CalcLockAt a glance: Stop active screen mirroring and check your audio destination before opening a private collection. Local encrypted storage does not prevent disclosure through an unlocked display.
Remember the display you used earlier
You may finish showing holiday pictures on a television and then open a private collection without thinking about the connection. The risk in that moment is not how files are encrypted on disk. It is whether a screen you are actively using is also visible somewhere else.
Pause on a harmless screen before entering your CalcLock expression. Consider the last activity: an AirPlay presentation, a video call with screen sharing, or a connected display. The controls for those sessions can differ. Do not use the vault itself as your test image, and do not type its entry sequence while checking whether the television is still following you.
Stop AirPlay mirroring explicitly
Apple’s instructions for ending iPhone screen mirroring are to open Control Center, choose Screen Mirroring, then Stop Mirroring. If you were streaming from an app rather than mirroring the entire screen, use that app’s AirPlay controls and select your iPhone as the destination.
Look at the receiving display if it is yours and safely visible. Confirm that it no longer follows your actions using ordinary, nonsensitive content. Closing a photo or switching apps is not a substitute for ending a session. For a meeting app’s screen-sharing feature, stop sharing within that meeting interface as well.
Review automatic connections at a quiet moment
Apple documents automatic AirPlay options under Settings, General, AirPlay & Continuity, Automatically AirPlay. Read the choices and select the behavior that suits you. If unexpected connections concern you, a setting that requires more deliberate action may be more appropriate than automatic use.
Treat that as a future preference, not proof that a current connection has ended. Finish the active-session check first. If you routinely use a shared TV, make a short end-of-session routine: stop sharing, confirm the receiver is disconnected, and only then return to personal content.
Check audio separately
A screen can be private while sound reaches a speaker in another room. Before playing a video or audio file, check the current output and start with a harmless sound at a modest volume. Headphones are useful only if they are actually connected and selected.
CalcLock includes an audio player and accepts video files, so this matters beyond still photographs. Spoken names, conversations, and other audio details can be revealing even when nobody sees the display. Pause playback before changing outputs and confirm the new route before continuing.
Keep storage and display protection separate
CalcLock encrypts its stored files and manifest using AES-256-GCM with a device Keychain secret. That storage design does not justify claiming that screenshots, recordings, external displays, or every mirroring path are blocked. Only rely on an app-level restriction if it is specifically documented and verified for your setup.
If something private was displayed, stop the connection immediately and establish which audience could actually see it. Do not assume ending the stream retracts any recording or photograph already made. For everyday prevention, the most useful habit is a deliberate display check before unlocking, not after a private image has appeared.
Questions, answered
Does device-only storage mean nobody can see a mirrored screen?
No. Storage location and display sharing are separate. Check active sharing before entering a vault or viewing its contents.