Choosing an app to hide pictures

Questions to ask before you move private photos into any app, covering encryption, recovery, backups, export and data collection.

The App Store lists plenty of photo hiding apps, and their descriptions tend to sound alike. The icon and the marketing page cannot tell you much about how your photos are stored. A short list of questions can.

Start with whether you need one

Write down the person or situation you are worried about, since each calls for a different tool.

• A swipe by someone holding your phone: the Hidden album or Guided Access may be enough.
• A partner, kid or friend who knows your passcode: you need a separate secret.
• Someone pressuring you to unlock the phone: a technical tool is the smaller part of this. Please read this page on safety.

Questions about encryption

Look for plain statements in the app’s documentation or privacy policy.

• Does it encrypt the photos themselves, or only ask for a code to open the app?
• Which algorithm does it use, and where do the keys live?
• Does the key come from your secret, or does the company hold it?
• Has anyone outside the company reviewed the security?

Vague wording such as “military-grade” tells you little without those details. If you cannot find answers, ask support, and treat silence as useful information.

Questions about recovery

• What happens if you forget your code?
• If an email reset restores access, who else could use it?
• Do you need an account at all, and what information does it require?

Easy recovery and strong privacy pull against each other. Pick the balance that suits your risk, and understand which one you chose.

Questions about backups and leaving

• Are photos backed up anywhere, and is that copy encrypted?
• What happens to your photos when you get a new phone?
• Can you export everything at full quality, without a paid plan?
• What happens if your subscription lapses?

Apple says that deleting an app removes it and its data from your iPhone. For an app with no backup, that means a phone reset could erase your collection. Check before you delete the originals.

Questions about data and permissions

• What does the App Store privacy label say the app collects? Apple describes these labels as a way to understand how apps handle your data.
• Does it show ads, and does it use ad trackers?
• Which permissions does it request? You can review them in Settings under Privacy & Security.

Read our guide to photo permissions for how to limit what an app can read while you try it out.

Test before you trust

1. Install the app and add five photos you would not mind losing.
2. Close it, reopen it and try a wrong code.
3. Run its backup or export, then confirm that the copy opens.
4. Delete and reinstall the app, and find out what survives.
5. Read the cancellation terms.

Only then move anything private. Keep a second copy of irreplaceable photos somewhere you control, because a vault app is a single point of failure as much as a lock.