Allplan Engineering is described as 'The software’s particular strength lies in the three-dimensional general arrangement and reinforcement design. With this, the building construction is carried out in advance, so that discrepancies and conflicts are already visible in the planning phase'. There are more than 10 alternatives to Allplan Engineering for a variety of platforms, including Windows, Mac, Linux, Online / Web-based and Android Tablet. The best alternative is FreeCAD, which is both free and Open Source. Other great apps like Allplan Engineering are SketchUp (Freemium), BricsCAD (Paid), ArchiCAD (Paid) and Assetforge (Paid).
IDEA Architecture is a low-cost 3D Architectural Software renown by experts to be the BIM Software offering the easiest transition for AutoCAD users. 2 software in 1: 3D Architectural Design but also a full CAD software.