Browser Extensions
- Pros: PC/Mac integration, filtering options.
- Cons: Don't work on mobile, sometimes complex, variable privacy.
PDF Finder: The Mobile Approach
- Pros: Mobile First, natural "Share" integration, powerful Recursive Scan (Pro).
- Cons: Android only.
Conclusion
If you often use your smartphone to check your courses or do research, PDF Finder is the most practical and fastest choice.