The official version of is a paid software for creating electronic circuit diagrams, developed by ABACOM . While the full version requires a purchase, a free viewer is available for opening and printing files. Official Download & Purchase Options

The full version can be purchased for €45 on sites like Reichelt or the Electronic-Software-Shop . No license key is typically required for the full version; it just needs to be installed.

There are two primary legitimate ways to "download" the software:

MegaCAD (the parent company) transitioned to a Windows-native software called "Splan Professional" and later "Splan 3D." They no longer support or distribute the DOS-based Splan 80. All official support ended around 2005. Consequently, any website promising a direct "splan80.exe" or "setup.exe" is hosting abandonware—software whose copyright is technically still valid but is no longer sold or supported.