Avid iOS jailbreak fans are in for some good news as they can now enjoy Cydia-like experience using Zestia (aka X-Cydia) without actually jailbreaking their device. With Apple constantly patching up all known jailbreak exploits in its subsequent iOS updates, the jailbreak community is forced to look for alternative means of experiencing Cydia apps and the Zestia is a better option than using the bare-minimum stock iOS.
Here is the complete step-by-step guide to install Zestia and feel the semi-jailbreak kind of experience on your iPhone or iPad:
Step 1: Open the URL: zestia.Imdinteractive.com on your iOS device via the Safari browser and hit Install Zestia button as depicted in the screenshot below.
Step 2: Then hit Install on the Profile page and enter your security PIN when prompted.
Step 3: Tap on Install button a couple of times more and then hit Done.
Step 4: Now hit the Home button and a new Zestia icon should appear on the Home screen. Just tap on the icon to launch Zestia.
Step 5: You can now select the app you wish to install and follow the onscreen instructions to complete the setup. Note: The apps could be installed in a way similar to those you download from the App Store.
Step 6: Open the Settings app and then select General > Profile and finally choose the name of the app you just installed.
Step 7: Now select the Trust option and then choose Trust again to confirm the action.
Step 8: You can now launch your freshly downloaded app.
That's it. You can now explore a plethora of exclusive apps on Zestia, which will never be available via App Store.
[Source: Redmond Pie]