You just need a browser. The app lets you split and edit PDFs. You can select the files you want to merge. You can add text, photos and videos. Furthermore, you can send files to another device and then preview them on your phone while you're writing. This app also allows you to split a file into its individual pages, which you can then send to another computer. Then you can read the file locally on your phone again. You can send multiple files to another device, convert them, use an automatic PDF transform and then merge them back into a single PDF file again or vice versa. The whole process happens with the mobile app. If you want the PDFs to be merged, you also need to download their contents on the other device as well. Foxily — Download | Demo Foxily gives you the ability to convert any file into a PDF and back again, and allows you to upload multiple PDF files in one go. The PDFs are encrypted. You can also choose to save your documents directly onto the disk, which allows you to save disk space. Foxily is available from 5.99, or you can download it for free. If you prefer, you can try a beta version, which is priced at 9.99. Parallels Bridge — Android Parallels Bridge is a free app that allows you to edit, view and share Microsoft Office documents, documents and images. You can view, edit and save PDFs in Parallels for Mac, including multiple documents simultaneously in different views (side, table and grid view). You can open PowerPoint Presentations directly from Adobe PDFs. Parallels Bridge has a PDF editor too — an option not available in the other apps I've looked at here. The app has a lot of support for Microsoft Office formats too, such as PDF, XPS, and ODT. I haven't tried this app for Windows. Parallels Bridge has a lot of functionality on Mac and Linux too. Parallels Bridge is available from 24 for a single user account. Subsequent users can sign up for a single user account from 14. Parallels Bridge is paid, but it might be worth a look if you need to edit and view Microsoft Office documents. Omnibus Fusion Desktop — Download | Demo Omnibus is a free application that is available from Google Play.