Instead of searching for a nonexistent portable Power BI, adopt this hybrid workflow:
While not a "portable app" in the traditional sense, you can install Power BI Desktop to a non-system drive (like a USB flash drive or external SSD). Power Bi Portable Version
: Ensure your data is in Import Mode rather than DirectQuery. This embeds the data directly into the file, allowing you to move the file between computers without needing access to the original database. Instead of searching for a nonexistent portable Power
Understanding why a portable version doesn't exist helps you appreciate the workarounds. Power Bi Portable Version