This is a simple file converter, JPG to PDF, of course, you can also use the camera as a Scanner to take photos and convert to PDF file.
Features are:

Note that the Android 11 version requires higher write permissions, so the functions of converting PDF to JPG and sending compressed files have been removed.

App Output folders:
/storage/emulated/0/Android/data/tw.tn.ted.ttrpdfjpg/files/
subfolders as below:

jpg2pdf
scan2pdf

JPG2PDF Tab
1.You can add multi files.

2. The minus button to clear the screen of all added items ,you can also uncheck small box or move item to left or right to remove.

3. You can change the order of items by long press item to move up or move down.

4. Short Click the item to view the file contents.

5. Click on the conversion button,will Convert to PDF file.

6.When conversion is processing,you can stop current conversion task by pressing back key.

SCAN2PDF Tab
Operation is the same above.
Use Camera to take pictures and convert to a PDF file.

set up
Three parts:
1.JPG2PDF SCAN2PDF: PDF size, image size fit with PDF size, PDF portrait or landscape orientation, rotation angle, quick camera resolution.