Most universities with statistics departments have a campus-wide license for IBM SPSS, including Amos.
While finding a "forever free" version of professional software like IBM SPSS Amos 23 is difficult because it is proprietary commercial software, there are several legitimate ways to access it for free or at a significantly reduced cost. Legitimate Ways to Get IBM SPSS Amos 23 Installing SPSS Amos – Software Available to Campus Ibm Spss Amos 23 Free - Download
IBM offers a of the latest SPSS Amos version (currently v29 or v30). This is 100% legal and safe. This is 100% legal and safe
No official portable version exists. Portable versions on pirate sites are almost always infected. Avoid them. Avoid them
IBM SPSS Amos 23 offers a wide range of features that make it a powerful tool for data analysis. Some of its key features include: