How we ranked the 100 best iPhone apps of all time

When the App Store first launched in 2008, there were only a couple hundreds apps. Today there are well over a million.

Whittling those down to the 100 best iPhone apps of all time was not an easy task.

We began with a group of Mashable writers and editors — many of whom have been following the App Store from the very beginning — and asked them to recall their favorite apps, the apps that changed their lives and changed the game for other developers; the apps that shaped the conversation — if only for a short time — and those they still can’t go without.