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How to Lock Lemon Diary-journaling app on iPhone

iOS 18 Face ID lock and Hidden folder · 晓庆 韩 · checked November 2026

Time needed
4 taps
Needs iOS 18 or later

Works for Lemon Diary-journaling app whether or not it has its own passcode. No download needed.

Short answer

Touch and hold Lemon Diary-journaling app's icon, tap Require Face ID, then confirm. On iOS 18 and later that puts Lemon Diary-journaling app 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 Lemon Diary-journaling app with Face ID

  1. Find Lemon Diary-journaling app 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. Lemon Diary-journaling app now asks for authentication every time it opens.

To test it, close Lemon Diary-journaling app from the App Switcher and open it again. You should see the Face ID prompt before any content appears.

Hide Lemon Diary-journaling app in App Library

  1. Touch and hold Lemon Diary-journaling app'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 Lemon Diary-journaling app?

Lemon Diary-journaling app 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 Lemon Diary-journaling app sends to its developer; for that, see Lemon Diary-journaling app's full privacy report.

What the lock does and does not do

It does

  • Ask for Face ID, Touch ID or passcode every time Lemon Diary-journaling app opens
  • Hide message previews in notifications
  • Keep Lemon Diary-journaling app'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 Lemon Diary-journaling app stores data
  • Sync to your iPad or other devices
  • Remove Lemon Diary-journaling app 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 Lemon Diary-journaling app

  1. Tracking

    Settings › Privacy & Security › Tracking. If “Allow Apps to Request to Track” is off, apps cannot ask, and they are told to treat you as having declined. You can also turn it off for this app alone.

  2. Notifications

    Settings › Notifications › Lemon Diary-journaling app › Show Previews: When Unlocked keeps message and account details off the Lock Screen.

Lemon Diary-journaling app's full privacy label

App Privacy label Developer-reported · checked November 1, 2026
Used to track you
3types
Linked to you
3types
Not linked to you
0types

None declared

Is Lemon Diary-journaling app safe? Every data type explained →

Lock these apps too

After you lock Lemon Diary-journaling app

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 Lemon Diary-journaling app 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 Lemon Diary-journaling app does; the iOS 18 lock works regardless.
What happens to Lemon Diary-journaling app'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 Lemon Diary-journaling app 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 Lemon Diary-journaling app 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 Lemon Diary-journaling app safe? Full privacy report →Does Lemon Diary-journaling app 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