Path of Building is a free utility and tool application developed by hungrymole for Android devices. It is a comprehensive tool that helps users plan and optimize their builds in the popular online action role-playing game Path of Exile.

The app is easy to use and features a clean and straightforward interface. It offers a wide range of features, including skill tree planning, item customization, and DPS calculation. Users can create and save multiple builds, compare them side by side, and share them with others.

However, it's worth noting that the app currently does not support switching build specs or crafting items. Despite this limitation, Path of Building is still a useful tool for any Path of Exile player looking to optimize their builds.