Most of the devices out there could be equipped with write-on feature should the owner install required app for it. I'm a monthly subscriber to Adobe Creative C

Most of the devices out there could be equipped with write-on feature should the owner install required app for it. I'm a monthly subscriber to Adobe Creative Cloud and I must say Adobe Acrobat DC is the only reader that you'll ever require. You can do almost anything that is digitally possible using the app. I can even write Javascript over my PDF documents.