Works for Arca by Privacy Everywhere whether or not it has its own passcode. No download needed.
Touch and hold Arca by Privacy Everywhere's icon, tap Require Face ID, then confirm. On iOS 18 and later that puts Arca by Privacy Everywhere 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 Arca by Privacy Everywhere with Face ID
- Find Arca by Privacy Everywhere 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. Arca by Privacy Everywhere now asks for authentication every time it opens.
To test it, close Arca by Privacy Everywhere from the App Switcher and open it again. You should see the Face ID prompt before any content appears.
Hide Arca by Privacy Everywhere in App Library
- Touch and hold Arca by Privacy Everywhere'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 Arca by Privacy Everywhere?
Arca by Privacy Everywhere is a secure email app, the kind of app that tends to hold personal information you would not want on screen if someone borrows your unlocked phone. Email apps see every message and contact. Third-party mail clients may route mail through their own servers to offer features like push or AI summaries.
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 Arca by Privacy Everywhere sends to its developer; for that, see Arca by Privacy Everywhere's full privacy report.
What the lock does and does not do
It does
- Ask for Face ID, Touch ID or passcode every time Arca by Privacy Everywhere opens
- Hide message previews in notifications
- Keep Arca by Privacy Everywhere'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 Arca by Privacy Everywhere stores data
- Sync to your iPad or other devices
- Remove Arca by Privacy Everywhere 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 Arca by Privacy Everywhere
Notifications
Settings › Notifications › Arca by Privacy Everywhere › Show Previews: When Unlocked keeps message and account details off the Lock Screen.
Arca by Privacy Everywhere's full privacy label
None declared
None declared
Is Arca by Privacy Everywhere safe? Every data type explained →
Lock these apps too
After you lock Arca by Privacy Everywhere
Done. You have applied every control the label points to.
FAQ
Does Arca by Privacy Everywhere have its own passcode?
What happens to Arca by Privacy Everywhere's notifications when it is locked?
Can someone who knows my passcode open a locked app?
Is a locked Arca by Privacy Everywhere encrypted?
Why can't I see the Require Face ID option?
Does hiding Arca by Privacy Everywhere remove it from my purchase history?
Is Arca by Privacy Everywhere safe? Full privacy report →Does Arca by Privacy Everywhere track you? →Lock an app: A–Z →All productivity apps →