Download Calculator Vault Pro to help protect your photo privacy. It's very practical, it protects your photos and saves space on your phone. Calculator Vault Pro can: 1, keep your fond memories, such as family photos, friends photo, graduation photos, etc. 2, protect the driver's license, ID card and other photo information 3, help you manage the gallery, organize important pictures As shown in Figure 4, it is disguised as a calculator to increase privacy protection.