What is a calculator vault, and how does the secret calculator app work?

In York Vault now

York Vault has a working calculator front, free on every plan, on iPhone and Android. Pair it with the calculator style icon, and the app looks like a calculator from the Home Screen to the first screen.

Why people search for calculator vaults

Calculator vault searches show up in every market and every language we studied, from “calculatrice” to “계산기”. Two groups search for them. Some people want one for their own photos. Others, often parents or partners, want to know if one is on a phone they share. This page answers both.

How a calculator vault works

1. The Home Screen shows a calculator icon.
2. The app opens to a working calculator.
3. You type your secret code on the keypad.
4. You press the equals key, or another key the app chooses.
5. The calculator gives way to the vault.

Calculator Lock’s App Store listing puts it this way: “Enter your password on hidden calculator photo vault and press ‘=’ button to open.” Privault’s lock uses a “Calculator Style” keypad, and the code ends with the percent key.

How York Vault’s calculator works

It is a calculator that holds up when someone uses it:

1. Turn on the calculator front in York Vault settings.
2. The lock screen becomes a real calculator, with basic and scientific keys, history, copy result and rotation.
3. Any sum gives the right answer.
4. Type your code on the keypad, then =. Your library opens on the first try.
5. Anything else stays a calculation.

There is no ad, no splash screen and no flash of your library before the calculator appears.

One Calculator Lock user named the failure this avoids: “Has the calculator Lock Screen, but has to load an add first…no calc does this, so it’s just off/not a real feature” (2 stars, 2024-10).

Why it must be a real calculator

Apple’s App Review Guidelines reject “False information and features” (1.1.6). They also say “Don’t include any hidden, dormant, or undocumented features in your app” (2.3.1). So a calculator front must do real math. The app must also say in its App Store listing and its notes to Apple that a vault sits behind it.

Keepsafe learned this the hard way. Its app text says: “Updated Apple policy (sec. 1.1.6) has required us to remove Secret Door.” Secret Door was a fake front that looked like a timer or a security scanner. York Vault does not ship fronts that fake a function, such as a scan that scans nothing. The working calculator and neutral icons are the only disguises.

How other apps do it

App	Calculator front	Where we read it
Calculator Lock	Working calculator with history. Type the PIN and press “=”. Reviews report an ad before the calculator.	App Store listing, app package, reviews
Privault	“Calculator Style” keypad. The code ends with “%”.	App package
LockMyPix	The listing says the app can look like “a Calculator”, but we found no calculator screen in its package.	App Store listing and app package
SPV	A calculator screen ships inside the package but is not shown to users.	App package
Keepsafe	Removed its fake fronts after Apple’s guideline 1.1.6	App text

We read each App Store package in September 2026 and checked the listings on 2026-10-02.

The name under the icon

iOS gives each app one Home Screen name, and an app cannot change it. LockMyPix’s app text admits this: “The app title cannot be changed due to iOS guidelines”. Calculator Lock’s App Store name is “Calculator Lock - Secure Vault”. One of its users wrote that the name “is a dead giveaway in our app list and folders”.

On iPhone and iPad, York Vault’s name under every icon is “YV”. It says nothing about a vault, but it is not “Calculator” either, so a person who reads the name can still wonder. On Android, each neutral icon carries its own home screen name, so the name under the calculator style icon changes with the icon.

On iPhone, a calculator icon helps against a glance at the Home Screen. It does not help against a person who reads the app list in Settings or App Library. On iOS 18 and later, Apple’s Hide and Require Face ID moves an App Store app into a locked Hidden folder. Our guide on how to hide apps on iPhone has the steps. Apple also lists every hidden app in Settings, under Apps, then Hidden Apps.

Calculator front or neutral icon

The two do different jobs, and they work together.

	Calculator style icon	Calculator front
Plan	Free	Free
What it changes	The picture on the Home Screen	The first screen when the app opens
Against a glance at the Home Screen	Helps	Helps
Against a person who opens the app	No help. They see a code screen.	Helps. They see a calculator that works.
Against a person who reads Settings	No help	No help

Use both for the best cover. Add a quick exit for the most common case: a person who walks up while the app is open.

If you forget the code

A calculator vault is only as safe as its way back in. Calculator Lock’s listing says: “You can enter “11223344=” for master reset your password by verifying your security question”. That code works for every user. York Vault uses a recovery key that only you hold instead.

To leave the app fast when someone walks up, see quick exit. To compare whole apps, read our Keepsafe alternative page.