I everybody . I'm new here and English is not my native , so I apologize ... I'm beginning my studies soon and I need an app which will allow me to use annotations ( Notes , Markers etc). I also need good cloud support ( Dropbox) . After some research I have left 2 options , which you can see in the headline . I have tried a few other options before getting into those 2: -PDFReaderLite- Good , and does exactly what I need , but the Lite version allows only 10 documents and I 'm not sure about support on additional documents formats. If I need to pay for an application I prefer one of the popular apps . I have Office 2 HD but I can't edit PDF files Iannotate Free- It seems the export file does not include any annotations. It's important I'll be able to export the annotated docs with all the annotations , including the notes. If I'll be able to add annotations to different type of files , as Doc/Docx , it will be great too. I'm even not sure that the different value between those 2 apps (5$ & 10$) , is worth it . I didn't see any major advantages in PDF Expert compre to GoodReader . Thank you in advance !