The first iPhone combined a phone, a music player, and an internet device into one touchscreen tool.

Apple spent 30 months and 150 million dollars developing the first iPhone under the secret name Project Purple. Steve Jobs revealed the device in January 2007. It had a 3.5-inch screen with a resolution of 320 by 480 pixels. This was much sharper than other phones available at the time.The screen used capacitive technology to work. This type of screen senses the electricity in your skin instead of the pressure of your touch. This allowed the phone to recognize more than one finger at a time. This made features like pinching the screen to zoom into photos possible.The first iPhone did not have an App Store when it launched in June 2007. Users could only use the apps Apple built into the phone like Safari and Mail. Apple sold 270,000 iPhones in the first weekend. By 2008, they had sold over 6 million units.The phone also included a sensor called an accelerometer. This sensor detected which way the phone was being held. It automatically rotated the image on the screen to match the user's grip. This technology changed how all future smartphones were designed.