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How to Lock Prilog on iPhone

iOS 18 Face ID lock and Hidden folder · Sangseon Kim · checked November 2026

Time needed
4 taps
Needs iOS 18 or later

Works for Prilog whether or not it has its own passcode. No download needed.

Short answer

Touch and hold Prilog's icon, tap Require Face ID, then confirm. On iOS 18 and later that puts Prilog behind Face ID, Touch ID or your passcode; choose Hide and Require Face ID instead to move it into App Library's Hidden folder as well.

Lock Prilog with Face ID

  1. Find Prilog on your Home Screen or in App Library.
  2. Touch and hold the icon until the quick-actions menu opens.
  3. Tap Require Face ID (or Require Touch ID / Require Passcode, depending on your iPhone).
  4. Tap Require Face ID again to confirm. Prilog now asks for authentication every time it opens.

To test it, close Prilog from the App Switcher and open it again. You should see the Face ID prompt before any content appears.

Hide Prilog in App Library

  1. Touch and hold Prilog's icon and tap Require Face ID.
  2. Choose Hide and Require Face ID instead of Require Face ID.
  3. Confirm. The icon leaves your Home Screen and moves to the Hidden folder at the bottom of App Library.
  4. To open it later, swipe to App Library, tap Hidden and authenticate.

Hiding also locks the app. To undo either, touch and hold the icon again and choose Don't Require Face ID.

Why lock Prilog?

Prilog is a journal & diary app, the kind of app that tends to hold personal information you would not want on screen if someone borrows your unlocked phone. Journals collect your private thoughts, moods and often your location and photos. A lock screen inside the app is not the same as encryption of the synced entries.

Lifestyle apps cover family, home and personal organisation, and often combine location, contacts and photos in one place.

A lock answers one question — who can open the app on this iPhone. It does not change what Prilog sends to its developer; for that, see Prilog's full privacy report.

What the lock does and does not do

It does

  • Ask for Face ID, Touch ID or passcode every time Prilog opens
  • Hide message previews in notifications
  • Keep Prilog's content out of Spotlight and Siri suggestions
  • With Hide, remove the icon from the Home Screen

It does not

  • Stop someone who knows your passcode
  • Encrypt or change how Prilog stores data
  • Sync to your iPad or other devices
  • Remove Prilog from purchase history or Screen Time reports

Don't see Require Face ID?

  • Update to iOS 18 or later in Settings › General › Software Update.
  • Make sure a passcode is set in Settings › Face ID & Passcode; the lock needs one.
  • Some Apple apps (Settings, Calculator, Camera, Maps, Find My, Clock) cannot be locked or hidden.
  • If your iPhone is managed by work or school, the option may be restricted.

Other settings worth checking for Prilog

  1. Notifications

    Settings › Notifications › Prilog › Show Previews: When Unlocked keeps message and account details off the Lock Screen.

Prilog's full privacy label

App Privacy label Developer-reported · checked November 1, 2026
Used to track you
0types

None declared

Linked to you
0types

None declared

Not linked to you
1type

Is Prilog safe? Every data type explained →

Lock these apps too

After you lock Prilog

Tick what you have done
Tick each step as you do it on your iPhone.

Done. You have applied every control the label points to.

FAQ

Does Prilog have its own passcode?
Some apps offer an in-app PIN or biometric lock in their settings. The App Store privacy label does not say whether Prilog does; the iOS 18 lock works regardless.
What happens to Prilog's notifications when it is locked?
Locked and hidden apps do not show message previews or content in notifications, and their content does not appear in Spotlight search or Siri suggestions.
Can someone who knows my passcode open a locked app?
Yes. If Face ID fails, the lock falls back to your device passcode. Keep the passcode private if the lock matters to you.
Is a locked Prilog encrypted?
The lock controls who can open the app on this iPhone. It does not change how the app stores or syncs data. Encryption depends on the developer and on your device passcode.
Why can't I see the Require Face ID option?
You need iOS 18 or later. Some Apple apps such as Settings, Calculator, Maps and Camera cannot be locked or hidden.
Does hiding Prilog remove it from my purchase history?
No. Hidden apps still appear in App Store purchases and in Settings › Apps, and Screen Time reports still include them.

Is Prilog safe? Full privacy report →Does Prilog track you? →Lock an app: A–Z →All lifestyle apps →

Facts on this page come from Apple: lock or hide an app on iPhone, as reported by the developer. Checked November 2026. How we collect data · Report a correction