Beats has officially launched it music streaming service for iOS devices. Like most mobile streaming services, Beats Music does not offer a free, ad-supported option. Instead, users must subscribe for $9.99 a month. The subscription service offers on-demand access to a library of around 20 million songs.

Beats has teamed up with veteran radio programmers Julie Pilat and Scott Plagenhoef to oversee a large list of "music experts" who will curate channels of handpicked music for a variety of situations. For example, the Beats Music "Highlights" section offers quick access to new music picked by famous DJs and music journalists. The app also features an option that will select the appropriate tracks based on what you're doing and where you're located.

Ryan Petrich's jailbreak tweak BrowserChooser has been updated to support iOS 7. The tweak allows users to make Google Chrome, Opera Mini, iCab Mobile, Dolphin Browser or Atomic Browser their default browser instead of Safari. This tweak is even better when paired with the jailbreak tweak Nitrous.

Third-party browsers are not as fast as Safari because Apple restricts access to the Nitro JavaScript engine in iOS. Nitrous unlocks the faster JIT compiler making other applications like Chrome, Facebook and Twitter 4-to-5x faster.

The new iOS 7 App Switcher leaves a lot of room for improvement and there are several tweaks out there that let you customize it a bit. SlideForUsage gives you information on each app's usage, while SwipeDown lets you close apps by, you guessed it, swiping down. If you prefer the iOS 6 App Switcher, you can download ClassicSwitcher.

You can download SlideForUsage for free from Cydia's modmyi repository. Once you have it installed you can go to Settings->SlideForUsage. Your only option is to change the color of the text that the information is displayed with. With this tweak installed you can now go to the App Switcher and slide an app preview card down to

Apple has released iOS 7.1 beta 4 to developers this morning. The update is available OTA or via Apple's developer page. The update carries the build number 11D5134c. The fourth beta was released only a few weeks after iOS 7.1 beta 3 became available.

So far not many big changes have been reported. iDownloadblog has spotted a new slide to unlock animation, and new Siri voice options in the UK. There is also a bug fix for Messages that caused a send failure immediately after sending. Check out the complete iOS 7.1 beta 4 release notes below.

The biggest news for Apple (NASDAQ: AAPL) and its shareholders last week was the debut of the iPhone in China. On Friday, China Mobile, the world's largest carrier with over 750 million subscribers, began selling the iPhone 5c and 5s. Pre-orders for the devices began in December and reached 1 million. Analysts expect China Mobile to sell anywhere from 10 million to 15 million iPhones this year. You can read more about this here.

The 2013 Q4 numbers also came in last week and, according to market research company NPD Group, Apple saw significant gains. Apple's market share grew from 35% in Q4 2012 to 42% in Q4 2013. NPD also found that smart phone ownership is growing, claiming six out of ten phones, up from 52% last year. As would be