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without a camera. Of the hardware features in table 1.2, the iPad only has Bluetooth, accelerometers, and a compass.

The iPhone s core uniqueness goes far beyond its powerful web browser and its tightly integrated web functionality. Its unique physical form and the decisions embedded in its software also make the device a breakthrough in cell phone technology. Six core ideas most of which we ve already hinted at speak to the iPhone s innovation. Most

Table 1.3 The iPhone has a number of unique physical and programmatic elements that should affect any development on the platform. Unique element 1. Always-on internet 2. Power consciousness 3. Location aware 4. Orientation aware 5. Innovative input 6. Innovative output Summary A well-integrated, constant internet experience A device you can use all day A device that knows where it is A device that detects movements in space Finger-based interaction A high-quality, scalable screen

of these ideas have carried over to the iPad. Understanding these elements (summarized in table 1.3) will help you in whatever type of development you re planning. We touched earlier on the idea of an always-on internet. What s notable is how successful Apple has been in pushing this idea. Huge data-transfer rates show that iPhone users are indeed always on. In Europe, T-Mobile reported that its iPhone users transferred 30 times as much data as regular users. Google has also shown a notable uptick among iPhone users, who are 50 times more likely to conduct a search than the average internet user. Looking at overall stats, the iPhone s Mobile Safari has become the top mobile browser in the United States and is quickly moving up in the international market as well. Anecdotal evidence is consistent, as friends talk about how an iPhone user is likely at any time to grab their iPhone to look up a word in Webster s or a topic in Wikipedia, showing off how the iPhone has become the encyclopedia of the twentyfirst century for its users. The iPad will surely continue this trend. When Apple announced the iPhone, the company highlighted its power consciousness. Users should be able to use their device all day, whether they re talking, viewing the web, or running native applications. Despite the higher energy costs of the 3G network, the newest iPhone still supports 5 hours of talking or 5 6 hours of web browsing. Power-saving tricks are built deeply and thoughtfully into the iPhone and iPad. For example, have you noticed that whenever you put your iPhone up to your ear, the screen goes black to conserve power And that it comes back on as soon as you move the iPhone away from your ear Power savings have also been built into the SDK, limiting some functionality such as the ability to run multiple programs simultaneously in order to make sure that a user s iPhone or iPad remains functional throughout the day. Thanks to its GPS, an iPhone is location aware. It can figure out where a user is, and developers can design programs to take advantage of this knowledge. But to preserve users privacy, Apple has limited exactly what programs can do with that knowledge. Just as an iPhone is knowledgeable about large-scale location changes, the iPhone and iPad also recognize small-scale movements, making them orientation aware. As we ve already noted, this is thanks to three accelerometers. They don t just detect

orientation; they can also be used to measure movement. This sophisticated input can be accessed by SDK programs. Because the iPad is running the iPhone OS, most of its uniqueness is inherited from the iPhone. It may not be the first touch-only device to hit the market, but it s definitely been shown to be the best based on the staggering number of initial purchases. One of the most unique things about the iPad is its incredible support for orientations. There is no wrong way to hold the device. Never before has any device supported such a feature.