Xcode confirms 2 GB RAM for iPhone 6s and iPhone 6s Plus, 4 GB RAM for iPad Pro

Benjamin Mayo, writing for 9to5mac, on why this upgrade from 1 GB to 2 GB on the iPhone 6s and Plus matters:

RAM upgrades for the iPhones has been somewhat overdue, with many complaining apps have to relaunch too frequently on current hardware, especially on the iPhone 6 Plus. RAM affects how much app data the device can keep in memory at once. This is often seen through the number of tabs Safari can open before having to reload a website. More RAM (obviously) provides a better experience across the system. The iPhone has been stuck on 1 GB RAM since the iPhone 5 in 2012.

Read on if you are interested in how this was discovered.

Note that the onboard RAM (actually onboard the 64-bit A9 chip) is what is used by iOS to run your apps, move your data around.

This RAM is not the same as the long-term storage that holds your photos/music/etc. A 16 GB iPhone 6s has the same amount of onboard RAM (now 2 GB) as a 128 GB iPhone 6s.