The thing i like the most is i can edit any pdf easily and save it for future use and lock the file easily

Adobe Acrobat DC is a well-known choice for a wide range of PDF tasks, offering powerful features and seamless integration with other Adobe software. However, it's worth noting that it can be on the expensive side. Foxit PhantomPDF provides an affordable alternative to Adobe Acrobat, boasting similar capabilities, user-friendliness, and strong collaborative and security tools. Nitro Pro strikes a balance between features and value, with numerous editing and conversion options, a user-friendly interface, and robust collaboration features. PDFelement is an affordable and easy-to-use option, particularly suited for basic to intermediate PDF editing needs. PDF-XChange Editor stands out for its speed and annotation tools at a competitive price point. Lastly, Smallpdf is an online platform ideal for quick, hassle-free PDF tasks, though it may lack some of the advanced features found in desktop solutions. The choice among these options depends on your specific requirements, budget, and the frequency of your PDF-related tasks. To ensure the most up-to-date information, consider checking the latest reviews and updates for these software choices.

It is very easy to use,very user friendly