You've been using the PDF
format for decades now, and when mobile devices started getting smarter, you eventually got an app as well. But it's been some years since anything major happened to the Adobe
Reader app, but now they're making up for almost 5 years of inactivity by redesigning the entire Android app, and renaming it to Acrobat DC. No, the company has not been bought by a comic book publisher, but it stands for Document Cloud.