database backup for free version

Is there a way to activate the backup procedure for free apps or should this start as soon as you deploy the app? I'm revisiting an app I developed a year ago for testing purposes and can't find any recent backup of it, the last one is dated over a year ago. Also any new free app I deploy does not have any backups.
1 answers

As it says: Backups are automatically created every night and retained for 2 weeks. 

When a free app is not used, no backups are made.