# Calculator+ Secure Vault vs QLU World

The clearest difference is in-app purchases: QLU World at none against Calculator+ Secure Vault's 4. QLU World also leads on ads (none vs shown) and iOS requirement (15.6 vs 18.0). On price, update cadence and device support there is nothing between them.

Both are free to download. Calculator+ Secure Vault sells 4 in-app purchases, starting at $5.99 per 3 months. QLU World asks for nothing beyond the download.

Calculator+ Secure Vault ships an update fortnightly, QLU World every 2 weeks. The most recent releases landed on October 23, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Calculator+ Secure Vault | QLU World |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (107 ratings)](https://appshunter.io/ios/app/calculator-plus-secure-vault/id6744875928/reviews)** | — |
| Number of ratings | **107** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 72 MB | 57 MB |
| Requires iOS | 18.0 | **15.6** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 17+ | 12+ |
| Developer | [Ahmet Selman Durak](https://appshunter.io/developer/868110029) | [DNNae Inc](https://appshunter.io/developer/1649679895) |

## What reviewers say

### Calculator+ Secure Vault

[App page](https://appshunter.io/ios/app/calculator-plus-secure-vault/id6744875928)

Securely store and protect your private photos, videos, notes, and credit card information. This encrypted vault offers features like a screenshot blocker and emergency exit for ultimate privacy and peace of mind.

**Highlights:** Photo & Video Vault, Notes & Credit Cards Storage, Cloud Backup (iCloud/Google Drive), Screenshot Blocker, Emergency Exit, Dynamic Security Screen

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Calculator + 3 Monthly Premium | $5.99 | per 3 months |
| Calculator+ 6 Monthly Premium | $9.99 | per 6 months |
| Calculator+ Annual Premium | $17.99 | per year |
| Calculator+ Lifetime Premium | $39.99 | one-time |


### QLU World

[App page](https://appshunter.io/ios/app/qlu-world/id6753807356)

**In-app purchases:** none


## Frequently asked questions

### Is Calculator+ Secure Vault free?

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

### Is QLU World free?

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

### Do Calculator+ Secure Vault or QLU World have ads?

Calculator+ Secure Vault shows ads; QLU World does not.

### Which is updated more often, Calculator+ Secure Vault or QLU World?

Calculator+ Secure Vault ships an update fortnightly, and QLU World every 2 weeks. Most recently, Calculator+ Secure Vault was updated on October 23, 2026 and QLU World on October 28, 2026.

---

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