PDF Ink - Sign, Fill, Edit

PDF Ink is a great productivity app that lets you fill in PDFs with ink, text, and signatures. Users can use this PDF app to view and convert word files to PDF so that they can add text to it. PDF Ink supports users to save multiple signatures. No ads will show in this app.

It's easy and free to use. If you have an active pen, just open your PDF files, and start writing what you want, no other things will be needed. If you want to use your finger on your touchscreen or want to use a passive pen, or you want to draw with your mouse or trackpad, just enable the inking mode and then start your writing.