IPhone OS 1

iPhone OS 1, retroactively referred to as iOS 1, was the first major version of iOS to be publicly released by Apple. Launched on June 29, 2007, it is the mobile operating system that was developed from Mac OS X for use on first generation iPod touches and first-generation iPhones.

Trivia

 * This was originally called iPhone OS 1.0.
 * Before the name iPhone OS, Apple said the iPhone runs a version of OS X.
 * This is the first iOS to feature its first-ever firmware.
 * This is also the first iOS to feature iTunes.
 * iTunes was first featured on iPhone OS 1.1.1.

iPhones

 * iPhone (1st generation)

iPod

 * iPod (1st generation)