When Apple inc. released the iPod touch it was expected to be seen as an upgraded version of the iPod, with the ability to access the internet wirelessly as well as the typical media playing features of the iPod, but instead it seems to have been given the image of being a downgrade of the iPhone. In comparison to the iPhone the iPod touch is both smaller and lighter. The iPod touch also has a longer battery life then the iPhone as it can play 36 hours of audio or six hours of video, where as the iPhone has 24 hours of audio and 7 hours of video playback when fully charged.
The iPod touch and the iPhone have many features in common. The home screens of both are very similar with the iPhone having a few additional icons to symbolise the applications available known as widgets. These include text messaging, camera and email application that are only available on the iPhone. The features that they both share are:
- Flash memory: This allows you to store 8GB (up to 1,750 songs or 10 hours of video) or 32GB (up to 7,000 songs or 40 hours of video) onto the iPod touch or iPhone.
- Wi-Fi: This allows users to access an internet connection wirelessly.
- Safari Web Browser: This allows you to access websites.
- Audio, video and photograph storage and playback.
- YouTube video player: This allows you to view videos on the device directly from the YouTube website.
- Other features are a calendar, contact application, clock and calculator applications
The thing that makes the iPod touch stand out from other iPods is its touch screen display. The screens circuitry is able to detect the presence of your finger on the screen, how many fingers are on the screen and also where they are situated.
The iPod touch uses a layer of capacitive material under a protective cover to do this. The capacitive material takes the electric properties of the human body and transfers it to the conductors within the iPod touch so the screen knows the location of your fingers on the screen. When you touch the screen the amount of charge it holds changes. This is why you need to touch the screen with your bare skin as using other materials or wearing gloves will not have the same effect on the capacitive circuitry.
The processor in the iPod touch keeps track of the position of your fingers and where they move when you have placed them on the screen. The iPod touch picks up what your fingers are doing on the screen and matches it with what is displayed on the screen. The processor determines the size and shape of your fingers and where they are located on the screen. The iPod classifies your touch and takes into account whether your fingers move and what the iPod is doing at the time. The processor then sends a message to the iPod touches screen which then displays the instructions your finger gave it to do.
It's easy to think of the iPod touch as a stripped-down version of the iPhone instead of a souped-up iPod. The iPod touch is a little smaller and weighs a little less than the iPhone. But the iPod touch has a battery that lasts a little longer than the one on the iPhone. The iPhone has about 24 hours of audio or seven hours of video playback time, and the iPod touch can play 36 hours of audio or six hours of video on a full charge.
The iPod touch's home screen also looks like the iPhone's, but with fewer icons. From the home screen, you can get to the iPhone's e-mail client, text-messaging capabilities, digital camera and collection of mini-applications called widgets. And, of course, you can also use the iPhone as a cellular phone. The iPod touch doesn't share any of these features, but the two devices do have a few things in common, including:
- Flash memory (8 or 32 GB for the iPhone, 8 or 32 GB for the iPod touch)
- Wi-Fi capabilities (802.11b/g)
- Safari Web browser
- Audio, video and photo storage and playback
- YouTube video player
- Calendar and contacts that synch with your computer
- Clock and calculator applications
- Access to the iTunes Music Store via Wi-Fi
- Dock and headphone connections
The thing that sets the iPod touch apart from other iPod models is its touch-screen interface. When you touch the screen, the iPod's circuitry detects the presence of your finger. It keeps track of how many fingers you have on the screen and where you move them.
The iPod touch does this using a layer of capacitive material under a protective covering. The basic idea involves taking advantage of the electrical properties of the human body. When you touch a capacitive surface, the amount of charge it holds changes. This is why devices like the iPod touch require you to touch them with your bare skin -- insulating materials like gloves, pens and styluses don't cause the same changes in the capacitive circuitry.
The iPod touch's processor keeps track of where you put your fingers and where they move once you've placed them on the screen. You can slide your fingers from place to place, or you can make pinching or spreading motions to zoom in and out. The iPod touch matches what your fingers are doing with what's happening on the screen:
- The iPod touch determines the shape, size and location of your finger -- or fingers -- on the screen.
- The device uses gesture software in its memory to classify your touch. It takes into account whether your fingers move and what your iPod is doing at the time.
- The processor sends instructions to the iPod touch's display, software and hardware based on the data your fingers create.