Calculator vault apps vs Umbra
Calculator vault apps look like an ordinary calculator until you type a code and press equals. The disguise is clever. But a disguise hides the app, not the photos, and the listings of the most popular ones raise questions worth asking first.
Search the App Store or Google Play for a photo vault and you’ll find dozens of apps with a calculator icon. They work the same way: the app opens as a working calculator, and typing your passcode and pressing "=" opens the hidden vault. We looked at five of the most popular, using only what their own store listings say.
What the listings say
| App | Store | What its listing says |
|---|---|---|
| Calculator# Hide Photos Videos | App Store | Free with ads and limitations. Recovers a lost password through your registered email. No encryption claim in the description. |
| Calculator Lock - Secure Vault | App Store | Ads, removable for $3.99. Warns that uninstalling loses all your files. A forgotten password is reset by typing a fixed code and answering a security question. |
| Calculator - photo vault | Google Play | Contains ads. Claims AES encryption. Files are stored only on your device, so back up before a factory reset or new phone. |
| Calculator Lock - Hide Photos | Google Play | Contains ads. Its FAQ says removing the app deletes the files inside without a cloud backup, and reinstalling won’t bring them back. |
| Calculator Vault - App Hider | Google Play | Contains ads. Hides apps and photos in an encrypted gallery. |
Most also offer a fake vault with a second password and an intruder selfie, and sell weekly, yearly or lifetime upgrades.
Three things to check before trusting one
1. Does it actually encrypt?
Several listings don’t mention encryption at all, and others say only "AES" without detail. An app can hide files in its own folder without encrypting them. If the files aren’t encrypted, anyone who gets at the phone’s storage (through a computer backup or forensic tools) can read them, disguise or not.
2. What happens when you uninstall or switch phones?
Two of the listings warn, in their own words, that deleting the app deletes your files, and one says reinstalling won’t recover them. Files stored only on the device also don’t survive a lost phone or a factory reset unless you set up a backup. Check where the backup goes and whether it’s encrypted.
3. Who can reset the password?
Some calculator vaults recover a forgotten password through an email address or a well-known reset code plus a security question. That’s convenient, but if a fixed code printed in the store listing starts the reset, the main protection is a security question that people close to you might be able to answer.
A disguise hides the app, not the photos
A fake calculator works against someone glancing at your home screen. It does little against someone who already suspects there’s a vault, which is exactly the person you’re worried about. Calculator vault apps are well known, and typing a few numbers and "=" to see what happens is an obvious test.
What protects photos is encryption with a key only you hold, and an answer for when someone makes you open the app.
How Umbra compares
| Typical calculator vault | Umbra | |
|---|---|---|
| Ads | Usually, on the free version | No ads on any plan |
| Encryption | Often unstated or vague | AES-256-GCM per file, key from your pattern via Argon2id |
| Password reset | Email or a reset code and security question | 12-word recovery phrase only you hold |
| Backup | Varies; often device-only by default | Encrypted backups free: iCloud on iPhone and iPad, backup files on any phone |
| Fake vault | Common | Duress pattern that opens a decoy and removes access to real vaults (Pro) |
| Disguise | The whole app is a calculator | Optional disguise icon, such as Calculator (Pro) |
| Account | Sometimes an email | None |
Umbra can look like a calculator too. With Pro, you can switch its icon to Calculator or another everyday app, and on Android the name in the app drawer changes as well. The difference is that the disguise is the last layer, not the only one.
Questions
Are calculator vault apps safe?
Some are better than others. Check the listing for a specific encryption claim, read what happens on uninstall, and see how a forgotten password is reset. Several popular ones are ad-supported, vague about encryption, and warn that uninstalling deletes your files.
Can someone find photos in a calculator vault app?
Anyone who knows or guesses that the calculator is a vault can try to open it, and if files aren’t properly encrypted, they can be read from the phone’s storage with the right tools. A disguise doesn’t replace encryption.
Is there a calculator vault without ads?
Umbra has no ads on any plan and, with Pro, can disguise its icon as a calculator. It isn’t a working calculator; the disguise changes the icon and name, while the vault itself is protected by encryption and your pattern.
Does Apple allow calculator vault apps?
Yes. Several are on the App Store. Apple’s App Review Guidelines require apps to describe their features accurately and not to include hidden features that App Review can’t see, so disguised vaults have to disclose what they do to Apple.
Checked against public pages on 20 October 2026. Details change, so check the linked pages before you decide. Spotted something out of date? Tell us.