App stores are hugely lucrative—and under attack

Since the first iPhone fell into people’s pockets in 2007, apps have steadily become the portal of choice to the digital world. The mobile devices on which they run now account for two-thirds of global internet traffic. Inhabitants of rich countries spend about five hours a day staring at apps—roughly a third of their waking lives. Around the world some 3.5bn people use them each month.