MacTracker is a database with information about any product/software ever developed by Apple

  MacTracker is an application for iDevices available for some time in the App Store that helps you find out everything you need to know about any Apple product ever made. The application is based on a website on which there is a database with absolutely all Macs and iDevices manufactured by the Apple company over the three decades of its existence. However, the application is not limited to physical products because through it you can also find out useful information about the software developed by Apple for its own products, so you have an Apple encyclopedia right in your hands.

Mactracker provides detailed information on every Apple Macintosh computer ever made, including items such as processor speed, memory, optical drives, graphic cards, supported Mac OS versions, and expansion options. Also included is information on Apple mice, keyboards, displays, printers, iPod, iPad, Apple TV, iPhone, Newton, Wi-Fi Cards/Base Stations, iOS and Mac OS versions.

  MacTracker is available for free in the App Store, but unfortunately it only works on iPhone/iPod Touch.