Men Varaosat Oy review for PartFinder: Year Make Model

Did I understood correctly, here is no models, no cross-references, this is clean windows where I need to build every think by myself? How it's possibly on Automotive side? I have 300 000 products by producer number and on tecdoc I can only import my numbers and it crossing them to vehicle model year and OE-numbers. Can somebody give advice which App is like TecDoc?