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How to Lock My Super Secret Diary Notes on iPhone

iOS 18 Face ID lock and Hidden folder · Ivan Antic · checked November 2026

Time needed
4 taps
Needs iOS 18 or later

Works for My Super Secret Diary Notes whether or not it has its own passcode. No download needed.

Short answer

Touch and hold My Super Secret Diary Notes' icon, tap Require Face ID, then confirm. On iOS 18 and later that puts My Super Secret Diary Notes 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 My Super Secret Diary Notes with Face ID

  1. Find My Super Secret Diary Notes 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. My Super Secret Diary Notes now asks for authentication every time it opens.

To test it, close My Super Secret Diary Notes from the App Switcher and open it again. You should see the Face ID prompt before any content appears.

Hide My Super Secret Diary Notes in App Library

  1. Touch and hold My Super Secret Diary Notes' 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 My Super Secret Diary Notes?

My Super Secret Diary Notes' privacy label lists location and user content — the kind of data 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 My Super Secret Diary Notes sends to its developer; for that, see My Super Secret Diary Notes' full privacy report.

What the lock does and does not do

It does

  • Ask for Face ID, Touch ID or passcode every time My Super Secret Diary Notes opens
  • Hide message previews in notifications
  • Keep My Super Secret Diary Notes' 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 My Super Secret Diary Notes stores data
  • Sync to your iPad or other devices
  • Remove My Super Secret Diary Notes 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 My Super Secret Diary Notes

  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. Location

    Settings › Privacy & Security › Location Services › My Super Secret Diary Notes. Choose While Using or Never, and switch off Precise Location if a city-level answer is enough.

  3. Photos

    Settings › Privacy & Security › Photos. Limited Access lets you pick exactly which pictures the app can see; Add Photos Only lets it save without reading your library.

  4. Notifications

    Settings › Notifications › My Super Secret Diary Notes › Show Previews: When Unlocked keeps message and account details off the Lock Screen.

My Super Secret Diary Notes' full privacy label

App Privacy label Developer-reported · checked November 1, 2026
Used to track you
4types
Linked to you
5types
Not linked to you
4types

Is My Super Secret Diary Notes safe? Every data type explained →

Lock these apps too

After you lock My Super Secret Diary Notes

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 My Super Secret Diary Notes 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 My Super Secret Diary Notes does; the iOS 18 lock works regardless.
What happens to My Super Secret Diary Notes' 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 My Super Secret Diary Notes 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 My Super Secret Diary Notes 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 My Super Secret Diary Notes safe? Full privacy report →Does My Super Secret Diary Notes 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