All iOS users must have the Cydia application. Cydia download process is significantly different, But this website provides easiest tools and methods to download the Cydia. Just download the demo Cydia application from following link, Then you can upgrade it to full.
However Full functional Cydia is not available for iOS 8.4.1. Just go to semijb.com website to download the Cydia for iOS 8.4.1
Then you can upgrade it to full Cydia using the jailbreak membership account. iPhone / iPad and iPod Touch users cannot be the jailbreak with itself, and therefor need Windows and Mac computers to install the fully function Cydia to iOS Device.
Cydia Download compatibility
All iPhone / iPad and iPod Touch Devices fully compatible to have Cydia Download up to iOS 8.4 version.
Devices list – iPhone 6 Plus, iPhone 6, iPhone 5S, iPhone 5C, iPhone 5, iPhone 4S. iPad Air 2, iPad Air, iPad Mini 3, iPad Mini with retina (iPad Mini 2), iPad Mini, iPad 4, iPad 3, iPad 2, iPod touch 6 and iPod Touch 5
More about Cydia download
All iPhone / iPad and iPod Touch users are fully fit to have Cydia up to iOS 8.4 version. With TaiG 2 tool and PP 2 tools support iDevice users can apply Cydia to iOS 8.4 version. 1. 1.23 is the latest release of the Cydia installer and Saurik introduced new features of this version.
Cydia download process is depended on iOS Device and running iOS version and if you may apply incorrect jailbreak process, Cydia will not install properly. Therefore, users can take support from below guides to complete the successful jailbreak process.
This video will show you all about the Cydia download.