Best app to merge and split PDF files.
It has the following advantages:
•Works offline;
•No ads, commercials or full-screen banners;
•Possibility to select multiple PDF files for merging or splitting;
•Uses latest Google libraries for parsing PDF documents and building a secure application;
• The selected files can be removed or relocated using menu options or drag and drop principles;
To remove the selected file: long press and swipe left or right, for PDF relocation swipe up or down;
Merging PDF files may take some time to finish, make sure you have all the background apps closed.
There are two ways to directly select PDF files: a custom popup file picker and a native one, to select which one to use check settings view.
Note: If you have a weak device don't select too many files, the app may crash because of low RAM memory;
Application doesn't support password protected or broken PDF files

// Option A //

To download Multiple PDF Merger mod from HappyMod.com.
You need enable the option "Unknown Sources".
1. Click on the above link to download Multiple PDF Merger mod APK.
2. Save the file in your device Downloads folder.
3. Now tap on Install and wait for the installation to finish.
4. Once it is done, open the game and start playing it right away.

// Option B //

To download Multiple PDF Merger from HappyMod APP, you can follow this:
1. Open your browser and download the HappyMod APK file from HappyMod.com - the only official website of HappyMod.
2. Open Android Settings and go into Privacy or Security.
3. Tap the option to Allow Unknown Sources and enable it.
4. Go to your Android downloads and tap the APK file.
5. Follow the directions on the screen to install it.
6. Search Multiple PDF Merger in HappyMod App.