Works for Diary with lock by Tuyen Bui whether or not it has its own passcode. No download needed.
Touch and hold Diary with lock by Tuyen Bui's icon, tap Require Face ID, then confirm. On iOS 18 and later that puts Diary with lock by Tuyen Bui 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 Diary with lock by Tuyen Bui with Face ID
- Find Diary with lock by Tuyen Bui on your Home Screen or in App Library.
- Touch and hold the icon until the quick-actions menu opens.
- Tap Require Face ID (or Require Touch ID / Require Passcode, depending on your iPhone).
- Tap Require Face ID again to confirm. Diary with lock by Tuyen Bui now asks for authentication every time it opens.
To test it, close Diary with lock by Tuyen Bui from the App Switcher and open it again. You should see the Face ID prompt before any content appears.
Hide Diary with lock by Tuyen Bui in App Library
- Touch and hold Diary with lock by Tuyen Bui's icon and tap Require Face ID.
- Choose Hide and Require Face ID instead of Require Face ID.
- Confirm. The icon leaves your Home Screen and moves to the Hidden folder at the bottom of App Library.
- 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 Diary with lock by Tuyen Bui?
Diary with lock by Tuyen Bui 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 Diary with lock by Tuyen Bui sends to its developer; for that, see Diary with lock by Tuyen Bui's full privacy report.
What the lock does and does not do
It does
- Ask for Face ID, Touch ID or passcode every time Diary with lock by Tuyen Bui opens
- Hide message previews in notifications
- Keep Diary with lock by Tuyen Bui'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 Diary with lock by Tuyen Bui stores data
- Sync to your iPad or other devices
- Remove Diary with lock by Tuyen Bui 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 Diary with lock by Tuyen Bui
Notifications
Settings › Notifications › Diary with lock by Tuyen Bui › Show Previews: When Unlocked keeps message and account details off the Lock Screen.
Diary with lock by Tuyen Bui's full privacy label
The developer states that no data is collected from this app.
Is Diary with lock by Tuyen Bui safe? Every data type explained →
Lock these apps too
After you lock Diary with lock by Tuyen Bui
Done. You have applied every control the label points to.
FAQ
Does Diary with lock by Tuyen Bui have its own passcode?
What happens to Diary with lock by Tuyen Bui's notifications when it is locked?
Can someone who knows my passcode open a locked app?
Is a locked Diary with lock by Tuyen Bui encrypted?
Why can't I see the Require Face ID option?
Does hiding Diary with lock by Tuyen Bui remove it from my purchase history?
Is Diary with lock by Tuyen Bui safe? Full privacy report →Does Diary with lock by Tuyen Bui track you? →Lock an app: A–Z →All lifestyle apps →