The purpose of jailbreaking iOS 11 devices for many users is to get Cydia. It is because of amazing apps Cydia is packed with. Winterboard is one of them which allow users to customize the iOS by changing the themes.
By default, Appel does not allow iOS users to even change the font of iOS 11.1.2 or iOS 11.3, leave alone changing theme.
Winterboard is amazing Cydia tweak that is basically a theme engine. It has lot of themes for iOS devices. Users can either try out free Winterboard themes for iOS 11 or buy the paid ones.
How to Install Winterboard Themes for iOS 11.1.2/11.3 for Free Without Jailbreak
Good news is that Winterboard can also be installed without jailbreak for free on iPhone/iPad running on iOS 11.1.2 or iOS 11.3. The precedure is pretty straight-forward and easy to follow.
Step 1: Download and Install Cydia on your iPhone without jailbreak using iNoCydia.
Step 2: Launch Cydia on your iPhone running on iOS 11.1.2/11.3.
Step 3: Search for Winterboard Themes for iOS 11.
Step 4: Proceed with its installation.
When installation is completed, launch Winterboard and start searching for your favorite theme. Let us know which theme you applied on your iOS 11 iDevice with Winterboard.