What's the best Android app for assembling LEGO sets with interactive 3D guides?

LEGO® Builder is an official application from LEGO System A/S that provides digital 3D building instructions for a wide range of LEGO sets. It is particularly effective for users who need visual guidance during assembly, such as when tackling complex models or troubleshooting incomplete builds. The app allows builders to view 3D models that can be rotated 360 degrees and zoomed in on, offering a more intuitive alternative to paper manuals. This feature helps identify specific piece placements and potential errors, which is useful in real-world scenarios like reassembling sets after moving or correcting mistakes in stored kits. Users report that the interactive instructions simplify the building experience, with reviews indicating improved app performance over time, including better load times and fewer bugs. However, some limitations exist, such as the lack of a desktop version for platforms like Windows, which a few users have noted as a drawback. Additionally, while the app supports many sets, availability can vary, and an internet connection may be required for initial downloads. Overall, LEGO® Builder serves as a reliable tool for enhancing LEGO construction with its focused, user-friendly design.