iPhone OS 1

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<div style="font: bold 2em/1.2 -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Helvetica Neue', Helvetica, Arial, sans-serif; color: var(--wiki-color);">iPhone OS 1</div>
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! class="ios-lab" | Developer
| class="ios-val" | [[Apple]]
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! class="ios-lab" | Announced
| class="ios-val" | January 9, 2007 (with the iPhone)
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! class="ios-lab" | Initial release
| class="ios-val" | June 29, 2007
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! class="ios-lab" | Final release
| class="ios-val" | 1.1.5 (July 15, 2008)
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! class="ios-lab" | Launch devices
| class="ios-val" | [[iPhone (1st generation)]] · iPod touch (1st gen)
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! class="ios-lab" | Succeeded by
| class="ios-val" | [[iPhone OS 2]]
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{{iOS Version Navbox}}

iPhone OS 1 is the first release of what is now [[iOS]], the mobile operating system [[Apple]] shipped on the [[iPhone (1st generation)|original iPhone]] on June 29, 2007. At launch it had no version branding at all: [[Steve Jobs]] introduced the phone as running "OS X," and Apple's early materials avoided naming the system entirely. The retroactive name "iPhone OS 1" settled in once iPhone OS 2 formalized the versioning in 2008.

Whatever its name, the software was the iPhone's real revolution. It brought a desktop-class WebKit browser, capacitive multi-touch with inertial scrolling and pinch-to-zoom, visual voicemail, and a fixed grid of core apps — and it did so with no native third-party apps, no App Store, no copy and paste, no MMS, and no home-screen customization. Jobs's answer to developers — write web apps for Safari — held for exactly one year before the [[App Store]] reversed it.

= Features =

The launch system shipped sixteen apps — Phone, Mail, Safari, iPod, Messages (SMS only), Calendar, Photos, Camera, YouTube, Stocks, Maps (Google-backed), Weather, Notes, Clock, Calculator, and Settings — plus multi-touch text handling with the magnifying-glass loupe and predictive keyboard. Its interaction fundamentals (tap, swipe, pinch, momentum scrolling with rubber-band edges) were the product's patent-guarded crown jewels, and its animations ran at a fluidity no 2007 competitor approached.

Point updates added the iTunes Wi-Fi Music Store (1.1.1), and — in the January 2008 "1.1.3" update, a $19.99 paid upgrade for iPod touch owners — home-screen rearrangement, web clips, and multi-recipient SMS.

= Supported devices =

The original [[iPhone (1st generation)|iPhone]] and the first-generation iPod touch. Both were later eligible for [[iPhone OS 2]] and [[iPhone OS 3]] (the iPod touch via paid upgrades).

= Legacy =

iPhone OS 1 is the ancestor of every modern smartphone interface: its multi-touch grammar and app-grid home screen became the industry's defaults within two years. Its restrictions defined the platform's early identity fights — the jailbreak community formed around them almost immediately — and their reversal, the [[App Store]] in [[iPhone OS 2]], created the app economy. The system's direct descendants run today as [[iOS 26]] and its sibling platforms.
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