Various third-party developers continue to work on apps customized specifically for screens of the new iPhone 6 and iPhone 6 Plus.

The latest apps updated for the iPhone 6 series are Facebook, Skype and YouTube. On Wednesday, an update for the Retina HD display rolled out on these three popular iOS apps for the latest Apple iPhones.

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The Facebook iOS app now has a 16.0 version that includes graphical tweakings for Apple's 4.7-inch and 5.5-inch iPhones. It features smaller native fonts and decreases the user interface assets that are now proportional with the aspect ratio of the iPhone 6 series.

The popular social media site retained the usual appearance. They didn't inform users of the detailed changes made by the updates, however.

Facebook just reminded users that it'll bring bug fixes and performance improvements every two weeks.

Users can download the 70.5 MB FB app from App Store for free.

Skype rolled a 5.6 version for iOS that brings new features and general operational improvements. It includes support for the new screen sizes of iPhone 6 series.

The instant messaging app is introducing indicators in the Recents list and it modifies the number of contacts and time zones displayed on the contact profile.

Chat conversations can be marked as read or unread on each contact and its app sounds comply to global iOS "Do not disturb" rules.

The 65 MB Skype iOS version in now available to download from App Store for free.

YouTube's 2.13 version for iOS fixes the app's user interface and keyboard orientation issues.

Users will be able to use landscape keyboards while entering search terms in portrait mode. Scrolling different videos is now more responsive and includes the option to view all playlists when adding videos.

iPhone 6 series users can download the 20.4 MB YouTube for free from the iOS App store.

TagsYouTube, Skype, iOS app, iPhone 6 Plus