Just because your iPhone is now jailbroken, doesn’t mean you can install anything right away.
AppSync Unified is a tweak that patches installd to allow for the installation of fakesigned IPA packages on an iOS device.
AppSync is a popular tweak, known to help jailbroken users install anything they want. From cracked .ipa to universal apps via Safari. But we don’t recommend you use it for piracy purposes.
Here’s a real life example that AppSync is good for:
If you are a developer and need to test your apps before submitting it to the App Store. AppSync will help you do that.
…can be used to downgrade or clone installed apps, to download fakesigned IPAs (often emulators), and also to assist in the development of iOS applications using Xcode 6 or below.
Without further ado, here is how to install AppSync on the latest Jailbreak (iOS 9.3.3) and lower.
How to Install AppSync on iOS 9.x
Step 1: Open Cydia > Sources
Step 2: Tap Edit and choose Add
Step 3: Enter the following URL: http://cydia.angelxwind.net/
Step 4: When done adding Karen’s repo, refresh Cydia
Step 5: You can either go straight to the new repo or using the Search feature. Look for AppSync Unified
It should say that your iPhone or iPad is compatible and install it. Wait for the installing process to begin and end with a visible Respring button. After that, it should work out of the box, meaning there is no options to set.
I forgot to mention that this tweak was developed by developer Karen (@angelXwind on Twitter). Be sure to follow her and keep yourself updated.