D4Planner is an unofficial tool designed to assist players in planning and sharing their character builds for Diablo IV. With this app, users can create and share skill builds using an interactive skill calculator, as well as experiment with item builds by equipping various legendary aspects and powerful unique items. Additionally, the app offers an interactive map that allows users to locate and track Altars of Lilith, Quests, Dungeons, Aspects, Events, and Bosses.

This tool is especially useful for players who want to prepare for the release of Diablo 4 by planning out their character build in advance. By using D4Planner, players can conveniently track their Diablo 4 world progress and never miss a World Boss, Helltide, or Legion event by subscribing to push notifications.

It's important to note that D4Planner is not affiliated with Blizzard Entertainment, the developer of Diablo 4.