He reads books (currently Harry Potter, a big hit in Estonia) and writes them (on economics, history and politics).

ECONOMIST: Charlemagne

He takes Liszt's advice and reads books at the same time as training his fingers to deal with an especially thorny technical problem.

ECONOMIST: Pianos and pianists: Perspirations | The

Mostly he uses it for Dr. Seuss books in which the app reads the story, and games about animals.

WSJ: What Happens When Toddlers Zone Out With an iPad