Guidia 4 is an iPhone application developed by Jin Bum Shin. It is a free program in the Education & Reference category, specifically designed for Diablo 4 players. With Guidia 4, players can easily plan and optimize their character builds by accessing a wide range of skills and abilities.

The program offers a variety of features to enhance the user experience. It includes a comprehensive list of skills for all five jobs, allowing players to explore different playstyles and strategies. Additionally, players can preview the paragon board and even engrave the Codex of Power and Legendary Aspect on their equipment. The ability to set unique items and the upcoming updates on job special abilities and summons further add to the program's variety.

One of the standout features of Guidia 4 is its convenience. The user interface is intuitive and provides quick access to skill descriptions and connections. Unlike other builders, where you have to click on each icon to view the skill description, Guidia 4 displays them at a glance. The program also offers the option to save and load customized skillsets, paragon points, aspects, and more. Searching for specific build types, such as "Thorn Barbarian," is made easy with the program's skill activation feature.

Guidia 4 also supports multiple languages, including Korean and English. Players can effortlessly switch between the two languages, making it convenient for a diverse user base. Furthermore, the developer, Jin Bum Shin, is committed to providing steady updates and addressing any issues promptly. This ensures that players have access to the most up-to-date information for their Diablo 4 builds.

Overall, Guidia 4 is a convenient and comprehensive skill builder for Diablo 4 players. Its user-friendly interface, extensive skill database, and continuous updates make it an essential tool for optimizing character builds in the game.