# Simple vs Stealth Calculator Vault

The clearest difference is in-app purchases: Simple at none against Stealth Calculator Vault's 3. Simple also leads on update cadence (every 2 weeks vs every 7 months). Stealth Calculator Vault's advantage is iOS requirement (13.0 vs 15.8.3). On price, ads and device support there is nothing between them.

Both are free to download. Stealth Calculator Vault sells 3 in-app purchases, starting at $1.99 per 7 days. Simple asks for nothing beyond the download.

Simple ships an update every 2 weeks, Stealth Calculator Vault every 7 months. Both last shipped on October 1, 2026.

## The numbers

| Metric | Simple | Stealth Calculator Vault |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.3 (3 ratings)](https://appshunter.io/ios/app/stealth-calculator-vault/id6503435320/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 2 weeks** | Every 7 months |
| Monetization | — | Free with in-app purchases |
| Size | 36 MB | 39 MB |
| Requires iOS | 15.8.3 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) | [Radhika Navadiya](https://appshunter.io/developer/1738195817) |

## What reviewers say

### Simple

[App page](https://appshunter.io/ios/app/simple-camera/id6501969962)

**Features:** macOS Compatibility

**In-app purchases:** none


### Stealth Calculator Vault

[App page](https://appshunter.io/ios/app/stealth-calculator-vault/id6503435320)

Securely hide your photos, videos, documents, notes, passwords, and other sensitive data behind a disguised calculator interface. Protect your privacy with a customizable app icon and a private vault for all your important information.

**Highlights:** Unlimited photo and video hiding, Secure storage for notes and documents, Password and card detail protection, Customizable app icon, Private vault for all data, Location and contact storage

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock all features | $1.99 | per 7 days |
| Unlock all Features | $4.99 | per month |
| Unlock all features | $29.99 | per year |


## Frequently asked questions

### Is Simple free?

Simple is free to download, with no in-app purchases.

### Is Stealth Calculator Vault free?

Stealth Calculator Vault is free to download, with in-app purchases available.

### Do Simple or Stealth Calculator Vault have ads?

Both Simple and Stealth Calculator Vault show ads.

### Which is updated more often, Simple or Stealth Calculator Vault?

Simple ships an update every 2 weeks, and Stealth Calculator Vault every 7 months. Most recently, Simple was updated on October 1, 2026 and Stealth Calculator Vault on October 1, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*