IPod touch (4th generation)

The iPod touch (4th generation) was originally released on September 12, 2010 with just a black model, but later a new white model was added on October 12, 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 many new features from the iPhone 4, including a Retina Display, a FaceTime Camera, and a 720p HD iSight camera. The iPod touch 4 is 26% thinner than the iPod touch 3. The iPod touch 4 came in black and white included first the iOS 4.0 and later the iOS5.0 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. 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.

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.

The iPod touch 4 supports iOS 4 through iOS 6.

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.

The older, original iPod touch 4th generation (not originally with iMessage installed), doesn't work with some docking stations.

iPod touch 4th generation models manufactured after a certain date shipped with iOS 6, and due to manufacturing differences, cannot be downgraded like previous models as a result of driver incompatibilities.

White Model
On October 4, 2011 Apple announced a new white iPod touch, which was still from the 4th generation iPod touch family as it had the same specs as the original black one. All of its new features were from the new iOS 5 update that was released on October 12, 2011.

iOS 6.