60 milliseconds is when we notice something isn’t immediate. Any user interaction, that involves sending data over the network or doing heavy computation on it, usually takes way longer than 60 milliseconds. So, we end with a progress bar. There are two broad categories of progress bars, one that shows the absolute/relative progress, a determinate progress bar, and one that does not an indeterminate progress bar.
Android Before 2008, smartphones OS market was fragmented. There were a few big names like Palm and Symbian, but most phone manufacturers were doing their custom operating systems. For example, Motorola alone had five operating systems. In 2008, Google came out with an open-source smartphone OS. Mobile phone manufacturers like Samsung, Motorola, and HTC, embraced it and made short-term profits till they got commoditized by a standardized OS controlled by Google. On the other hand, Nokia and Blackberry decided to ignore and badly lost market share. Eventually, they embraced it as well, albeit, in different forms but it seems its a bit late. The only winner (till now) is Apple, who was simultaneously working on iPhone and has held its ground well primarily, due to superior UI design and user experience on iOS. ...