export a data file to a csv,pdf,txt,csv files

how to make app for working hours calculation and 

how to export a data file to a csv,pdf,txt,csv files



Oh dear. I was creating another post and this is garbled. Please ignore.



You do that by learning how to program.

The tutorials will help you learn to program, the AI2 book will teach you:   MITs tutorials    http://appinventor.mit.edu/explore/ai2/tutorials.html

AI2 free online eBook   http://www.appinventor.org/book2 ... the links are at the bottom of the Web page.

When you have a specific question, please return and you will get advice.   

you can use the file component to save data as txt or csv, see also the documentation

http://ai2.appinventor.mit.edu/reference/components/storage.html#File

for pdf see here

How to create a pdf file

btw. you should switch to App Inventor 2 as soon as possible, because App Inventor Classic will be switched off soon...