If you only work on a specific brand (e.g., VAG group or Mercedes), you can create a portable database yourself.

If you want, I can convert this into a one-page printable PDF, a compact checklist-only version for USB, or a step-by-step mobile workflow — tell me which.

If you are searching for a fully functional, legal, and up-to-date version of TecDoc that is both free and portable, you are likely chasing a ghost. Here is why: