This desktop app is created using Python (tkinter for GUI).
You can add activity with date in this app.
I have uploaded TO_DO_APP folder in which there is a file todo.exe. By running this file you can use this app and make sure not to delete any file from TO_DO_APP folder otherwise it will not work.
You nedd to download only TO_DO_APP folder to use the application.
If you want to see the code then you can download frontend.py and backend.py file.
