Step 4: Save Changes

Once we have made our modifications, we need to save the changes. Tap on the “Save” button in the top-right corner of the screen and confirm that we want to save the changes. The changes will now be applied to our WhatsApp app.

Why Modify iOS Applications?

There are several reasons why you may need to modify existing applications on your device:

• Adding new features: If you are a developer, you may want to add new features to an existing application to enhance its functionality and usability. This can include adding new UI elements, improving the app’s performance, or integrating new technologies.
• Fixing bugs: Sometimes, applications may have bugs that cause them to crash, freeze, or behave unexpectedly. By modifying the code, you may be able to identify and fix these issues.
• Improving user experience: Modifying an application can help improve the overall user experience by making it easier to navigate, more visually appealing, or simply more intuitive to use.
• Customizing apps: iOS devices allow users to customize many aspects of their devices, including applications. By modifying an app, you may be able to change its appearance, add new features, or improve its performance.

How to Modify iOS Applications

There are several ways to modify iOS applications on your device:

1. Jailbreaking: Jailbreaking is the process of modifying the firmware on your iOS device to gain access to features and capabilities not available in the official version of the operating system. This allows you to install third-party applications, modify existing apps, and customize the user interface.



2. Rooting: Rooting is similar to jailbreaking but involves gaining root access on an Android device. This allows you to access system-level files and modify them as needed. While there are no official iOS devices that support rooting, it is possible to root unofficial devices using tools such as Checkra1n.
3. Modifying the code: If you have programming skills, you can modify the code of an application directly. This allows you to add new features, fix bugs, or change the behavior of the app. To do this, you will need to obtain the source code for the app and have experience with the language used to develop it.
4. Using third-party tools: There are many third-party tools available that can help you modify iOS applications without modifying the code directly. These tools include app editors, debuggers, and reverse engineers. Some popular examples include AppCryptor, AppSpy, and ReverseEngineerX86.

Case Study: Modifying the WhatsApp UI

Let’s take a look at an example of how to modify the WhatsApp UI using third-party tools.

Step 1: Install AppSpy

First, we need to install AppSpy on our iOS device. To do this, open the App Store app and search for “AppSpy”. Install the app and launch it.

Step 2: Connect to WhatsApp

Next, we need to connect AppSpy to our WhatsApp account. Open AppSpy and tap on the “Add” button in the top-right corner of the screen. Choose “WhatsApp” as the app you want to modify and enter your WhatsApp phone number.