Adobe reader is very useful. As I am a student so I have to read and edit different lectures in PDF files, this software always helps me for my purposes. Adobe reader is fast and is available on Android, Windows and iOS as well. Adobe reader has some amazing features which differs it from other softwares. You can make new lectures or notes and can also edit in previous lectures or notes in better way. You can make them more brighter and attractive. You can add colors. You can highlight your specific sentences and paragraphs easily. You should download it in your mobile, laptop, tablet or PC wahatever you use. Intall it and make your work more easier than ever.