Diablo 4 Builder is a free Android app developed by YJB that helps players build and customize their skills for Diablo 4. The app is compatible with Android 13.0 and supports both Korean and English languages.

The app offers a variety of features, including listing all skills of the five jobs, the ability to take a picture of the paragon board in advance, and the option to engrave the Codex of Power and the Legendary Aspect on your equipment. You can also set it as a unique item, including ancestral. Additionally, the app provides a detailed description of the special abilities of each job and summons, which will be updated soon.

The user interface of the app is intuitive and convenient, allowing you to access everything with just a click or two of a button. The app also offers a function to collect selected skills and create them as an image, and you can save and load your own skillset, paragon, aspect, and more. Searching for specific skills is also made easy, as the app activates only the related technologies. The app promises to respond quickly to all issues, such as the beta in May 2023 and official release in June, and will try to reflect the information as soon as it is disclosed.