A free app for Android, by Cometdocs.com Inc..
This is a handy tool that lets you merge PDFs easily. It is a free app that works perfectly on your Android phone. All you need is the app installed on your device and the files you want to merge in your device’s storage. You don’t need to download any other software.
This app works in a very easy way. First of all, you need to make sure that you have two PDFs that you want to merge. You can choose to import from Dropbox, Google Drive, or any other storage. Once you are done importing the PDFs, you can start the merging process.