Cydia Impactor, like any other sideloading tool, is not stable at all times. Luckily, there are a couple of alternatives available so iOS users can still sideload apps without the Cydia Impactor tool. One of the more popular Cydia alternatives is Zestia.
Zestia, also known as X-Cydia, allows users to experience what Cydia can offer, to install semi-jailbreak apps on an iPhone or iPad without actually jailbreaking the device. The crackdown of Apple Inc on iOS vulnerabilities put the jailbreak community on the line, and it certainly is not the most secure thing one can do for their devices.
The closest thing to jailbreak one can enjoy is through tools like Cydia and Zestia. However, one must take note that Zestia, like Cydia, is not foolproof at all. Even so, it is good to keep at least a single alternative to unstable apps to get you covered.
How to install Zestia on iOS 10.2, 10.2.1, 10.3.3 without jailbreak
In this tutorial, you will be guided how to install Cydia alternative Zestia on iPhone or iPad without needing jailbreak. Below is the step-by-step guide:
Step 1: Open the Safari browser and put this address in the URL box: zestia.lmdinteractive.com.
Step 2: If you're installing Zestia directly from your device, select Install Zestia.
Step 3: Select Install the Profile. The installation process will begin and it could take several minutes for it to finish.
Step 4: Tap on the Cydia icon to launch the tool. A long list of apps will appear so you can choose which ones you would want on your iPhone or iPad.
Step 5: Go to Device Settings > General > Profile > Trust.
Zestia or X-Cydia should now be functional on the device.