Amount of RAM in the Apple iPhone 6s, Apple iPhone 6s Plus and the Apple iPad Pro confirmed by Xcode
Images from Xcode seemingly confirm that Apple did indeed place 2GB of RAM in the iPhone 6s and iPhone 6s Plus, compared to the 1GB of RAM inside the Apple iPhone 6 and Apple iPhone 6 Plus. The larger amount of short term random access memory will allow iPhone users to more smoothly multitask between apps, and some graphic intensive games could run smoother. While top-shelf Android phones now offer 4GB of RAM, an Apple to apple comparison cannot be made. That is because iOS is optimized to run smoothly using less RAM than Android is.
Xcode also confirms that the 12.9-inch Apple iPad Pro, also unveiled last Wednesday, features 4GB of RAM. That is twice the amount that Apple installs on the Apple iPad Air 2. Apple's partner Adobe accidentally revealed last week that 4GB of RAM is used on the iPad Pro, but quickly pulled the reference on an online document.
source: @hamzasood via MacRumors