Trainer app cleanup of images saved on device

This could be used in conjunction with my previous post https://axcelerate.zendesk.com/hc/en-gb/community/posts/360005858555-Trainer-app-automatic-cleanup-of-files

When using the setting to 'Cleanup Files' in the Trainer app this does not seem to cleanup the images that have been stored on the device. When media has been uploaded and stored on the Axcelerate server there will be no reason to keep media on the device. For privacy issues I believe it is important to remove these files automatically in cleanup.