Due to the restriction Google Permission Policy, we are forced to cancel the feature of launching by dialer when you hide the icon, and the new version will be released in March. After the update, you will find that the hidden GalleryVault icon will appear on Launch. We recommend using the feature the "Icon Disguise" which is more stable.

The “Icon Disguise” feature can disguise "GalleryVault" as a calculator, then you will see the calculator icon on your launch, and no one knows the existence of GalleryVault except you. 

We apologize for the inconvenience that this may cause to you If you have any comments regarding the above content, please feel free to contact support.

How to disguise icon?