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How to Lock Sweet Diary - Journal App on iPhone

iOS 18 Face ID lock and Hidden folder · 敏华 黎 · checked November 2026

Time needed
4 taps
Needs iOS 18 or later

Works for Sweet Diary - Journal App whether or not it has its own passcode. No download needed.

Short answer

Touch and hold Sweet Diary - Journal App's icon, tap Require Face ID, then confirm. On iOS 18 and later that puts Sweet Diary - Journal 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 Sweet Diary - Journal App with Face ID

  1. Find Sweet Diary - Journal 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. Sweet Diary - Journal App now asks for authentication every time it opens.

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

Hide Sweet Diary - Journal App in App Library

  1. Touch and hold Sweet Diary - Journal 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 Sweet Diary - Journal App?

Sweet Diary - Journal 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.

Productivity apps tend to collect the work you do in them — documents, notes and files — so User Content is common. The question is whether it syncs to the developer's servers and how it is protected there.

A lock answers one question — who can open the app on this iPhone. It does not change what Sweet Diary - Journal App sends to its developer; for that, see Sweet Diary - Journal 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 Sweet Diary - Journal App opens
  • Hide message previews in notifications
  • Keep Sweet Diary - Journal 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 Sweet Diary - Journal App stores data
  • Sync to your iPad or other devices
  • Remove Sweet Diary - Journal 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 Sweet Diary - Journal 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 › Sweet Diary - Journal App › Show Previews: When Unlocked keeps message and account details off the Lock Screen.

Sweet Diary - Journal 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 Sweet Diary - Journal App safe? Every data type explained →

Lock these apps too

After you lock Sweet Diary - Journal 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 Sweet Diary - Journal 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 Sweet Diary - Journal App does; the iOS 18 lock works regardless.
What happens to Sweet Diary - Journal 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 Sweet Diary - Journal 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 Sweet Diary - Journal 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 Sweet Diary - Journal App safe? Full privacy report →Does Sweet Diary - Journal App track you? →Lock an app: A–Z →All productivity 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