Index

90-9-1 rule, 88

A

A/B testing, 9293

ABC News app, 52, 53

accidental activation, 138, 143145

Adobe Photoshop Express app, 59

affordances

discoverability of, 138141

explanation of perceived, 141

Alfred app, 132

AllKpop.com case study, 6776

iterative design steps, 7375

positive features of current site, 68

redesign recommendations, 6972

user testing of redesign, 7576

alphabetical sorting, 124126

Amazon.com

Android apps, 36

Kindle devices, 169178

Kindle iPhone app, 170

Windowshop app, 70, 156

Amici’s pizza app, 83

Android

Back button, 65, 66

physical vs. virtual buttons, 37

smartphones using, 14

subplatforms, 3536

Apple App Store, 86, 88, 90

application chrome, 56

apps

ephemeral, 42

homepage for, 64

hybrid, 40

intermittent-use,

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