Apple's mobile software has changed a lot since the first iPhone was unveiled in 2007.
Most people remember the polarizing flat design of iOS 7, but it can be tough to remember all the little changes that happened throughout the entire evolution of Apple's iPhone software.
From the first time Apple announced the App Store to the unveiling of Siri, here's how the iPhone's homescreen has changed through the years.
iPhone OS 1.0
Apple unveiled the original iPhone on January 9, 2007, and Steve Jobs said it was running a version of "OS X," the same software running on Apple's Mac computers. Apple later referred to its software as "iPhone OS" when it opened up the software to developers.
But there was no App Store on the original iPhone when it launched, and you couldn't download any third-party apps.
iPhone OS 2.0
Apple's second-generation iPhone, the iPhone 3G, shipped in July 2008 with iPhone OS 2.0 installed. Owners of the original iPhone could upgrade to iPhone OS 2.0, and it was worth it — this was when Apple introduced its App Store, and upgrading was the only way to gain access to the third-party apps that are partially responsible for turning the iPhone into a smash hit.
iPhone OS 3.0
Apple's iPhone OS 3.0 software launched in June 2009 and came pre-installed on the iPhone 3GS. The new software allowed iPhone owners to copy and paste text for the first time, and introduced the first landscape keyboard for messaging. Interestingly enough, many iPhone users today prefer texting while their phones remain in portrait mode.
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