In July 2008 the Apple App Store went live. On launch day the marketplace featured 500 apps. Seven years and 75 billion downloads later there were more than 1.2 million different applications available in the App Store. By this stage Google had even launched its own marketplace.
As the app market has grown, trends governing good UI and UX design have emerged. Here I will take a look at four of the most successful apps to see how design has evolved over time and what we can learn from this.
