Calculator photo vault apps compared with Vaultopaz
A calculator photo vault suits people who mainly want their photos behind a screen that looks and works like an ordinary calculator. Vaultopaz suits people who want separate vaults that each open with their own pattern, AES-256-GCM encryption tied to the phone's hardware keystore, and a backup file they can take to a new phone.
The short version
A calculator photo vault is an app that looks and works like an ordinary calculator, with your photos behind it until you type the right code. Vaultopaz takes another route: it opens to a pattern grid, and every pattern opens its own encrypted vault. We compared it with three calculator photo vault apps on Google Play; what follows about them comes from their own Play descriptions, not from our tests.
Side by side
| Topic | Calculator photo vaults (three examples) | Vaultopaz |
|---|---|---|
| Where files are stored | All three say files stay on the phone only and are not stored online. | Encrypted in its own private storage on the phone. No cloud and no servers. |
| How you unlock | Each one opens as a working calculator. You type a numeric code or PIN on it, and two of them ask you to press = after the code. | A pattern on a 5 by 5 grid. Each pattern opens its own vault. |
| Encryption | One names AES, without a key length or key storage. Another calls its video space encrypted, and the third says files and notes are encrypted; neither names an algorithm. | AES-256-GCM, with keys wrapped by the phone’s hardware keystore. |
| Backup | One tells you to back up hidden files yourself before a factory reset or a new phone. One mentions an optional vault backup without saying where it goes. One describes no backup. | A file you export yourself, sealed with a password or your recovery phrase. |
| Account | None of the three descriptions mentions creating an account. | None. No sign-up, no internet permission and no analytics. |
| If you lose access | Two let you get the password back with a fixed code on the calculator and a security question you set up. Not stated by the third developer. | Nine recovery words, shown once at setup, reopen the vault on the same phone. Losing both the pattern and the phrase means the files are gone. |
| Moving to a new phone | One says to back up your files before you move, because they are only on the phone. One points to its optional vault backup. Not stated by the third developer. | Through an encrypted backup file. The recovery phrase alone does not move a vault. |
| Which phones | Android phones, through Google Play. | Android 10 or newer, with a hardware-backed keystore. |
Where calculator photo vaults are the better choice
- A screen that looks like something else. That is the whole idea of a calculator vault: someone who opens it sees an ordinary calculator that really works.
- A different icon. One of the three can also swap its icon for a music, clock or utility look.
- Video straight into the vault. Two of them let you take photos or record video directly inside the vault.
- A way back if you forget. Two of them let you get the password back through a security question you set up.
- Extra options. The descriptions list things like a photo of someone who enters a wrong password, a second password that opens a decoy vault, closing it by shaking the phone, and a trash bin for deleted files.
Where Vaultopaz is different
- One pattern, one vault. Each pattern opens its own vault. The unlock screen never lists vaults, and a pattern that opens nothing gets the same quiet refusal as a mistyped one.
- Encryption on the device. Files, notes and metadata are encrypted with AES-256-GCM, with keys derived through Argon2id and wrapped by the phone’s hardware keystore.
- A backup file that travels. The encrypted backup is one portable file, sealed with a password or your recovery phrase, that opens on another phone without this phone’s hardware key.
- A recovery phrase. Nine words shown once at setup reopen the vault on the same phone.
- No account and no network. Vaultopaz has no sign-up, no servers, no internet permission and no analytics.
- Notes, folders and search. Next to photos and any other file, a vault holds encrypted notes, nested folders, name search and sorting.
- Auto-lock and screenshot block. The vault locks immediately or 30 seconds, 2 or 5 minutes after you leave, and content screens refuse screenshots and screen recording.
Vaultopaz has no calculator screen and no option to change its icon, and its vaults still take up storage that someone inspecting the phone can see. Its viewer opens images, videos, text files and notes; PDFs and other documents are stored and can be exported, but they do not open inside the vault. It has not had an independent security review yet.
Moving from a calculator photo vault to Vaultopaz
There is no automatic transfer. First restore the files from the calculator app to the phone; one of the three, for example, restores a file when you long press it in the vault and tap the restore button. Then import them in Vaultopaz through the Android system file picker. Vaultopaz does not delete the originals, so remove the restored copies yourself once everything has arrived in the vault.
To see how separate patterns lead to separate vaults, read one pattern, one vault, and for what protects the files, see encryption on the device. For a comparison with another vault app, see Vaultopaz vs Keepsafe.
Good to know: the limits
- The app has not had an independent security review yet.
- Hidden vaults still occupy storage; size and, beyond padding, count are not invisible to someone inspecting the device.
- The viewer opens images, videos, text files and notes. Videos play with the phone's own decoder straight from the encrypted file, so a format the phone cannot decode shows a message instead; PDFs and other documents are stored and exportable but not shown inside the vault.
- Losing both the pattern and the recovery phrase means the files are gone. There is no account and no reset.
- The recovery phrase works only on the same phone. Moving to another device needs an encrypted backup file.
Frequently asked questions
How does a calculator photo vault work?
It opens as a working calculator. In the three apps we looked at, you type your numeric code or PIN on the calculator screen to reach the hidden photos, and two of them ask you to press = after the code.
Do calculator photo vaults upload my photos?
The three Play descriptions we read all say files stay on the phone and are not stored online. None of them mentions creating an account.
What if I forget the code of a calculator photo vault?
Two of the three describe getting the password back by typing a fixed code on the calculator and answering the security question you set up. The third does not describe it.
Does Vaultopaz look like a calculator?
No. Vaultopaz has no calculator screen and no option to change its icon. It opens to a 5 by 5 pattern grid that never lists vaults, and a pattern that opens nothing gets the same quiet refusal as a mistyped one.