There are a few ways to write on a pdf on android. The first way is to use the pdf viewer app that comes with the android operating system. This app can be found in the app store and is free to download. The second way is to use a third party pdf reader. These readers can be found in the app store or online and cost money. The third way is to use a computer program that can write on pdfs. These programs can be found online or in the app store. ..
