplicity

The One Thing

Scroll vs. 'Flip'

Magic Number 44

Iconic 88

Tapworthy Design

• Mirror rules of physical world

• Put primary controls in thumb's "hot zone"

• 44 is the magic number for tap areas

• Be generous with space, don't crowd design

• Keep controls in reach, avoid scrolling

Case Study:“The Spendometer”