Cydia is the most popular 3rd party application manager of the world.
Cydia Download process is somewhat different. You cannot download the full functional Cydia directly to your iOS device. You must jailbreak (Full jailbreak or Semi Jailbreak) your device to download the Cydia, Please use following jailbreak tools according to your iOS version, All of these tools install Cydia automatically after the jailbreak process.
Go to Settings , General, About and check the version to find your iOS version
Full functional Cydia is not available for iOS 8.4.1 at this time. Please downgrade your iOS 8.4.1 device to iOS 8.4 to download the Cydia.
iOS 8.1.3 , iOS 8.2 , iOS 8.3 and iOS 8.4 users can use following Jailbreak tools for download the Cydia, These tools install the Cydia automatically after the jailbreak, These is no any other method to install Cydia to these users.
Semi jailbreak is also compatible with iOS 8.1.3 – iOS 8.4 devices, But full functional cydia is not available with Semi Jailbreak, Just visit semijb.com from your iOS device to install the cydia if you don’t want to use Windows/Mac computer for your jailbreak process.
iOS 8 to iOS 8.1.2 users can use Pangu8 jailbreak tool. Pangu8 tool also installs the Cydia after the JB process.
Guides – Cydia for iOS 8
iOS 7.1 , 7.1.1 and 7.1.2 users can install the Cydia through Pangu software. Pangu tool is different from Pangu 8. You must use Pangu software if you are iphone 4 user because iOS 7.1.2 is the latest iOS version for iPhone 4
Guides – Cydia for iOS 7.1.2
iOS 7 to iOS7.0.6 users can use evasi0n7 Jailbreak tool to install the Cydia. It downloads aromatically after the evasi0n JB process.
p0sixspwn tool allows you to download the Cydia after the iOS 6 – 6.1.6 Jailbreak, Download the p0sixspwn tool according to your computer OS from following links
Alternative ways to download and install the Cydia
Cydia Open App market – This is not a real way to install the Cydia, Open App market provided web based applications for Android and iOS. Many developers had uploaded fake Cydia apps to open apps market, Now open app marker has been closed by the developers,