# Glossary library

## Quick answer

Browse the glossary reference library for iPhone privacy.

Updated: 2026-10-31

Canonical: /glossary

## Questions

### Were these apps security-tested here?

No. The comparison uses linked provider documentation and a repeatable checklist. No hands-on rating, sponsored ranking or universal best choice is implied.

### How should I choose?

Compare your access concern, recovery needs, backup path and export support. Test ordinary sample files before migrating important content.

## Explore

- [What is Notification preview?](/glossary/notification-preview)

- [What is Screen Time?](/glossary/screen-time)

- [What is Locked note?](/glossary/locked-note)

- [What is Hidden album?](/glossary/hidden-album)

- [What is App Library?](/glossary/app-library)

- [What is Hidden apps folder?](/glossary/hidden-apps-folder)

- [What is Face ID?](/glossary/face-id)

- [What is Device passcode?](/glossary/device-passcode)

- [What is Authentication?](/glossary/authentication)

- [What is Encryption?](/glossary/encryption)

- [What is End-to-end encryption?](/glossary/end-to-end-encryption)

- [What is iCloud Photos?](/glossary/icloud-photos)

- [What is Sharing link?](/glossary/sharing-link)

- [What is Recovery?](/glossary/recovery)

- [What is Photo metadata?](/glossary/photo-metadata)

## Private photo and document storage

For photos and documents you choose to store separately, explore [VaultForYou](https://www.vaultforyou.app/).