Hi Abira,
If I understand correctly that you want to download a file in your mobile app saved in your database, you don't need to have a dummy page to download it on the Traditional Web.
You can on your mobile screen action call a server action which gets the binary data from the DB via query and returns the binary data. After that you can use, for instance, the Save File action from FilePlugin forge component to save the binary data in your device.

In order to understand how to use File Plugin forge component, there is the File Sample App forge component.
Keep in mind that after your mobile application uses the File Plugin it will need to be regenerated and downloaded again to the phone so it can use the new plugin.
Kind Regards,
João