How to Stop iPhone Lock Screen Previews From Leaking Messages and Photos

Quick answer

Go to Settings > Notifications > Show Previews and choose When Unlocked or Never. "When Unlocked" holds message text, sender names, and calendar invite details until you authenticate with Face ID, Touch ID, or your passcode. "Never" keeps that content hidden everywhere — including inside Notification Center — until you open the app directly. Apple documents both options as a single global toggle, with per-app overrides if you want a stricter rule for one app than the rest. That covers the most obvious leak. As EFF puts it, anyone can read a message off a phone left face-up on a table without ever unlocking it — but previews are only one of a handful of Lock Screen surfaces worth checking, and the rest of this guide walks through the others.

Step-by-step

Turn off previews for every app

Open Settings, tap Notifications, tap Show Previews, then pick Never or When Unlocked. This global default covers Apple's own apps and any third-party app with notifications on — the notification still arrives, but message text, email subject lines, and Calendar invite details stop showing up with it. "When Unlocked" is actually the default on Face ID iPhones out of the box. So if you're seeing full previews right now, check whether the phone was restored from a backup or switched over from Android — that process sometimes carries the old "Always" setting forward.

Set a stricter rule for one app

Under Settings > Notifications, tap into any app and set its own Show Previews option below its notification style. Handy if you want Messages or Mail on "Never" while leaving something low-stakes on "Always." For the deeper per-thread walkthrough, see how to hide text messages and iMessage threads.

Confirm it worked

Lock the phone, have someone message you, and glance at the Lock Screen without unlocking. The app name and icon should still show, but not the content. If text still appears, a per-app override is probably set back to "Always" underneath the global change.

Common problems and fixes

"I still see message text after choosing Never"

Check that app's own setting under Settings > Notifications > [app]. A per-app override always wins over the global default.

Reply with Message still exposes content

Turning off previews doesn't disable Reply with Message, which lets someone send a text straight from the Lock Screen without unlocking the phone. Apple's Lock Screen access guide covers this under Settings > Face ID & Passcode > Allow Access When Locked — the same screen also gates Notification Center, Today View, Control Center, Wallet, and Return Missed Calls.

Widgets show the same information previews used to

Calendar, Reminders, and some third-party widgets display live content directly on the Lock Screen, independent of your Show Previews setting. Touch and hold the Lock Screen, tap Customize, and remove anything surfacing content you'd rather keep private.

Locking down one app instead of the whole system

If the concern is really one app, lock it with Face ID instead — that also suppresses its previews specifically.

If the phone is lost or stolen, not just borrowed

For that scenario, Stolen Device Protection adds a delay and a second Face ID check before someone can change your passcode, Apple ID password, or trusted devices.

Doing this with Privara

Every fix above controls what's visible on a surface someone can glance at without unlocking your phone — and that only matters because the content is sitting somewhere visible in the first place. Privara keeps your private photos, videos, documents, and contacts inside one AES-256-encrypted vault that looks and works exactly like a calculator, so there's no preview, widget, or notification for any of it to leak through. The vault opens only on your PIN, and it holds all four content types together: the photo you don't want in a shared album, the document a repair shop shouldn't see, the contact you'd rather keep off your main phone. Add Face ID or Touch ID on top, and it stays closed even if someone has your phone in hand. Download Privara on the App Store to move your most private content somewhere previews can't touch.

Frequently Asked Questions

Does turning off previews stop all notifications?

No. The app icon, app name, and a generic notification indicator still show up on the Lock Screen — only the message content, sender, or subject line is withheld. You'll still know something arrived; you just won't see what it says until you unlock the phone.

What's the difference between "When Unlocked" and "Never"?

"When Unlocked" shows content only after you authenticate with Face ID, Touch ID, or your passcode — glance at the phone and the text appears. "Never" withholds the content everywhere, including inside Notification Center, until you open the app directly. Choose "Never" for the strictest setting on apps like Messages or Mail.

Can I hide previews for just one app instead of everything?

Yes. Go to Settings > Notifications, tap the app, and set its own Show Previews option. This lets you keep previews on "Always" for low-stakes apps like weather while setting Messages, Mail, or banking apps to "Never."

Does "Reply with Message" still work if I turn off previews?

Reply with Message is a separate toggle under Settings > Face ID & Passcode (or Touch ID & Passcode) > Allow Access When Locked. Turning off previews stops the text from showing, but Reply with Message can still let someone act on a notification from the Lock Screen unless you disable it there too.

Do Lock Screen widgets leak the same kind of information?

They can. Calendar, Reminders, and some third-party widgets show at-a-glance data directly on the Lock Screen, independent of the Show Previews setting. Review what's placed there by touching and holding the Lock Screen, tapping Customize, and removing any widget that displays content you don't want visible before unlocking.