Informant will automatically create a backup of your database on a set interval or you can create a backup at any time.

To create a backup on iOS Informant go to informant settings>backup/restore
To setup automatic backups set the backup interval you want to apply and it will fire on that interval and save to iCloud drive automatically.

To create a backup now select the option to make a backup now. It will automatically be saved to your device; or you can choose to email the backup to yourself or save it to iCloud.