IPod Touch

The iPod Touch (stylized and marketed as lowercase iPod touch; also colloquially referred to as the iTouch, by analogy to the iPhone) is a portable media player, personal digital assistant, gaming console, and Wi-Fi mobile device designed and marketed by Apple. The iPod Touch adds the multi-touch graphical user interface to the iPod line. It is the first iPod with wireless access to the iTunes Store, and also has access to Apple's App Store, enabling content to be purchased and downloaded directly on the device. As of March 2011, Apple has sold over 60 million iPod Touch units.

1st generation
The iPod Touch (1st generation) was originally released on September 14, 2007 in black with 8GB or 16GB storage space, but later a 32GB model was added to the market on February 5, 2008. The first of its kind, the iPod touch was an instant hit; achieving success similar to the first generation iPhone, which was released a few months prior to the iPod touch. Today refurbished iPod touch 1st gens go for about $100 - $200, despite the line being discontinued on September 9, 2008.

4th generation
The iPod Touch (4th generation) was originally released on September 12th 2010 with just a black model, a new white model was added on October 12th 2011 at the same time as the iPhone 4S. This iPod Touch was set at the price $199-$399.

New Features
The new iPod touch included most of the new features of the iPhone 4, including the retina display at 326 ppi and res of 960x640, a front camera for Facetime, and a back camera for HD video recording. The iPod touch 4 is 26% thinner than the iPod touch 3. The iPod touch 4 comes in black and white and comes with the new 5.0 update, which includes the following new features:

FaceTime (video-calling): FaceTime was added to the iPod touch 4 with the front camera, it enables iPod touch users to call any Mac with video conference ability, iPhone 4 or later, iPad 2 or later or another iPod touch 4 or later and have a video chat (similar to Skype). To use FaceTime on an iPod Touch, you need to use an email address.

iMessage (texting): iMessage was introduced in the iPod touch 4 to enable users to freely text another Apple device (iPhone, iPad, Mac) running iOS 5 or OS X Mountain Lion or later by using an email address. This feature became very popular among iPod touch users who did not own mobile phones, as it allowed them to text their friends.

Reminders (personal digital assistance): Reminders was brought in on the iPod touch 4 as an alternative to Calendar or Clock alerts, and a way to create a virtual schedule day-by-day. Reminders allows users to schedule events by date, time, and month, similar to the Calendar application, but actually alerts the user when it is time to complete the task they have scheduled.

Game Center (gaming): The Game Center was added to the iPod touch 4 as a gaming leaderboard where users can create an account, add friends and access their scores while playing games on third-party applications. Users also gain a ranking on worldwide leaderboards where they can connect with other players of the game.

Newsstand (news): The Newsstand application was added as a way for users to read magazines and newspapers on their iPod touch, which they can download from the App Store. Users can also manage their magazine or newspaper subscriptions from the app.

Voice Memos (recording): Voice Memos allowed users to record important moments in their lives by utilizing the iPod touch's built-in microphone and recording audio files. These 'memos' can later be transferred onto a user's computer.

Camera: The Camera app works with the iPod touch 4's dual cameras to take pictures, record videos, and edit them all in one app. Similarly, there are synchronized sharing options within the app, so users can send their pictures to friends or post them on Facebook and Twitter with a tap of the screen.

Notification Center (notifications): The Notification Center is a central place where iPod touch users can view all of their notifications from third-party and built-in applications and mark them as read. It is an easy place to catch up on what you've missed, especially if you haven't used your iPod touch for a few hours.

Camera and Photos
The iPod touch 4G is the first iPod touch model to have not only one camera, but two, the front camera is 0.3mp and the back is 0.7mp but supports HD video recording at 720p. There are apps on the App Store that make the camera better.

Retina Display
The display on the iPod touch 4 is designed by Apple and manufactured by LG. It features a multi-touchscreen with pixel density of 326 pixels per inch (pip) and res of 960x640. The screen is marketed as a "Retina Display", based that 300 ppi at 12 inches from the eye is the maximum amount of detail the human retina can process.

Issues
Some iPod touch 4 users have experienced Wi-Fi signal dropping when texting and browsing the web. Other users experienced sound when recording video with wifi on.

October 2011 Model
On October 4th 2011 Apple announced a new white iPod touch, this model is still the 4th Generation iPod as it was the same specs as the 4th. All of its new features were from the new iOS 5 updated that was releases on October 12th.

5th generation
The iPod Touch (5th generation) is the latest iPod touch released.