IOS

iOS is a mobile operating system developed by Apple Inc. Based on Apple's OS X (an operating system for Macintosh computers), iOS serves as the operating environment for the iPhone, iPod Touch, and iPad. As of Q4 2010, iOS ranks 3rd place in global smartphone sales. iOS is notable for the numerous applications in its App Store; in fact, for many, this large assortment of "apps" is the main draw to the iOS platform. Like many video game publishers, Sega has released a number of titles for the iOS platform, including games based on the Sonic franchise.

Sonic Games for iOS

 * Sonic Spinball
 * Sonic the Hedgehog
 * Sonic the Hedgehog 2
 * Sonic at the Olympic Winter Games
 * Sonic the Hedgehog 4: Episode I
 * Sonic the Hedgehog 4: Episode II
 * Sonic CD
 * Sonic & SEGA All-Stars Racing
 * Sonic 20th Anniversary
 * Sonic Freehand
 * Sonic the Hedgehog 4 Demo
 * Sonic the Hedgehog Skins
 * Sonic Jump
 * Sonic Dash
 * Sonic & All-Stars Racing: Transformed