Step by step
Import into VaultBe
Open your vault, tap the add button, choose Photo Library and select the photos and videos you want to protect.
Wait for encryption to finish
Keep the app open until the "Encrypting" label disappears, then open one or two items to check they look right.
Delete the originals in Photos
Open the Photos app, select the same items and delete them.
Empty Recently Deleted
In Photos, open Recently Deleted under Utilities, tap Select, then Delete All. Until you do, the photos remain on your phone for 30 days.
Let iCloud Photos catch up
If you use iCloud Photos, the deletion syncs to your other devices. Check your iPad or Mac if you want to be sure.
Check shared albums and messages
Copies sent in Messages or added to shared albums are separate. Remove those too if they matter.
Avoid the problem next time
For anything sensitive, use the Private Camera. Photos taken there are encrypted directly into the vault and never exist in your library.
About quality
VaultBe optimises imported media to save space. If you want bit-for-bit originals, turn on Keep Originals in Vault Settings before you import.