Works for aDiary whether or not it has its own passcode. No download needed.
Touch and hold aDiary's icon, tap Require Face ID, then confirm. On iOS 18 and later that puts aDiary 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 aDiary with Face ID
- Find aDiary 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. aDiary now asks for authentication every time it opens.
To test it, close aDiary from the App Switcher and open it again. You should see the Face ID prompt before any content appears.
Hide aDiary in App Library
- Touch and hold aDiary'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 aDiary?
aDiary's privacy label lists 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 aDiary sends to its developer; for that, see aDiary's full privacy report.
What the lock does and does not do
It does
- Ask for Face ID, Touch ID or passcode every time aDiary opens
- Hide message previews in notifications
- Keep aDiary'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 aDiary stores data
- Sync to your iPad or other devices
- Remove aDiary 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 aDiary
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.
Notifications
Settings › Notifications › aDiary › Show Previews: When Unlocked keeps message and account details off the Lock Screen.
aDiary's full privacy label
None declared
None declared
Lock these apps too
After you lock aDiary
Done. You have applied every control the label points to.
FAQ
Does aDiary have its own passcode?
What happens to aDiary's notifications when it is locked?
Can someone who knows my passcode open a locked app?
Is a locked aDiary encrypted?
Why can't I see the Require Face ID option?
Does hiding aDiary remove it from my purchase history?
Is aDiary safe? Full privacy report →Does aDiary track you? →Lock an app: A–Z →All productivity apps →